feat(link-modules,modules-sdk, utils, types, products) - Remote Link and Link modules (#4695)

What:
- Definition of all Modules links
- `link-modules` package to manage the creation of all pre-defined link or custom ones

```typescript
import { initialize as iniInventory } from "@medusajs/inventory";
import { initialize as iniProduct } from "@medusajs/product";

import {
  initialize as iniLinks,
  runMigrations as migrateLinks
} from "@medusajs/link-modules";

await Promise.all([iniInventory(), iniProduct()]);


await migrateLinks(); // create tables based on previous loaded modules

await iniLinks(); // load link based on previous loaded modules

await iniLinks(undefined, [
  {
    serviceName: "product_custom_translation_service_link",
    isLink: true,
    databaseConfig: {
      tableName: "product_transalations",
    },
    alias: [
      {
        name: "translations",
      },
    ],
    primaryKeys: ["id", "product_id", "translation_id"],
    relationships: [
      {
        serviceName: Modules.PRODUCT,
        primaryKey: "id",
        foreignKey: "product_id",
        alias: "product",
      },
      {
        serviceName: "custom_translation_service",
        primaryKey: "id",
        foreignKey: "translation_id",
        alias: "transalation",
        deleteCascade: true,
      },
    ],
    extends: [
      {
        serviceName: Modules.PRODUCT,
        relationship: {
          serviceName: "product_custom_translation_service_link",
          primaryKey: "product_id",
          foreignKey: "id",
          alias: "translations",
          isList: true,
        },
      },
      {
        serviceName: "custom_translation_service",
        relationship: {
          serviceName: "product_custom_translation_service_link",
          primaryKey: "product_id",
          foreignKey: "id",
          alias: "product_link",
        },
      },
    ],
  },
]); // custom links
```

Remote Link

```typescript
import { RemoteLink, Modules } from "@medusajs/modules-sdk";

// [...] initialize modules and links

const remoteLink = new RemoteLink();

// upsert the relationship
await remoteLink.create({ // one (object) or many (array)
  [Modules.PRODUCT]: {
    variant_id: "var_abc",
  },
  [Modules.INVENTORY]: {
    inventory_item_id: "iitem_abc",
  },
  data: { // optional additional fields
    required_quantity: 5
  }
});

// dismiss (doesn't cascade)
await remoteLink.dismiss({ // one (object) or many (array)
  [Modules.PRODUCT]: {
    variant_id: "var_abc",
  },
  [Modules.INVENTORY]: {
    inventory_item_id: "iitem_abc",
  },
});

// delete
await remoteLink.delete({
  // every key is a module
  [Modules.PRODUCT]: {
    // every key is a linkable field
    variant_id: "var_abc", // single or multiple values
  },
});

// restore
await remoteLink.restore({
  // every key is a module
  [Modules.PRODUCT]: {
    // every key is a linkable field
    variant_id: "var_abc", // single or multiple values
  },
});

```

Co-authored-by: Riqwan Thamir <5105988+riqwan@users.noreply.github.com>

.changeset/poor-ants-deliver.md

@@ -0,0 +1,7 @@
+---
+"@medusajs/link-modules": patch
+"@medusajs/modules-sdk": patch
+"@medusajs/types": patch
+---
+
+Add extra fields to link modules

.changeset/selfish-needles-beg.md

@@ -0,0 +1,9 @@
+---
+"@medusajs/orchestration": minor
+"@medusajs/link-modules": minor
+"@medusajs/modules-sdk": minor
+"@medusajs/types": minor
+"@medusajs/utils": minor
+---
+
+Medusa App Loader

.changeset/warm-bikes-enjoy.md

@@ -0,0 +1,13 @@
+---
+"@medusajs/stock-location": minor
+"@medusajs/orchestration": minor
+"@medusajs/link-modules": minor
+"@medusajs/modules-sdk": minor
+"@medusajs/inventory": minor
+"@medusajs/product": minor
+"@medusajs/medusa": minor
+"@medusajs/types": minor
+"@medusajs/utils": minor
+---
+
+introduce @medusajs/link-modules

integration-tests/plugins/__tests__/link-modules/index.ts

@@ -0,0 +1,188 @@
+import { initialize, runMigrations } from "@medusajs/link-modules"
+import { MedusaModule, ModuleJoinerConfig } from "@medusajs/modules-sdk"
+
+jest.setTimeout(5000000)
+
+const DB_HOST = process.env.DB_HOST
+const DB_USERNAME = process.env.DB_USERNAME
+const DB_PASSWORD = process.env.DB_PASSWORD
+const DB_NAME = process.env.DB_TEMP_NAME
+const DB_URL = `postgres://${DB_USERNAME}:${DB_PASSWORD}@${DB_HOST}/${DB_NAME}`
+
+describe("Link Modules", () => {
+  let links
+  const linkDefinition: ModuleJoinerConfig[] = [
+    {
+      serviceName: "linkServiceName",
+      isLink: true,
+      databaseConfig: {
+        tableName: "linkTableName",
+        idPrefix: "prefix",
+        extraFields: {
+          extra_field: {
+            type: "integer",
+            defaultValue: "-1",
+          },
+          another_field: {
+            type: "string",
+            nullable: true,
+          },
+        },
+      },
+      relationships: [
+        {
+          serviceName: "moduleA",
+          primaryKey: "id",
+          foreignKey: "product_id",
+          alias: "product",
+        },
+        {
+          serviceName: "moduleB",
+          primaryKey: "id",
+          foreignKey: "inventory_item_id",
+          alias: "inventory",
+        },
+      ],
+    },
+  ]
+  const dbConfig = {
+    database: {
+      clientUrl: DB_URL,
+    },
+  }
+
+  beforeAll(async () => {
+    jest.spyOn(MedusaModule, "getLoadedModules").mockImplementation((() => {
+      return [{ moduleA: [{}] }, { moduleB: [{}] }]
+    }) as any)
+
+    await runMigrations({ options: dbConfig }, linkDefinition)
+    links = await initialize(dbConfig, linkDefinition)
+  })
+
+  afterAll(async () => {
+    jest.clearAllMocks()
+  })
+
+  it("Should insert values in a declared link", async function () {
+    // simple
+    await links.linkServiceName.create("modA_id", "modB_id")
+
+    // extra fields
+    await links.linkServiceName.create("123", "abc", {
+      extra_field: 333,
+      another_field: "value**",
+    })
+
+    // bulk
+    await links.linkServiceName.create([
+      ["111", "aaa", { another_field: "test" }],
+      ["222", "bbb"],
+      ["333", "ccc", { extra_field: 2 }],
+      ["444", "bbb"],
+    ])
+
+    const values = await links.linkServiceName.list()
+
+    expect(values).toEqual([
+      {
+        product_id: "modA_id",
+        inventory_item_id: "modB_id",
+        id: expect.stringMatching("prefix_.+"),
+        extra_field: -1,
+        another_field: null,
+        created_at: expect.any(Date),
+        updated_at: expect.any(Date),
+        deleted_at: null,
+      },
+      expect.objectContaining({
+        product_id: "123",
+        inventory_item_id: "abc",
+        id: expect.stringMatching("prefix_.+"),
+        extra_field: 333,
+        another_field: "value**",
+      }),
+      expect.objectContaining({
+        product_id: "111",
+        inventory_item_id: "aaa",
+        extra_field: -1,
+        another_field: "test",
+      }),
+      expect.objectContaining({
+        product_id: "222",
+        inventory_item_id: "bbb",
+        extra_field: -1,
+        another_field: null,
+      }),
+      expect.objectContaining({
+        product_id: "333",
+        inventory_item_id: "ccc",
+        id: expect.stringMatching("prefix_.+"),
+        extra_field: 2,
+      }),
+      expect.objectContaining({
+        product_id: "444",
+        inventory_item_id: "bbb",
+      }),
+    ])
+  })
+
+  it("Should dismiss the link of a given pair of keys", async function () {
+    // simple
+    const dismissSingle = await links.linkServiceName.dismiss(
+      "modA_id",
+      "modB_id"
+    )
+
+    // bulk
+    const dismissMulti = await links.linkServiceName.dismiss([
+      ["111", "aaa"],
+      ["333", "ccc"],
+    ])
+
+    expect(dismissSingle).toEqual([
+      expect.objectContaining({
+        product_id: "modA_id",
+        inventory_item_id: "modB_id",
+        deleted_at: expect.any(Date),
+      }),
+    ])
+
+    expect(dismissMulti).toEqual([
+      expect.objectContaining({
+        product_id: "111",
+        inventory_item_id: "aaa",
+        deleted_at: expect.any(Date),
+      }),
+      expect.objectContaining({
+        product_id: "333",
+        inventory_item_id: "ccc",
+        deleted_at: expect.any(Date),
+      }),
+    ])
+  })
+
+  it("Should delete all the links related to a given key", async function () {
+    await links.linkServiceName.softDelete({
+      inventory_item_id: "bbb",
+    })
+
+    const values = await links.linkServiceName.list(
+      { inventory_item_id: "bbb" },
+      { withDeleted: true }
+    )
+
+    expect(values).toEqual([
+      expect.objectContaining({
+        product_id: "222",
+        inventory_item_id: "bbb",
+        deleted_at: expect.any(Date),
+      }),
+      expect.objectContaining({
+        product_id: "444",
+        inventory_item_id: "bbb",
+        deleted_at: expect.any(Date),
+      }),
+    ])
+  })
+})

packages/cache-inmemory/jest.config.js

@@ -1,12 +1,12 @@
 module.exports = {
-  globals: {
-    "ts-jest": {
-      tsConfig: "tsconfig.spec.json",
-      isolatedModules: false,
-    },
-  },
   transform: {
-    "^.+\\.[jt]s?$": "ts-jest",
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsConfig: "tsconfig.json",
+        isolatedModules: true,
+      },
+    ],
   },
   testEnvironment: `node`,
   moduleFileExtensions: [`js`, `ts`],

packages/cache-inmemory/package.json

@@ -19,10 +19,10 @@
   "devDependencies": {
     "@medusajs/types": "^1.8.8",
     "cross-env": "^5.2.1",
-    "jest": "^25.5.4",
+    "jest": "^29.6.3",
     "rimraf": "^5.0.1",
-    "ts-jest": "^25.5.1",
-    "typescript": "^4.4.4"
+    "ts-jest": "^29.1.1",
+    "typescript": "^5.1.6"
   },
   "scripts": {
     "watch": "tsc --build --watch",

packages/cache-redis/jest.config.js

@@ -1,12 +1,12 @@
 module.exports = {
-  globals: {
-    "ts-jest": {
-      tsConfig: "tsconfig.spec.json",
-      isolatedModules: false,
-    },
-  },
   transform: {
-    "^.+\\.[jt]s?$": "ts-jest",
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsConfig: "tsconfig.json",
+        isolatedModules: true,
+      },
+    ],
   },
   testEnvironment: `node`,
   moduleFileExtensions: [`js`, `ts`],

packages/cache-redis/package.json

@@ -19,10 +19,10 @@
   "devDependencies": {
     "@medusajs/types": "^1.8.8",
     "cross-env": "^5.2.1",
-    "jest": "^25.5.4",
+    "jest": "^29.6.3",
     "rimraf": "^5.0.1",
-    "ts-jest": "^25.5.1",
-    "typescript": "^4.4.4"
+    "ts-jest": "^29.1.1",
+    "typescript": "^5.1.6"
   },
   "scripts": {
     "watch": "tsc --build --watch",

packages/event-bus-local/jest.config.js

@@ -1,13 +1,13 @@
 module.exports = {
-  globals: {
-    "ts-jest": {
-      tsConfig: "tsconfig.spec.json",
-      isolatedModules: false,
-    },
-  },
   transform: {
-    "^.+\\.[jt]s?$": "ts-jest",
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsConfig: "tsconfig.json",
+        isolatedModules: true,
+      },
+    ],
   },
   testEnvironment: `node`,
-  moduleFileExtensions: [`js`, `jsx`, `ts`, `tsx`, `json`],
+  moduleFileExtensions: [`js`, `ts`],
 }

packages/event-bus-local/package.json

@@ -19,10 +19,10 @@
   "devDependencies": {
     "@medusajs/types": "^1.8.10",
     "cross-env": "^5.2.1",
-    "jest": "^25.5.2",
+    "jest": "^29.6.3",
     "rimraf": "^5.0.1",
-    "ts-jest": "^25.5.1",
-    "typescript": "^4.4.4"
+    "ts-jest": "^29.1.1",
+    "typescript": "^5.1.6"
   },
   "scripts": {
     "watch": "tsc --build --watch",

packages/event-bus-redis/jest.config.js

@@ -1,13 +1,13 @@
 module.exports = {
-  globals: {
-    "ts-jest": {
-      tsConfig: "tsconfig.spec.json",
-      isolatedModules: false,
-    },
-  },
   transform: {
-    "^.+\\.[jt]s?$": "ts-jest",
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsConfig: "tsconfig.json",
+        isolatedModules: true,
+      },
+    ],
   },
   testEnvironment: `node`,
-  moduleFileExtensions: [`js`, `jsx`, `ts`, `tsx`, `json`],
+  moduleFileExtensions: [`js`, `ts`],
 }

packages/event-bus-redis/package.json

@@ -19,11 +19,11 @@
   "devDependencies": {
     "@medusajs/types": "^1.8.10",
     "cross-env": "^5.2.1",
-    "jest": "^25.5.2",
+    "jest": "^29.6.3",
     "medusa-test-utils": "^1.1.40",
     "rimraf": "^5.0.1",
-    "ts-jest": "^25.5.1",
-    "typescript": "^4.4.4"
+    "ts-jest": "^29.1.1",
+    "typescript": "^5.1.6"
   },
   "scripts": {
     "watch": "tsc --build --watch",

packages/inventory/jest.config.js

@@ -1,12 +1,12 @@
 module.exports = {
-  globals: {
-    "ts-jest": {
-      tsConfig: "tsconfig.spec.json",
-      isolatedModules: false,
-    },
-  },
   transform: {
-    "^.+\\.[jt]s?$": "ts-jest",
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsConfig: "tsconfig.json",
+        isolatedModules: true,
+      },
+    ],
   },
   testEnvironment: `node`,
   moduleFileExtensions: [`js`, `ts`],

packages/inventory/package.json

@@ -19,10 +19,10 @@
   "devDependencies": {
     "@medusajs/types": "^1.8.11",
     "cross-env": "^5.2.1",
-    "jest": "^25.5.4",
+    "jest": "^29.6.3",
     "rimraf": "^5.0.1",
-    "ts-jest": "^25.5.1",
-    "typescript": "^4.4.4"
+    "ts-jest": "^29.1.1",
+    "typescript": "^5.1.6"
   },
   "dependencies": {
     "@medusajs/modules-sdk": "^1.8.8",

packages/inventory/src/joiner-config.ts

@@ -1,9 +1,14 @@
 import { Modules } from "@medusajs/modules-sdk"
-import { JoinerServiceConfig } from "@medusajs/types"
+import { ModuleJoinerConfig } from "@medusajs/types"
 
-export const joinerConfig: JoinerServiceConfig = {
+export const joinerConfig: ModuleJoinerConfig = {
   serviceName: Modules.INVENTORY,
   primaryKeys: ["id"],
+  linkableKeys: [
+    "inventory_item_id",
+    "inventory_level_id",
+    "reservation_item_id",
+  ],
   alias: [
     {
       name: "inventory_items",

packages/inventory/src/services/inventory.ts

@@ -11,8 +11,8 @@ import {
   IInventoryService,
   InventoryItemDTO,
   InventoryLevelDTO,
-  JoinerServiceConfig,
   MODULE_RESOURCE_TYPE,
+  ModuleJoinerConfig,
   ReservationItemDTO,
   SharedContext,
   UpdateInventoryLevelInput,
@@ -59,7 +59,7 @@ export default class InventoryService implements IInventoryService {
     this.reservationItemService_ = reservationItemService
   }
 
-  __joinerConfig(): JoinerServiceConfig {
+  __joinerConfig(): ModuleJoinerConfig {
     return joinerConfig
   }
 

packages/link-modules/.gitignore

@@ -0,0 +1,6 @@
+/dist
+node_modules
+.DS_store
+.env*
+.env
+*.sql

packages/link-modules/jest.config.js

@@ -0,0 +1,13 @@
+module.exports = {
+  transform: {
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsConfig: "tsconfig.json",
+        isolatedModules: true,
+      },
+    ],
+  },
+  testEnvironment: `node`,
+  moduleFileExtensions: [`js`, `ts`],
+}

packages/link-modules/package.json

@@ -0,0 +1,46 @@
+{
+  "name": "@medusajs/link-modules",
+  "version": "0.0.1",
+  "description": "Medusa Default Link Modules Package and Definitions",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "files": [
+    "dist"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/medusajs/medusa",
+    "directory": "packages/link-modules"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "author": "Medusa",
+  "license": "MIT",
+  "scripts": {
+    "watch": "tsc --build --watch",
+    "watch:test": "tsc --build tsconfig.spec.json --watch",
+    "prepare": "cross-env NODE_ENV=production yarn run build",
+    "build": "rimraf dist && tsc --build && tsc-alias -p tsconfig.json",
+    "test": "jest --passWithNoTests --runInBand --bail --forceExit",
+    "test:integration": "jest --passWithNoTests"
+  },
+  "devDependencies": {
+    "cross-env": "^5.2.1",
+    "jest": "^29.6.3",
+    "pg-god": "^1.0.12",
+    "rimraf": "^5.0.1",
+    "ts-jest": "^29.1.1",
+    "ts-node": "^10.9.1",
+    "tsc-alias": "^1.8.6",
+    "typescript": "^5.1.6"
+  },
+  "dependencies": {
+    "@medusajs/modules-sdk": "^1.8.8",
+    "@medusajs/types": "^1.8.11",
+    "@medusajs/utils": "^1.9.2",
+    "@mikro-orm/core": "5.7.12",
+    "@mikro-orm/postgresql": "5.7.12",
+    "awilix": "^8.0.0"
+  }
+}

packages/link-modules/src/definitions/index.ts

@@ -0,0 +1,2 @@
+export * from "./inventory-level-stock-location"
+export * from "./product-variant-inventory-item"

packages/link-modules/src/definitions/inventory-level-stock-location.ts

@@ -0,0 +1,19 @@
+import { ModuleJoinerConfig } from "@medusajs/types"
+import { Modules } from "@medusajs/modules-sdk"
+
+export const InventoryLevelStockLocation: ModuleJoinerConfig = {
+  isLink: true,
+  isReadOnlyLink: true,
+  extends: [
+    {
+      serviceName: Modules.INVENTORY,
+      relationship: {
+        serviceName: Modules.STOCK_LOCATION,
+        primaryKey: "id",
+        foreignKey: "location_id",
+        alias: "stock_locations",
+        isList: true,
+      },
+    },
+  ],
+}

packages/link-modules/src/definitions/product-variant-inventory-item.ts

@@ -0,0 +1,66 @@
+import { Modules } from "@medusajs/modules-sdk"
+import { ModuleJoinerConfig } from "@medusajs/types"
+import { LINKS } from "../links"
+
+export const ProductVariantInventoryItem: ModuleJoinerConfig = {
+  serviceName: LINKS.ProductVariantInventoryItem,
+  isLink: true,
+  databaseConfig: {
+    tableName: "product_variant_inventory_item",
+    idPrefix: "pvitem",
+    extraFields: {
+      required_quantity: {
+        type: "integer",
+        defaultValue: "1",
+      },
+    },
+  },
+  alias: [
+    {
+      name: "product_variant_inventory_item",
+    },
+    {
+      name: "product_variant_inventory_items",
+    },
+  ],
+  primaryKeys: ["id", "variant_id", "inventory_item_id"],
+  relationships: [
+    {
+      serviceName: Modules.PRODUCT,
+      primaryKey: "id",
+      foreignKey: "variant_id",
+      alias: "variant",
+      args: {
+        methodSuffix: "Variants",
+      },
+    },
+    {
+      serviceName: Modules.INVENTORY,
+      primaryKey: "id",
+      foreignKey: "inventory_item_id",
+      alias: "inventory",
+      deleteCascade: true,
+    },
+  ],
+  extends: [
+    {
+      serviceName: Modules.PRODUCT,
+      relationship: {
+        serviceName: LINKS.ProductVariantInventoryItem,
+        primaryKey: "variant_id",
+        foreignKey: "id",
+        alias: "inventory_items",
+        isList: true,
+      },
+    },
+    {
+      serviceName: Modules.INVENTORY,
+      relationship: {
+        serviceName: LINKS.ProductVariantInventoryItem,
+        primaryKey: "inventory_item_id",
+        foreignKey: "id",
+        alias: "variant_link",
+      },
+    },
+  ],
+}

packages/link-modules/src/index.ts

@@ -0,0 +1,4 @@
+export * from "./initialize"
+export * from "./types"
+export * from "./loaders"
+export * from "./services"

packages/link-modules/src/initialize/index.ts

@@ -0,0 +1,190 @@
+import { InternalModuleDeclaration, MedusaModule } from "@medusajs/modules-sdk"
+import {
+  ExternalModuleDeclaration,
+  ILinkModule,
+  LinkModuleDefinition,
+  LoaderOptions,
+  MODULE_RESOURCE_TYPE,
+  MODULE_SCOPE,
+  ModuleExports,
+  ModuleJoinerConfig,
+  ModuleServiceInitializeCustomDataLayerOptions,
+  ModuleServiceInitializeOptions,
+} from "@medusajs/types"
+import {
+  ContainerRegistrationKeys,
+  lowerCaseFirst,
+  simpleHash,
+} from "@medusajs/utils"
+import * as linkDefinitions from "../definitions"
+import { getMigration } from "../migration"
+import { InitializeModuleInjectableDependencies } from "../types"
+import { composeLinkName } from "../utils"
+import { getLinkModuleDefinition } from "./module-definition"
+
+export const initialize = async (
+  options?:
+    | ModuleServiceInitializeOptions
+    | ModuleServiceInitializeCustomDataLayerOptions
+    | ExternalModuleDeclaration
+    | InternalModuleDeclaration,
+  modulesDefinition?: ModuleJoinerConfig[],
+  injectedDependencies?: InitializeModuleInjectableDependencies
+): Promise<{ [link: string]: ILinkModule }> => {
+  const allLinks = {}
+  const modulesLoadedKeys = MedusaModule.getLoadedModules().map(
+    (mod) => Object.keys(mod)[0]
+  )
+
+  const allLinksToLoad = Object.values(linkDefinitions).concat(
+    modulesDefinition ?? []
+  )
+
+  for (const linkDefinition of allLinksToLoad) {
+    const definition = JSON.parse(JSON.stringify(linkDefinition))
+
+    const [primary, foreign] = definition.relationships ?? []
+
+    if (definition.relationships?.length !== 2 && !definition.isReadOnlyLink) {
+      throw new Error(
+        `Link module ${definition.serviceName} can only link 2 modules.`
+      )
+    } else if (
+      foreign?.foreignKey?.split(",").length > 1 &&
+      !definition.isReadOnlyLink
+    ) {
+      throw new Error(`Foreign key cannot be a composed key.`)
+    }
+
+    const serviceKey = !definition.isReadOnlyLink
+      ? lowerCaseFirst(
+          definition.serviceName ??
+            composeLinkName(
+              primary.serviceName,
+              primary.foreignKey,
+              foreign.serviceName,
+              foreign.foreignKey
+            )
+        )
+      : simpleHash(JSON.stringify(definition.extends))
+
+    if (modulesLoadedKeys.includes(serviceKey)) {
+      continue
+    } else if (serviceKey in allLinks) {
+      throw new Error(`Link module ${serviceKey} already defined.`)
+    }
+
+    if (definition.isReadOnlyLink) {
+      const extended: any[] = []
+      for (const extension of definition.extends ?? []) {
+        if (
+          modulesLoadedKeys.includes(extension.serviceName) &&
+          modulesLoadedKeys.includes(extension.relationship.serviceName)
+        ) {
+          extended.push(extension)
+        }
+      }
+
+      definition.extends = extended
+      if (extended.length === 0) {
+        continue
+      }
+    } else if (
+      !modulesLoadedKeys.includes(primary.serviceName) ||
+      !modulesLoadedKeys.includes(foreign.serviceName)
+    ) {
+      // TODO: This should be uncommented when all modules are done
+      // continue
+    }
+
+    const moduleDefinition = getLinkModuleDefinition(
+      definition,
+      primary,
+      foreign
+    ) as ModuleExports
+
+    const linkModuleDefinition: LinkModuleDefinition = {
+      key: serviceKey,
+      registrationName: serviceKey,
+      label: serviceKey,
+      defaultModuleDeclaration: {
+        scope: MODULE_SCOPE.INTERNAL,
+        resources: injectedDependencies?.[
+          ContainerRegistrationKeys.PG_CONNECTION
+        ]
+          ? MODULE_RESOURCE_TYPE.SHARED
+          : MODULE_RESOURCE_TYPE.ISOLATED,
+      },
+    }
+
+    const loaded = await MedusaModule.bootstrapLink(
+      linkModuleDefinition,
+      options as InternalModuleDeclaration,
+      moduleDefinition,
+      injectedDependencies
+    )
+
+    allLinks[serviceKey as string] = Object.values(loaded)[0]
+  }
+
+  return allLinks
+}
+
+export async function runMigrations(
+  {
+    options,
+    logger,
+  }: Omit<LoaderOptions<ModuleServiceInitializeOptions>, "container">,
+  modulesDefinition?: ModuleJoinerConfig[]
+) {
+  const modulesLoadedKeys = MedusaModule.getLoadedModules().map(
+    (mod) => Object.keys(mod)[0]
+  )
+
+  const allLinksToLoad = Object.values(linkDefinitions).concat(
+    modulesDefinition ?? []
+  )
+
+  const allLinks = new Set<string>()
+  for (const definition of allLinksToLoad) {
+    if (definition.isReadOnlyLink) {
+      continue
+    }
+
+    if (definition.relationships?.length !== 2) {
+      throw new Error(
+        `Link module ${definition.serviceName} must have 2 relationships.`
+      )
+    }
+
+    const [primary, foreign] = definition.relationships ?? []
+    const serviceKey = lowerCaseFirst(
+      definition.serviceName ??
+        composeLinkName(
+          primary.serviceName,
+          primary.foreignKey,
+          foreign.serviceName,
+          foreign.foreignKey
+        )
+    )
+
+    if (modulesLoadedKeys.includes(serviceKey)) {
+      continue
+    } else if (allLinks.has(serviceKey)) {
+      throw new Error(`Link module ${serviceKey} already exists.`)
+    }
+
+    allLinks.add(serviceKey)
+
+    if (
+      !modulesLoadedKeys.includes(primary.serviceName) ||
+      !modulesLoadedKeys.includes(foreign.serviceName)
+    ) {
+      // TODO: This should be uncommented when all modules are done
+      // continue
+    }
+
+    const migrate = getMigration(definition, serviceKey, primary, foreign)
+    await migrate({ options, logger })
+  }
+}

packages/link-modules/src/initialize/module-definition.ts

@@ -0,0 +1,24 @@
+import {
+  JoinerRelationship,
+  ModuleExports,
+  ModuleJoinerConfig,
+} from "@medusajs/types"
+import { getModuleService, getReadOnlyModuleService } from "@services"
+import { getLoaders } from "../loaders"
+
+export function getLinkModuleDefinition(
+  joinerConfig: ModuleJoinerConfig,
+  primary: JoinerRelationship,
+  foreign: JoinerRelationship
+): ModuleExports {
+  return {
+    service: joinerConfig.isReadOnlyLink
+      ? getReadOnlyModuleService(joinerConfig)
+      : getModuleService(joinerConfig),
+    loaders: getLoaders({
+      joinerConfig,
+      primary,
+      foreign,
+    }),
+  }
+}

packages/link-modules/src/links.ts

@@ -0,0 +1,11 @@
+import { Modules } from "@medusajs/modules-sdk"
+import { composeLinkName } from "./utils"
+
+export const LINKS = {
+  ProductVariantInventoryItem: composeLinkName(
+    Modules.PRODUCT,
+    "variant_id",
+    Modules.INVENTORY,
+    "inventory_item_id"
+  ),
+}

packages/link-modules/src/loaders/connection.ts

@@ -0,0 +1,31 @@
+import {
+  InternalModuleDeclaration,
+  LoaderOptions,
+  ModuleServiceInitializeCustomDataLayerOptions,
+  ModuleServiceInitializeOptions,
+} from "@medusajs/modules-sdk"
+import { ModulesSdkUtils } from "@medusajs/utils"
+
+import { EntitySchema } from "@mikro-orm/core"
+
+export function connectionLoader(entity: EntitySchema) {
+  return async (
+    {
+      options,
+      container,
+      logger,
+    }: LoaderOptions<
+      | ModuleServiceInitializeOptions
+      | ModuleServiceInitializeCustomDataLayerOptions
+    >,
+    moduleDeclaration?: InternalModuleDeclaration
+  ): Promise<void> => {
+    await ModulesSdkUtils.mikroOrmConnectionLoader({
+      entities: [entity],
+      container,
+      options,
+      moduleDeclaration,
+      logger,
+    })
+  }
+}

packages/link-modules/src/loaders/container.ts

@@ -0,0 +1,40 @@
+import { BaseRepository, getLinkRepository } from "@repositories"
+import { LinkService, getModuleService } from "@services"
+
+import { LoaderOptions } from "@medusajs/modules-sdk"
+import {
+  InternalModuleDeclaration,
+  ModuleJoinerConfig,
+  ModulesSdkTypes,
+} from "@medusajs/types"
+import { asClass, asValue } from "awilix"
+
+export function containerLoader(entity, joinerConfig: ModuleJoinerConfig) {
+  return async (
+    {
+      options,
+      container,
+    }: LoaderOptions<
+      | ModulesSdkTypes.ModuleServiceInitializeOptions
+      | ModulesSdkTypes.ModuleServiceInitializeCustomDataLayerOptions
+    >,
+    moduleDeclaration?: InternalModuleDeclaration
+  ): Promise<void> => {
+    const [primary, foreign] = joinerConfig.relationships!
+
+    container.register({
+      joinerConfig: asValue(joinerConfig),
+      primaryKey: asValue(primary.foreignKey.split(",")),
+      foreignKey: asValue(foreign.foreignKey),
+      extraFields: asValue(
+        Object.keys(joinerConfig.databaseConfig?.extraFields || {})
+      ),
+
+      linkModuleService: asClass(getModuleService(joinerConfig)).singleton(),
+      linkService: asClass(LinkService).singleton(),
+
+      baseRepository: asClass(BaseRepository).singleton(),
+      linkRepository: asClass(getLinkRepository(entity)).singleton(),
+    })
+  }
+}

packages/link-modules/src/loaders/index.ts

@@ -0,0 +1,26 @@
+import {
+  JoinerRelationship,
+  ModuleJoinerConfig,
+  ModuleLoaderFunction,
+} from "@medusajs/types"
+
+import { generateEntity } from "../utils"
+import { connectionLoader } from "./connection"
+import { containerLoader } from "./container"
+
+export function getLoaders({
+  joinerConfig,
+  primary,
+  foreign,
+}: {
+  joinerConfig: ModuleJoinerConfig
+  primary: JoinerRelationship
+  foreign: JoinerRelationship
+}): ModuleLoaderFunction[] {
+  if (joinerConfig.isReadOnlyLink) {
+    return []
+  }
+
+  const entity = generateEntity(joinerConfig, primary, foreign)
+  return [connectionLoader(entity), containerLoader(entity, joinerConfig)]
+}

packages/link-modules/src/migration/index.ts

@@ -0,0 +1,78 @@
+import {
+  JoinerRelationship,
+  LoaderOptions,
+  Logger,
+  ModuleJoinerConfig,
+  ModuleServiceInitializeOptions,
+} from "@medusajs/types"
+import { generateEntity } from "../utils"
+
+import { DALUtils, ModulesSdkUtils } from "@medusajs/utils"
+
+export function getMigration(
+  joinerConfig: ModuleJoinerConfig,
+  serviceName: string,
+  primary: JoinerRelationship,
+  foreign: JoinerRelationship
+) {
+  return async function runMigrations(
+    {
+      options,
+      logger,
+    }: Pick<
+      LoaderOptions<ModuleServiceInitializeOptions>,
+      "options" | "logger"
+    > = {} as any
+  ) {
+    logger ??= console as unknown as Logger
+
+    const dbData = ModulesSdkUtils.loadDatabaseConfig("link_modules", options)
+    const entity = generateEntity(joinerConfig, primary, foreign)
+
+    const orm = await DALUtils.mikroOrmCreateConnection(dbData, [entity])
+
+    const tableName = entity.meta.collection
+
+    let hasTable = false
+    try {
+      await orm.em.getConnection().execute(`SELECT 1 FROM ${tableName} LIMIT 0`)
+      hasTable = true
+    } catch {}
+
+    const generator = orm.getSchemaGenerator()
+    if (hasTable) {
+      const updateSql = await generator.getUpdateSchemaSQL()
+      const entityUpdates = updateSql
+        .split(";")
+        .map((sql) => sql.trim())
+        .filter((sql) =>
+          sql.toLowerCase().includes(`alter table "${tableName.toLowerCase()}"`)
+        )
+
+      if (entityUpdates.length > 0) {
+        try {
+          await generator.execute(entityUpdates.join(";"))
+          logger.info(`Link module "${serviceName}" migration executed`)
+        } catch (error) {
+          logger.error(
+            `Link module "${serviceName}" migration failed to run - Error: ${error}`
+          )
+        }
+      } else {
+        logger.info(`Skipping "${tableName}" migration.`)
+      }
+    } else {
+      try {
+        await generator.createSchema()
+
+        logger.info(`Link module "${serviceName}" migration executed`)
+      } catch (error) {
+        logger.error(
+          `Link module "${serviceName}" migration failed to run - Error: ${error}`
+        )
+      }
+    }
+
+    await orm.close()
+  }
+}

packages/link-modules/src/repositories/index.ts

@@ -0,0 +1,2 @@
+export { MikroOrmBaseRepository as BaseRepository } from "@medusajs/utils"
+export { getLinkRepository } from "./link"

packages/link-modules/src/repositories/link.ts

@@ -0,0 +1,104 @@
+import { Context, FindOptions, ModuleJoinerConfig } from "@medusajs/types"
+import {
+  EntitySchema,
+  LoadStrategy,
+  FilterQuery as MikroFilterQuery,
+  FindOptions as MikroOptions,
+} from "@mikro-orm/core"
+
+import {
+  MikroOrmAbstractBaseRepository,
+  generateEntityId,
+} from "@medusajs/utils"
+import { SqlEntityManager } from "@mikro-orm/postgresql"
+
+export function getLinkRepository(model: EntitySchema) {
+  return class LinkRepository extends MikroOrmAbstractBaseRepository<object> {
+    readonly manager_: SqlEntityManager
+    readonly model_: EntitySchema
+    readonly joinerConfig_: ModuleJoinerConfig
+
+    constructor({
+      manager,
+      joinerConfig,
+    }: {
+      manager: SqlEntityManager
+      joinerConfig: ModuleJoinerConfig
+    }) {
+      // @ts-ignore
+      super(...arguments)
+      this.manager_ = manager
+      this.model_ = model
+      this.joinerConfig_ = joinerConfig
+    }
+
+    async find(
+      findOptions: FindOptions<unknown> = { where: {} },
+      context: Context = {}
+    ): Promise<unknown[]> {
+      const manager = this.getActiveManager<SqlEntityManager>(context)
+
+      const findOptions_ = { ...findOptions }
+      findOptions_.options ??= {}
+
+      Object.assign(findOptions_.options, {
+        strategy: LoadStrategy.SELECT_IN,
+      })
+
+      return await manager.find(
+        this.model_,
+        findOptions_.where as MikroFilterQuery<unknown>,
+        findOptions_.options as MikroOptions<any>
+      )
+    }
+
+    async findAndCount(
+      findOptions: FindOptions<object> = { where: {} },
+      context: Context = {}
+    ): Promise<[object[], number]> {
+      const manager = this.getActiveManager<SqlEntityManager>(context)
+
+      const findOptions_ = { ...findOptions }
+      findOptions_.options ??= {}
+
+      Object.assign(findOptions_.options, {
+        strategy: LoadStrategy.SELECT_IN,
+      })
+
+      return await manager.findAndCount(
+        this.model_,
+        findOptions_.where as MikroFilterQuery<unknown>,
+        findOptions_.options as MikroOptions<any>
+      )
+    }
+
+    async delete(data: any, context: Context = {}): Promise<void> {
+      const filter = {}
+      for (const key in data) {
+        filter[key] = {
+          $in: Array.isArray(data[key]) ? data[key] : [data[key]],
+        }
+      }
+
+      const manager = this.getActiveManager<SqlEntityManager>(context)
+      await manager.nativeDelete(this.model_, data, {})
+    }
+
+    async create(data: object[], context: Context = {}): Promise<object[]> {
+      const manager = this.getActiveManager<SqlEntityManager>(context)
+
+      const links = data.map((link: any) => {
+        link.id = generateEntityId(
+          link.id,
+          this.joinerConfig_.databaseConfig?.idPrefix ?? "link"
+        )
+
+        return manager.create(this.model_, link)
+      })
+
+      await manager.upsertMany(this.model_, links)
+
+      return links
+    }
+  }
+}

packages/link-modules/src/services/dynamic-service-class.ts

@@ -0,0 +1,22 @@
+import { Constructor, ILinkModule, ModuleJoinerConfig } from "@medusajs/types"
+import { LinkModuleService } from "@services"
+
+export function getModuleService(
+  joinerConfig: ModuleJoinerConfig
+): Constructor<ILinkModule> {
+  const joinerConfig_ = JSON.parse(JSON.stringify(joinerConfig))
+  delete joinerConfig_.databaseConfig
+  return class LinkService extends LinkModuleService<unknown> {
+    override __joinerConfig(): ModuleJoinerConfig {
+      return joinerConfig_ as ModuleJoinerConfig
+    }
+  }
+}
+
+export function getReadOnlyModuleService(joinerConfig: ModuleJoinerConfig) {
+  return class ReadOnlyLinkService {
+    __joinerConfig(): ModuleJoinerConfig {
+      return joinerConfig as ModuleJoinerConfig
+    }
+  }
+}

packages/link-modules/src/services/index.ts

@@ -0,0 +1,3 @@
+export * from "./dynamic-service-class"
+export { default as LinkService } from "./link"
+export { default as LinkModuleService } from "./link-module-service"

packages/link-modules/src/services/link-module-service.ts

@@ -0,0 +1,301 @@
+import {
+  Context,
+  DAL,
+  FindConfig,
+  ILinkModule,
+  InternalModuleDeclaration,
+  ModuleJoinerConfig,
+  RestoreReturn,
+  SoftDeleteReturn,
+} from "@medusajs/types"
+import {
+  InjectManager,
+  InjectTransactionManager,
+  MapToConfig,
+  MedusaContext,
+  MedusaError,
+  ModulesSdkUtils,
+  mapObjectTo,
+} from "@medusajs/utils"
+import { LinkService } from "@services"
+import { shouldForceTransaction } from "../utils"
+
+type InjectedDependencies = {
+  baseRepository: DAL.RepositoryService
+  linkService: LinkService<any>
+  primaryKey: string | string[]
+  foreignKey: string
+  extraFields: string[]
+}
+
+export default class LinkModuleService<TLink> implements ILinkModule {
+  protected baseRepository_: DAL.RepositoryService
+  protected readonly linkService_: LinkService<TLink>
+  protected primaryKey_: string[]
+  protected foreignKey_: string
+  protected extraFields_: string[]
+
+  constructor(
+    {
+      baseRepository,
+      linkService,
+      primaryKey,
+      foreignKey,
+      extraFields,
+    }: InjectedDependencies,
+    readonly moduleDeclaration: InternalModuleDeclaration
+  ) {
+    this.baseRepository_ = baseRepository
+    this.linkService_ = linkService
+    this.primaryKey_ = !Array.isArray(primaryKey) ? [primaryKey] : primaryKey
+    this.foreignKey_ = foreignKey
+    this.extraFields_ = extraFields
+  }
+
+  __joinerConfig(): ModuleJoinerConfig {
+    return {} as ModuleJoinerConfig
+  }
+
+  private buildData(
+    primaryKeyData: string | string[],
+    foreignKeyData: string,
+    extra: Record<string, unknown> = {}
+  ) {
+    if (this.primaryKey_.length > 1) {
+      if (
+        !Array.isArray(primaryKeyData) ||
+        primaryKeyData.length !== this.primaryKey_.length
+      ) {
+        throw new MedusaError(
+          MedusaError.Types.INVALID_DATA,
+          `Primary key data must be an array ${this.primaryKey_.length} values`
+        )
+      }
+    }
+
+    const pk = this.primaryKey_.join(",")
+    return {
+      [pk]: primaryKeyData,
+      [this.foreignKey_]: foreignKeyData,
+      ...extra,
+    }
+  }
+
+  private isValidKeyName(name: string) {
+    return this.primaryKey_.concat(this.foreignKey_).includes(name)
+  }
+
+  private validateFields(data: any) {
+    const keys = Object.keys(data)
+    if (!keys.every((k) => this.isValidKeyName(k))) {
+      throw new MedusaError(
+        MedusaError.Types.INVALID_DATA,
+        `Invalid field name provided. Valid field names are ${this.primaryKey_.concat(
+          this.foreignKey_
+        )}`
+      )
+    }
+  }
+
+  @InjectManager("baseRepository_")
+  async retrieve(
+    primaryKeyData: string | string[],
+    foreignKeyData: string,
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<unknown> {
+    const filter = this.buildData(primaryKeyData, foreignKeyData)
+    const queryOptions = ModulesSdkUtils.buildQuery<unknown>(filter)
+    const entry = await this.linkService_.list(queryOptions, {}, sharedContext)
+
+    if (!entry?.length) {
+      const pk = this.primaryKey_.join(",")
+      const errMessage = `${pk}[${primaryKeyData}] and ${this.foreignKey_}[${foreignKeyData}]`
+
+      throw new MedusaError(
+        MedusaError.Types.NOT_FOUND,
+        `Entry ${errMessage} was not found`
+      )
+    }
+
+    return entry[0]
+  }
+
+  @InjectManager("baseRepository_")
+  async list(
+    filters: Record<string, unknown> = {},
+    config: FindConfig<unknown> = {},
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<unknown[]> {
+    const rows = await this.linkService_.list(filters, config, sharedContext)
+
+    return await this.baseRepository_.serialize<object[]>(rows)
+  }
+
+  @InjectManager("baseRepository_")
+  async listAndCount(
+    filters: Record<string, unknown> = {},
+    config: FindConfig<unknown> = {},
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<[unknown[], number]> {
+    const [rows, count] = await this.linkService_.listAndCount(
+      filters,
+      config,
+      sharedContext
+    )
+
+    return [await this.baseRepository_.serialize<object[]>(rows), count]
+  }
+
+  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
+  async create(
+    primaryKeyOrBulkData:
+      | string
+      | string[]
+      | [string | string[], string, Record<string, unknown>][],
+    foreignKeyData?: string,
+    extraFields?: Record<string, unknown>,
+    @MedusaContext() sharedContext: Context = {}
+  ) {
+    const data: unknown[] = []
+    if (foreignKeyData === undefined && Array.isArray(primaryKeyOrBulkData)) {
+      for (const [primaryKey, foreignKey, extra] of primaryKeyOrBulkData) {
+        data.push(
+          this.buildData(
+            primaryKey as string | string[],
+            foreignKey as string,
+            extra as Record<string, unknown>
+          )
+        )
+      }
+    } else {
+      data.push(
+        this.buildData(
+          primaryKeyOrBulkData as string | string[],
+          foreignKeyData!,
+          extraFields
+        )
+      )
+    }
+
+    const links = await this.linkService_.create(data, sharedContext)
+
+    return await this.baseRepository_.serialize<object[]>(links)
+  }
+
+  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
+  async dismiss(
+    primaryKeyOrBulkData: string | string[] | [string | string[], string][],
+    foreignKeyData?: string,
+    @MedusaContext() sharedContext: Context = {}
+  ) {
+    const data: unknown[] = []
+    if (foreignKeyData === undefined && Array.isArray(primaryKeyOrBulkData)) {
+      for (const [primaryKey, foreignKey] of primaryKeyOrBulkData) {
+        data.push(this.buildData(primaryKey, foreignKey as string))
+      }
+    } else {
+      data.push(
+        this.buildData(
+          primaryKeyOrBulkData as string | string[],
+          foreignKeyData!
+        )
+      )
+    }
+
+    const links = await this.linkService_.dismiss(data, sharedContext)
+
+    return await this.baseRepository_.serialize<object[]>(links)
+  }
+
+  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
+  async delete(
+    data: any,
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<void> {
+    this.validateFields(data)
+
+    await this.linkService_.delete(data, sharedContext)
+  }
+
+  async softDelete(
+    data: any,
+    { returnLinkableKeys }: SoftDeleteReturn = {},
+    sharedContext: Context = {}
+  ): Promise<Record<string, unknown[]> | void> {
+    this.validateFields(data)
+
+    let [, cascadedEntitiesMap] = await this.softDelete_(data, sharedContext)
+
+    const pk = this.primaryKey_.join(",")
+    const entityNameToLinkableKeysMap: MapToConfig = {
+      LinkModel: [
+        { mapTo: pk, valueFrom: pk },
+        { mapTo: this.foreignKey_, valueFrom: this.foreignKey_ },
+      ],
+    }
+
+    let mappedCascadedEntitiesMap
+    if (returnLinkableKeys) {
+      // Map internal table/column names to their respective external linkable keys
+      // eg: product.id = product_id, variant.id = variant_id
+      mappedCascadedEntitiesMap = mapObjectTo<Record<string, string[]>>(
+        cascadedEntitiesMap,
+        entityNameToLinkableKeysMap,
+        {
+          pick: returnLinkableKeys,
+        }
+      )
+    }
+
+    return mappedCascadedEntitiesMap ? mappedCascadedEntitiesMap : void 0
+  }
+
+  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
+  protected async softDelete_(
+    data: any,
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<[string[], Record<string, string[]>]> {
+    return await this.linkService_.softDelete(data, sharedContext)
+  }
+
+  async restore(
+    data: any,
+    { returnLinkableKeys }: RestoreReturn = {},
+    sharedContext: Context = {}
+  ): Promise<Record<string, unknown[]> | void> {
+    this.validateFields(data)
+
+    let [, cascadedEntitiesMap] = await this.restore_(data, sharedContext)
+
+    const pk = this.primaryKey_.join(",")
+    const entityNameToLinkableKeysMap: MapToConfig = {
+      LinkModel: [
+        { mapTo: pk, valueFrom: pk },
+        { mapTo: this.foreignKey_, valueFrom: this.foreignKey_ },
+      ],
+    }
+
+    let mappedCascadedEntitiesMap
+    if (returnLinkableKeys) {
+      // Map internal table/column names to their respective external linkable keys
+      // eg: product.id = product_id, variant.id = variant_id
+      mappedCascadedEntitiesMap = mapObjectTo<Record<string, string[]>>(
+        cascadedEntitiesMap,
+        entityNameToLinkableKeysMap,
+        {
+          pick: returnLinkableKeys,
+        }
+      )
+    }
+
+    return mappedCascadedEntitiesMap ? mappedCascadedEntitiesMap : void 0
+  }
+
+  @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
+  async restore_(
+    data: any,
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<[string[], Record<string, string[]>]> {
+    return await this.linkService_.restore(data, sharedContext)
+  }
+}

packages/link-modules/src/services/link.ts

@@ -0,0 +1,117 @@
+import { Context, FindConfig } from "@medusajs/types"
+import {
+  InjectManager,
+  InjectTransactionManager,
+  MedusaContext,
+  ModulesSdkUtils,
+} from "@medusajs/utils"
+import { doNotForceTransaction } from "../utils"
+
+type InjectedDependencies = {
+  linkRepository: any
+}
+
+export default class LinkService<TEntity> {
+  protected readonly linkRepository_: any
+
+  constructor({ linkRepository }: InjectedDependencies) {
+    this.linkRepository_ = linkRepository
+  }
+
+  @InjectManager("linkRepository_")
+  async list(
+    filters: unknown = {},
+    config: FindConfig<unknown> = {},
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<TEntity[]> {
+    const queryOptions = ModulesSdkUtils.buildQuery<unknown>(
+      filters as any,
+      config
+    )
+    return await this.linkRepository_.find(queryOptions, sharedContext)
+  }
+
+  @InjectManager("linkRepository_")
+  async listAndCount(
+    filters = {},
+    config: FindConfig<unknown> = {},
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<[TEntity[], number]> {
+    const queryOptions = ModulesSdkUtils.buildQuery<unknown>(filters, config)
+    return await this.linkRepository_.findAndCount(queryOptions, sharedContext)
+  }
+
+  @InjectTransactionManager(doNotForceTransaction, "linkRepository_")
+  async create(
+    data: unknown[],
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<TEntity[]> {
+    return await this.linkRepository_.create(data, {
+      transactionManager: sharedContext.transactionManager,
+    })
+  }
+
+  @InjectTransactionManager(doNotForceTransaction, "linkRepository_")
+  async dismiss(
+    data: unknown[],
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<TEntity[]> {
+    const filter: any = []
+    for (const pair of data) {
+      filter.push({
+        $and: Object.entries(pair as object).map(([key, value]) => ({
+          [key]: value,
+        })),
+      })
+    }
+
+    const [rows] = await this.linkRepository_.softDelete(
+      { $or: filter },
+      {
+        transactionManager: sharedContext.transactionManager,
+      }
+    )
+
+    return rows
+  }
+
+  @InjectTransactionManager(doNotForceTransaction, "linkRepository_")
+  async delete(
+    data: unknown,
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<void> {
+    await this.linkRepository_.delete(data, {
+      transactionManager: sharedContext.transactionManager,
+    })
+  }
+
+  @InjectTransactionManager(doNotForceTransaction, "linkRepository_")
+  async softDelete(
+    data: any,
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<[string[], Record<string, string[]>]> {
+    const filter = {}
+    for (const key in data) {
+      filter[key] = { $in: Array.isArray(data[key]) ? data[key] : [data[key]] }
+    }
+
+    return await this.linkRepository_.softDelete(filter, {
+      transactionManager: sharedContext.transactionManager,
+    })
+  }
+
+  @InjectTransactionManager(doNotForceTransaction, "linkRepository_")
+  async restore(
+    data: any,
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<[string[], Record<string, string[]>]> {
+    const filter = {}
+    for (const key in data) {
+      filter[key] = { $in: Array.isArray(data[key]) ? data[key] : [data[key]] }
+    }
+
+    return await this.linkRepository_.restore(data, {
+      transactionManager: sharedContext.transactionManager,
+    })
+  }
+}

packages/link-modules/src/types/index.ts

@@ -0,0 +1,5 @@
+import { Logger } from "@medusajs/types"
+
+export type InitializeModuleInjectableDependencies = {
+  logger?: Logger
+}

packages/link-modules/src/utils/compose-link-name.ts

@@ -0,0 +1,9 @@
+import { lowerCaseFirst, toPascalCase } from "@medusajs/utils"
+
+export const composeLinkName = (...args) => {
+  return lowerCaseFirst(toPascalCase(composeTableName(...args.concat("link"))))
+}
+
+export const composeTableName = (...args) => {
+  return args.map((name) => name.replace(/(_id|Service)$/gi, "")).join("_")
+}

packages/link-modules/src/utils/generate-entity.ts

@@ -0,0 +1,110 @@
+import { JoinerRelationship, ModuleJoinerConfig } from "@medusajs/types"
+import {
+  SoftDeletableFilterKey,
+  mikroOrmSoftDeletableFilterOptions,
+  simpleHash,
+} from "@medusajs/utils"
+
+import { EntitySchema } from "@mikro-orm/core"
+import { composeTableName } from "./compose-link-name"
+
+function getClass(...properties) {
+  return class LinkModel {
+    constructor(...values) {
+      properties.forEach((name, idx) => {
+        this[name] = values[idx]
+      })
+    }
+  }
+}
+
+export function generateEntity(
+  joinerConfig: ModuleJoinerConfig,
+  primary: JoinerRelationship,
+  foreign: JoinerRelationship
+) {
+  const fieldNames = primary.foreignKey.split(",").concat(foreign.foreignKey)
+
+  const tableName =
+    joinerConfig.databaseConfig?.tableName ??
+    composeTableName(
+      primary.serviceName,
+      primary.foreignKey,
+      foreign.serviceName,
+      foreign.foreignKey
+    )
+
+  const fields = fieldNames.reduce((acc, curr) => {
+    acc[curr] = {
+      type: "string",
+      nullable: false,
+      primary: true,
+    }
+    return acc
+  }, {})
+
+  const extraFields = joinerConfig.databaseConfig?.extraFields ?? {}
+
+  for (const column in extraFields) {
+    fieldNames.push(column)
+
+    fields[column] = {
+      type: extraFields[column].type,
+      nullable: !!extraFields[column].nullable,
+      defaultRaw: extraFields[column].defaultValue,
+      ...(extraFields[column].options ?? {}),
+    }
+  }
+
+  const hashTableName = simpleHash(tableName)
+
+  return new EntitySchema({
+    class: getClass(
+      ...fieldNames.concat("created_at", "updated_at", "deleted_at")
+    ) as any,
+    tableName,
+    properties: {
+      id: {
+        type: "string",
+        nullable: false,
+      },
+      ...fields,
+      created_at: {
+        type: "Date",
+        nullable: false,
+        defaultRaw: "CURRENT_TIMESTAMP",
+      },
+      updated_at: {
+        type: "Date",
+        nullable: false,
+        defaultRaw: "CURRENT_TIMESTAMP",
+      },
+      deleted_at: { type: "Date", nullable: true },
+    },
+    filters: {
+      [SoftDeletableFilterKey]: mikroOrmSoftDeletableFilterOptions,
+    },
+    indexes: [
+      {
+        properties: ["id"],
+        name: "IDX_id_" + hashTableName,
+      },
+      {
+        properties: primary.foreignKey.split(","),
+        name:
+          "IDX_" +
+          primary.foreignKey.split(",").join("_") +
+          "_" +
+          hashTableName,
+      },
+      {
+        properties: foreign.foreignKey,
+        name: "IDX_" + foreign.foreignKey + "_" + hashTableName,
+      },
+      {
+        properties: ["deleted_at"],
+        name: "IDX_deleted_at_" + hashTableName,
+      },
+    ],
+  })
+}

packages/link-modules/src/utils/index.ts

@@ -0,0 +1,12 @@
+import { MODULE_RESOURCE_TYPE } from "@medusajs/types"
+
+export * from "./compose-link-name"
+export * from "./generate-entity"
+
+export function shouldForceTransaction(target: any): boolean {
+  return target.moduleDeclaration?.resources === MODULE_RESOURCE_TYPE.ISOLATED
+}
+
+export function doNotForceTransaction(): boolean {
+  return false
+}

packages/link-modules/tsconfig.json

@@ -0,0 +1,35 @@
+{
+  "compilerOptions": {
+    "lib": ["es2020"],
+    "target": "es2020",
+    "outDir": "./dist",
+    "esModuleInterop": true,
+    "declaration": true,
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "sourceMap": false,
+    "noImplicitReturns": true,
+    "strictNullChecks": true,
+    "strictFunctionTypes": true,
+    "noImplicitThis": true,
+    "allowJs": true,
+    "skipLibCheck": true,
+    "downlevelIteration": true, // to use ES5 specific tooling
+    "baseUrl": ".",
+    "resolveJsonModule": true,
+    "paths": {
+      "@services": ["./src/services"],
+      "@repositories": ["./src/repositories"]
+    }
+  },
+  "include": ["src"],
+  "exclude": [
+    "dist",
+    "./src/**/__tests__",
+    "./src/**/__mocks__",
+    "./src/**/__fixtures__",
+    "node_modules"
+  ]
+}

packages/link-modules/tsconfig.spec.json

@@ -0,0 +1,5 @@
+{
+  "extends": "./tsconfig.json",
+  "include": ["src", "integration-tests"],
+  "exclude": ["node_modules", "dist"]
+}

packages/medusa-js/src/test/utils/utils.test.ts

@@ -1,4 +1,4 @@
-import { stringifyNullProperties } from "../../src/utils"
+const { stringifyNullProperties } = require("../../utils")
 
 describe("stringifyNullProperties", () => {
   test("returns empty object on no props", () => {

packages/medusa-js/tsconfig.spec.json

@@ -1,4 +1,10 @@
 {
   "extends": "./tsconfig.json",
-  "include": ["test"],
+  "include": [
+    "./src/**/*",
+    "index.d.ts",
+    "./src/**/__tests__",
+    "./src/**/__mocks__"
+  ],
+  "exclude": ["node_modules"]
 }

packages/modules-sdk/jest.config.js

@@ -1,12 +1,12 @@
 module.exports = {
-  globals: {
-    "ts-jest": {
-      tsConfig: "tsconfig.json",
-      isolatedModules: false,
-    },
-  },
   transform: {
-    "^.+\\.[jt]s?$": "ts-jest",
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsConfig: "tsconfig.json",
+        isolatedModules: true,
+      },
+    ],
   },
   testEnvironment: `node`,
   moduleFileExtensions: [`js`, `ts`],

packages/modules-sdk/package.json

@@ -18,10 +18,10 @@
   "license": "MIT",
   "devDependencies": {
     "cross-env": "^5.2.1",
-    "jest": "^25.5.4",
+    "jest": "^29.6.3",
     "rimraf": "^5.0.1",
-    "ts-jest": "^25.5.1",
-    "typescript": "^4.4.4"
+    "ts-jest": "^29.1.1",
+    "typescript": "^5.1.6"
   },
   "dependencies": {
     "@medusajs/orchestration": "^0.2.0",

packages/modules-sdk/src/__mocks__/inventory-module.ts

@@ -0,0 +1,27 @@
+export const InventoryModule = {
+  __definition: {
+    key: "inventoryService",
+    registrationName: "inventoryService",
+    defaultPackage: false,
+    label: "InventoryService",
+    isRequired: false,
+    canOverride: true,
+    isQueryable: true,
+    dependencies: [],
+    defaultModuleDeclaration: {
+      scope: "internal",
+      resources: "shared",
+    },
+  },
+  __joinerConfig: {
+    serviceName: "inventoryService",
+    primaryKeys: ["id"],
+    linkableKeys: [
+      "inventory_item_id",
+      "inventory_level_id",
+      "reservation_item_id",
+    ],
+  },
+
+  softDelete: jest.fn(() => {}),
+}

packages/modules-sdk/src/__mocks__/inventory-stock-location-link.ts

@@ -0,0 +1,71 @@
+export const InventoryStockLocationLink = {
+  __definition: {
+    key: "inventoryStockLocationLink",
+    registrationName: "inventoryStockLocationLink",
+    defaultPackage: "",
+    label: "inventoryStockLocationLink",
+    canOverride: true,
+    isRequired: false,
+    isQueryable: true,
+    defaultModuleDeclaration: {
+      scope: "internal",
+      resources: "shared",
+    },
+  },
+  __joinerConfig: {
+    serviceName: "inventoryStockLocationLink",
+    isLink: true,
+    alias: [
+      {
+        name: "inventory_level_stock_location",
+      },
+      {
+        name: "inventory_level_stock_locations",
+      },
+    ],
+    primaryKeys: ["inventory_level_id", "stock_location_id"],
+    relationships: [
+      {
+        serviceName: "inventoryService",
+        primaryKey: "id",
+        foreignKey: "inventory_level_id",
+        alias: "inventory_level",
+        args: {},
+      },
+      {
+        serviceName: "stockLocationService",
+        primaryKey: "id",
+        foreignKey: "stock_location_id",
+        alias: "stock_location",
+      },
+    ],
+    extends: [
+      {
+        serviceName: "inventoryService",
+        relationship: {
+          serviceName: "inventoryStockLocationLink",
+          primaryKey: "inventory_level_id",
+          foreignKey: "id",
+          alias: "inventory_location_items",
+        },
+      },
+      {
+        serviceName: "stockLocationService",
+        relationship: {
+          serviceName: "inventoryStockLocationLink",
+          primaryKey: "stock_location_id",
+          foreignKey: "id",
+          alias: "inventory_location_items",
+        },
+      },
+    ],
+  },
+
+  create: jest.fn(
+    async (
+      primaryKeyOrBulkData: string | string[] | [string | string[], string][],
+      foreignKeyData?: string
+    ) => {}
+  ),
+  softDelete: jest.fn(() => {}),
+}

packages/modules-sdk/src/__mocks__/product-inventory-link.ts

@@ -0,0 +1,77 @@
+export const ProductInventoryLinkModule = {
+  __definition: {
+    key: "productVariantInventoryInventoryItemLink",
+    registrationName: "productVariantInventoryInventoryItemLink",
+    defaultPackage: "",
+    label: "productVariantInventoryInventoryItemLink",
+    canOverride: true,
+    isRequired: false,
+    isQueryable: true,
+    defaultModuleDeclaration: {
+      scope: "internal",
+      resources: "shared",
+    },
+  },
+  __joinerConfig: {
+    serviceName: "productVariantInventoryInventoryItemLink",
+    isLink: true,
+    databaseConfig: {
+      tableName: "product_variant_inventory_item",
+    },
+    alias: [
+      {
+        name: "product_variant_inventory_item",
+      },
+      {
+        name: "product_variant_inventory_items",
+      },
+    ],
+    primaryKeys: ["variant_id", "inventory_item_id"],
+    relationships: [
+      {
+        serviceName: "productService",
+        primaryKey: "id",
+        foreignKey: "variant_id",
+        alias: "variant",
+        args: {},
+        deleteCascade: true,
+      },
+      {
+        serviceName: "inventoryService",
+        primaryKey: "id",
+        foreignKey: "inventory_item_id",
+        alias: "inventory",
+        deleteCascade: true,
+      },
+    ],
+    extends: [
+      {
+        serviceName: "productService",
+        relationship: {
+          serviceName: "productVariantInventoryInventoryItemLink",
+          primaryKey: "variant_id",
+          foreignKey: "id",
+          alias: "inventory_items",
+          isList: true,
+        },
+      },
+      {
+        serviceName: "inventoryService",
+        relationship: {
+          serviceName: "productVariantInventoryInventoryItemLink",
+          primaryKey: "inventory_item_id",
+          foreignKey: "id",
+          alias: "variant_link",
+        },
+      },
+    ],
+  },
+
+  create: jest.fn(
+    async (
+      primaryKeyOrBulkData: string | string[] | [string | string[], string][],
+      foreignKeyData?: string
+    ) => {}
+  ),
+  softDelete: jest.fn(() => {}),
+}

packages/modules-sdk/src/__mocks__/product-module.ts

@@ -0,0 +1,24 @@
+export const ProductModule = {
+  __definition: {
+    key: "productService",
+    registrationName: "productModuleService",
+    defaultPackage: false,
+    label: "ProductModuleService",
+    isRequired: false,
+    canOverride: true,
+    isQueryable: true,
+    dependencies: ["eventBusModuleService"],
+    defaultModuleDeclaration: {
+      scope: "internal",
+      resources: "shared",
+    },
+  },
+  __joinerConfig: {
+    serviceName: "productService",
+    primaryKeys: ["id", "handle"],
+    linkableKeys: ["product_id", "variant_id"],
+    alias: [],
+  },
+
+  softDelete: jest.fn(() => {}),
+}

packages/modules-sdk/src/__mocks__/stock-location-module.ts

@@ -0,0 +1,24 @@
+export const StockLocationModule = {
+  __definition: {
+    key: "stockLocationService",
+    registrationName: "stockLocationService",
+    defaultPackage: false,
+    label: "StockLocationService",
+    isRequired: false,
+    canOverride: true,
+    isQueryable: true,
+    dependencies: ["eventBusService"],
+    defaultModuleDeclaration: {
+      scope: "internal",
+      resources: "shared",
+    },
+  },
+  __joinerConfig: {
+    serviceName: "stockLocationService",
+    primaryKeys: ["id"],
+    linkableKeys: ["stock_location_id"],
+    alias: [],
+  },
+
+  softDelete: jest.fn(() => {}),
+}

packages/modules-sdk/src/__tests__/remote-link.spec.ts

@@ -0,0 +1,202 @@
+import { InventoryModule } from "../__mocks__/inventory-module"
+import { InventoryStockLocationLink } from "../__mocks__/inventory-stock-location-link"
+import { ProductInventoryLinkModule } from "../__mocks__/product-inventory-link"
+import { ProductModule } from "../__mocks__/product-module"
+import { StockLocationModule } from "../__mocks__/stock-location-module"
+
+import { RemoteLink } from "../remote-link"
+
+const allModules = [
+  // modules
+  ProductModule,
+  InventoryModule,
+  StockLocationModule,
+  // links
+  ProductInventoryLinkModule,
+  InventoryStockLocationLink,
+]
+describe("Remote Link", function () {
+  it("Should get all loaded modules and compose their relationships", async function () {
+    const remoteLink = new RemoteLink(allModules as any)
+
+    const relations = remoteLink.getRelationships()
+
+    const prodInventoryLink = relations.get(
+      "productVariantInventoryInventoryItemLink"
+    )
+    const prodModule = relations.get("productService")
+    const inventoryModule = relations.get("inventoryService")
+
+    expect(prodInventoryLink?.get("variant_id")).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          serviceName: "productService",
+          primaryKey: "id",
+          foreignKey: "variant_id",
+          alias: "variant",
+          deleteCascade: true,
+          isPrimary: false,
+          isForeign: true,
+        }),
+      ])
+    )
+
+    expect(prodInventoryLink?.get("inventory_item_id")).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          serviceName: "inventoryService",
+          primaryKey: "id",
+          foreignKey: "inventory_item_id",
+          alias: "inventory",
+          deleteCascade: true,
+          isPrimary: false,
+          isForeign: true,
+        }),
+      ])
+    )
+
+    expect(prodModule?.get("variant_id")).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          serviceName: "productVariantInventoryInventoryItemLink",
+          primaryKey: "variant_id",
+          foreignKey: "id",
+          alias: "inventory_items",
+          isList: true,
+          isPrimary: true,
+          isForeign: false,
+        }),
+      ])
+    )
+
+    expect(inventoryModule?.get("inventory_item_id")).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          serviceName: "productVariantInventoryInventoryItemLink",
+          primaryKey: "inventory_item_id",
+          foreignKey: "id",
+          alias: "variant_link",
+          isPrimary: true,
+          isForeign: false,
+        }),
+      ])
+    )
+  })
+
+  it("Should call the correct link module to create relation between 2 keys", async function () {
+    const remoteLink = new RemoteLink(allModules as any)
+
+    await remoteLink.create([
+      {
+        productService: {
+          variant_id: "var_123",
+        },
+        inventoryService: {
+          inventory_item_id: "inv_123",
+        },
+      },
+      {
+        productService: {
+          variant_id: "var_abc",
+        },
+        inventoryService: {
+          inventory_item_id: "inv_abc",
+        },
+      },
+      {
+        inventoryService: {
+          inventory_level_id: "ilev_123",
+        },
+        stockLocationService: {
+          stock_location_id: "loc_123",
+        },
+      },
+    ])
+
+    expect(ProductInventoryLinkModule.create).toBeCalledWith([
+      ["var_123", "inv_123"],
+      ["var_abc", "inv_abc"],
+    ])
+    expect(InventoryStockLocationLink.create).toBeCalledWith([
+      ["ilev_123", "loc_123"],
+    ])
+  })
+
+  it("Should call delete in cascade all the modules involved in the link", async function () {
+    const remoteLink = new RemoteLink(allModules as any)
+
+    ProductInventoryLinkModule.softDelete.mockImplementation(() => {
+      return {
+        variant_id: ["var_123"],
+        inventory_item_id: ["inv_123"],
+      }
+    })
+
+    ProductModule.softDelete.mockImplementation(() => {
+      return {
+        product_id: ["prod_123", "prod_abc"],
+        variant_id: ["var_123", "var_abc"],
+      }
+    })
+
+    InventoryModule.softDelete.mockImplementation(() => {
+      return {
+        inventory_item_id: ["inv_123"],
+        inventory_level_id: ["ilev_123"],
+      }
+    })
+
+    InventoryStockLocationLink.softDelete.mockImplementation(() => {
+      return {
+        inventory_level_id: ["ilev_123"],
+        stock_location_id: ["loc_123"],
+      }
+    })
+
+    await remoteLink.delete({
+      productService: {
+        variant_id: "var_123",
+      },
+    })
+
+    expect(ProductInventoryLinkModule.softDelete).toBeCalledTimes(2)
+    expect(ProductModule.softDelete).toBeCalledTimes(1)
+    expect(InventoryModule.softDelete).toBeCalledTimes(1)
+    expect(InventoryStockLocationLink.softDelete).toBeCalledTimes(1)
+
+    expect(ProductInventoryLinkModule.softDelete).toHaveBeenNthCalledWith(
+      1,
+      { variant_id: ["var_123"] },
+      { returnLinkableKeys: ["variant_id", "inventory_item_id"] }
+    )
+
+    expect(ProductInventoryLinkModule.softDelete).toHaveBeenNthCalledWith(
+      2,
+      { variant_id: ["var_abc"] },
+      { returnLinkableKeys: ["variant_id", "inventory_item_id"] }
+    )
+
+    expect(ProductModule.softDelete).toBeCalledWith(
+      { id: ["var_123"] },
+      { returnLinkableKeys: ["product_id", "variant_id"] }
+    )
+
+    expect(InventoryModule.softDelete).toBeCalledWith(
+      { id: ["inv_123"] },
+      {
+        returnLinkableKeys: [
+          "inventory_item_id",
+          "inventory_level_id",
+          "reservation_item_id",
+        ],
+      }
+    )
+
+    expect(InventoryStockLocationLink.softDelete).toBeCalledWith(
+      {
+        inventory_level_id: ["ilev_123"],
+      },
+      { returnLinkableKeys: ["inventory_level_id", "stock_location_id"] }
+    )
+  })
+})

packages/modules-sdk/src/index.ts

@@ -1,6 +1,8 @@
 export * from "@medusajs/types/dist/modules-sdk"
 export * from "./definitions"
 export * from "./loaders"
+export * from "./medusa-app"
 export * from "./medusa-module"
 export * from "./module-helper"
+export * from "./remote-link"
 export * from "./remote-query"

packages/modules-sdk/src/loaders/module-loader.ts

@@ -1,9 +1,10 @@
 import {
   Logger,
-  MedusaContainer,
   MODULE_SCOPE,
+  MedusaContainer,
   ModuleResolution,
 } from "@medusajs/types"
+
 import { asValue } from "awilix"
 import { EOL } from "os"
 import { ModulesHelper } from "../module-helper"
@@ -11,53 +12,6 @@ import { loadInternalModule } from "./utils"
 
 export const moduleHelper = new ModulesHelper()
 
-async function loadModule(
-  container: MedusaContainer,
-  resolution: ModuleResolution,
-  logger: Logger
-): Promise<{ error?: Error } | void> {
-  const modDefinition = resolution.definition
-  const registrationName = modDefinition.registrationName
-
-  const { scope, resources } = resolution.moduleDeclaration ?? ({} as any)
-
-  const canSkip =
-    !resolution.resolutionPath &&
-    !modDefinition.isRequired &&
-    !modDefinition.defaultPackage
-
-  if (scope === MODULE_SCOPE.EXTERNAL && !canSkip) {
-    // TODO: implement external Resolvers
-    // return loadExternalModule(...)
-    throw new Error("External Modules are not supported yet.")
-  }
-
-  if (!scope || (scope === MODULE_SCOPE.INTERNAL && !resources)) {
-    let message = `The module ${resolution.definition.label} has to define its scope (internal | external)`
-    if (scope === MODULE_SCOPE.INTERNAL && !resources) {
-      message = `The module ${resolution.definition.label} is missing its resources config`
-    }
-
-    container.register({
-      [registrationName]: asValue(undefined),
-    })
-
-    return {
-      error: new Error(message),
-    }
-  }
-
-  if (resolution.resolutionPath === false) {
-    container.register({
-      [registrationName]: asValue(undefined),
-    })
-
-    return
-  }
-
-  return await loadInternalModule(container, resolution, logger)
-}
-
 export const moduleLoader = async ({
   container,
   moduleResolutions,
@@ -94,7 +48,48 @@ export const moduleLoader = async ({
     }, {})
   )
 
-  container.register({
-    modulesHelper: asValue(moduleHelper),
-  })
+  container.register("modulesHelper", asValue(moduleHelper))
+}
+
+async function loadModule(
+  container: MedusaContainer,
+  resolution: ModuleResolution,
+  logger: Logger
+): Promise<{ error?: Error } | void> {
+  const modDefinition = resolution.definition
+  const registrationName = modDefinition.registrationName
+
+  const { scope, resources } = resolution.moduleDeclaration ?? ({} as any)
+
+  const canSkip =
+    !resolution.resolutionPath &&
+    !modDefinition.isRequired &&
+    !modDefinition.defaultPackage
+
+  if (scope === MODULE_SCOPE.EXTERNAL && !canSkip) {
+    // TODO: implement external Resolvers
+    // return loadExternalModule(...)
+    throw new Error("External Modules are not supported yet.")
+  }
+
+  if (!scope || (scope === MODULE_SCOPE.INTERNAL && !resources)) {
+    let message = `The module ${resolution.definition.label} has to define its scope (internal | external)`
+    if (scope === MODULE_SCOPE.INTERNAL && !resources) {
+      message = `The module ${resolution.definition.label} is missing its resources config`
+    }
+
+    container.register(registrationName, asValue(undefined))
+
+    return {
+      error: new Error(message),
+    }
+  }
+
+  if (resolution.resolutionPath === false) {
+    container.register(registrationName, asValue(undefined))
+
+    return
+  }
+
+  return await loadInternalModule(container, resolution, logger)
 }

packages/modules-sdk/src/loaders/register-modules.ts

@@ -6,9 +6,10 @@ import {
   ModuleExports,
   ModuleResolution,
 } from "@medusajs/types"
+
 import { isObject } from "@medusajs/utils"
 import resolveCwd from "resolve-cwd"
-import MODULE_DEFINITIONS from "../definitions"
+import { MODULE_DEFINITIONS, ModulesDefinition } from "../definitions"
 
 export const registerModules = (
   modules?: Record<
@@ -46,34 +47,57 @@ export const registerModules = (
 
 export const registerMedusaModule = (
   moduleKey: string,
-  moduleDeclaration: InternalModuleDeclaration | ExternalModuleDeclaration,
+  moduleDeclaration:
+    | Partial<InternalModuleDeclaration | ExternalModuleDeclaration>
+    | string
+    | false,
+  moduleExports?: ModuleExports,
+  definition?: ModuleDefinition
+): Record<string, ModuleResolution> => {
+  const moduleResolutions = {} as Record<string, ModuleResolution>
+
+  const modDefinition = definition ?? ModulesDefinition[moduleKey]
+
+  if (modDefinition === undefined) {
+    throw new Error(`Module: ${moduleKey} is not defined.`)
+  }
+
+  if (
+    isObject(moduleDeclaration) &&
+    moduleDeclaration?.scope === MODULE_SCOPE.EXTERNAL
+  ) {
+    // TODO: getExternalModuleResolution(...)
+    throw new Error("External Modules are not supported yet.")
+  }
+
+  moduleResolutions[moduleKey] = getInternalModuleResolution(
+    modDefinition,
+    moduleDeclaration as InternalModuleDeclaration,
+    moduleExports
+  )
+
+  return moduleResolutions
+}
+
+export const registerMedusaLinkModule = (
+  definition: ModuleDefinition,
+  moduleDeclaration: Partial<InternalModuleDeclaration>,
   moduleExports?: ModuleExports
 ): Record<string, ModuleResolution> => {
   const moduleResolutions = {} as Record<string, ModuleResolution>
 
-  for (const definition of MODULE_DEFINITIONS) {
-    if (definition.key !== moduleKey) {
-      continue
-    }
-
-    if (moduleDeclaration.scope === MODULE_SCOPE.EXTERNAL) {
-      // TODO: getExternalModuleResolution(...)
-      throw new Error("External Modules are not supported yet.")
-    }
-
-    moduleResolutions[definition.key] = getInternalModuleResolution(
-      definition,
-      moduleDeclaration as InternalModuleDeclaration,
-      moduleExports
-    )
-  }
+  moduleResolutions[definition.key] = getInternalModuleResolution(
+    definition,
+    moduleDeclaration as InternalModuleDeclaration,
+    moduleExports
+  )
 
   return moduleResolutions
 }
 
 function getInternalModuleResolution(
   definition: ModuleDefinition,
-  moduleConfig: InternalModuleDeclaration | false | string,
+  moduleConfig: InternalModuleDeclaration | string | false,
   moduleExports?: ModuleExports
 ): ModuleResolution {
   if (typeof moduleConfig === "boolean") {
@@ -116,7 +140,7 @@ function getInternalModuleResolution(
       ),
     ],
     moduleDeclaration: {
-      ...definition.defaultModuleDeclaration,
+      ...(definition.defaultModuleDeclaration ?? {}),
       ...moduleDeclaration,
     },
     moduleExports,

packages/modules-sdk/src/loaders/utils/load-internal.ts

@@ -2,9 +2,9 @@ import {
   Constructor,
   InternalModuleDeclaration,
   Logger,
-  MedusaContainer,
   MODULE_RESOURCE_TYPE,
   MODULE_SCOPE,
+  MedusaContainer,
   ModuleExports,
   ModuleResolution,
 } from "@medusajs/types"
@@ -30,9 +30,14 @@ export async function loadInternalModule(
     // the exports. This is useful when a package export an initialize function which will bootstrap itself and therefore
     // does not need to import the package that is currently being loaded as it would create a
     // circular reference.
-    loadedModule =
-      resolution.moduleExports ??
-      (await import(resolution.resolutionPath as string)).default
+    const path = resolution.resolutionPath as string
+
+    if (resolution.moduleExports) {
+      loadedModule = resolution.moduleExports
+    } else {
+      loadedModule = await import(path)
+      loadedModule = (loadedModule as any).default
+    }
   } catch (error) {
     if (
       resolution.definition.isRequired &&

packages/modules-sdk/src/medusa-app.ts

@@ -0,0 +1,183 @@
+import { RemoteFetchDataCallback } from "@medusajs/orchestration"
+import {
+  LoadedModule,
+  MODULE_RESOURCE_TYPE,
+  MODULE_SCOPE,
+  ModuleConfig,
+  ModuleJoinerConfig,
+  ModuleServiceInitializeOptions,
+  RemoteJoinerQuery,
+} from "@medusajs/types"
+import {
+  ContainerRegistrationKeys,
+  ModulesSdkUtils,
+  isObject,
+} from "@medusajs/utils"
+import { MODULE_PACKAGE_NAMES, Modules } from "./definitions"
+import { MedusaModule } from "./medusa-module"
+import { RemoteLink } from "./remote-link"
+import { RemoteQuery } from "./remote-query"
+
+export type MedusaModuleConfig = (Partial<ModuleConfig> | Modules)[]
+export type SharedResources = {
+  database?: ModuleServiceInitializeOptions["database"] & {
+    pool?: {
+      name?: string
+      afterCreate?: Function
+      min?: number
+      max?: number
+      refreshIdle?: boolean
+      idleTimeoutMillis?: number
+      reapIntervalMillis?: number
+      returnToHead?: boolean
+      priorityRange?: number
+      log?: (message: string, logLevel: string) => void
+    }
+  }
+}
+
+export async function MedusaApp({
+  sharedResourcesConfig,
+  modulesConfigPath,
+  modulesConfig,
+  linkModules,
+  remoteFetchData,
+}: {
+  sharedResourcesConfig?: SharedResources
+  loadedModules?: LoadedModule[]
+  modulesConfigPath?: string
+  modulesConfig?: MedusaModuleConfig
+  linkModules?: ModuleJoinerConfig | ModuleJoinerConfig[]
+  remoteFetchData?: RemoteFetchDataCallback
+} = {}): Promise<{
+  modules: Record<string, LoadedModule | LoadedModule[]>
+  link: RemoteLink | undefined
+  query: (
+    query: string | RemoteJoinerQuery,
+    variables?: Record<string, unknown>
+  ) => Promise<any>
+}> {
+  const modules: MedusaModuleConfig =
+    modulesConfig ??
+    (await import(process.cwd() + (modulesConfigPath ?? "/modules-config")))
+      .default
+
+  const injectedDependencies: any = {}
+
+  const dbData = ModulesSdkUtils.loadDatabaseConfig(
+    "medusa",
+    sharedResourcesConfig as ModuleServiceInitializeOptions,
+    true
+  )!
+  const { pool } = sharedResourcesConfig?.database ?? {}
+
+  if (dbData?.clientUrl) {
+    const { knex } = await import("knex")
+    const dbConnection = knex({
+      client: "pg",
+      searchPath: dbData.schema || "public",
+      connection: {
+        connectionString: dbData.clientUrl,
+        ssl: (dbData.driverOptions?.connection as any).ssl! ?? false,
+      },
+      pool: {
+        // https://knexjs.org/guide/#pool
+        ...(pool ?? {}),
+        min: pool?.min ?? 0,
+      },
+    })
+
+    injectedDependencies[ContainerRegistrationKeys.PG_CONNECTION] = dbConnection
+  }
+
+  const allModules: Record<string, LoadedModule | LoadedModule[]> = {}
+
+  await Promise.all(
+    modules.map(async (mod: Partial<ModuleConfig> | Modules) => {
+      let key: Modules | string = mod as Modules
+      let path: string
+      let declaration: any = {}
+
+      if (isObject(mod)) {
+        if (!mod.module) {
+          throw new Error(
+            `Module ${JSON.stringify(mod)} is missing module name.`
+          )
+        }
+
+        key = mod.module
+        path = mod.path ?? MODULE_PACKAGE_NAMES[key]
+
+        declaration = { ...mod }
+        delete declaration.definition
+      } else {
+        path = MODULE_PACKAGE_NAMES[mod as Modules]
+      }
+
+      if (!path) {
+        throw new Error(`Module ${key} is missing path.`)
+      }
+
+      declaration.scope ??= MODULE_SCOPE.INTERNAL
+
+      if (
+        declaration.scope === MODULE_SCOPE.INTERNAL &&
+        !declaration.resources
+      ) {
+        declaration.resources = MODULE_RESOURCE_TYPE.SHARED
+      }
+
+      const loaded = (await MedusaModule.bootstrap(
+        key,
+        path,
+        declaration,
+        undefined,
+        injectedDependencies,
+        isObject(mod) ? mod.definition : undefined
+      )) as LoadedModule
+
+      if (allModules[key] && !Array.isArray(allModules[key])) {
+        allModules[key] = []
+      }
+
+      if (allModules[key]) {
+        ;(allModules[key] as LoadedModule[]).push(loaded[key])
+      } else {
+        allModules[key] = loaded[key]
+      }
+
+      return loaded
+    })
+  )
+
+  let link: RemoteLink | undefined = undefined
+  let query: (
+    query: string | RemoteJoinerQuery,
+    variables?: Record<string, unknown>
+  ) => Promise<any>
+
+  try {
+    const { initialize: initializeLinks } = await import(
+      "@medusajs/link-modules" as string
+    )
+    await initializeLinks({}, linkModules, injectedDependencies)
+
+    link = new RemoteLink()
+  } catch (err) {
+    console.warn("Error initializing link modules.", err)
+  }
+
+  const remoteQuery = new RemoteQuery(undefined, remoteFetchData)
+  query = async (
+    query: string | RemoteJoinerQuery,
+    variables?: Record<string, unknown>
+  ) => {
+    return await remoteQuery.query(query, variables)
+  }
+
+  return {
+    modules: allModules,
+    link,
+    query,
+  }
+}

packages/modules-sdk/src/medusa-module.ts

@@ -1,10 +1,13 @@
 import {
   ExternalModuleDeclaration,
   InternalModuleDeclaration,
+  LinkModuleDefinition,
   LoadedModule,
   MODULE_RESOURCE_TYPE,
   MODULE_SCOPE,
+  ModuleDefinition,
   ModuleExports,
+  ModuleJoinerConfig,
   ModuleResolution,
 } from "@medusajs/types"
 import {
@@ -12,7 +15,11 @@ import {
   simpleHash,
   stringifyCircular,
 } from "@medusajs/utils"
-import { moduleLoader, registerMedusaModule } from "./loaders"
+import {
+  moduleLoader,
+  registerMedusaLinkModule,
+  registerMedusaModule,
+} from "./loaders"
 
 import { asValue } from "awilix"
 import { loadModuleMigrations } from "./loaders/utils"
@@ -36,6 +43,7 @@ declare global {
 type ModuleAlias = {
   key: string
   hash: string
+  isLink: boolean
   alias?: string
   main?: boolean
 }
@@ -125,7 +133,8 @@ export class MedusaModule {
     defaultPath: string,
     declaration?: InternalModuleDeclaration | ExternalModuleDeclaration,
     moduleExports?: ModuleExports,
-    injectedDependencies?: Record<string, any>
+    injectedDependencies?: Record<string, any>,
+    moduleDefinition?: ModuleDefinition
   ): Promise<{
     [key: string]: T
   }> {
@@ -157,10 +166,10 @@ export class MedusaModule {
 
     if (declaration?.scope !== MODULE_SCOPE.EXTERNAL) {
       modDeclaration = {
-        scope: MODULE_SCOPE.INTERNAL,
-        resources: MODULE_RESOURCE_TYPE.ISOLATED,
+        scope: declaration?.scope || MODULE_SCOPE.INTERNAL,
+        resources: declaration?.resources || MODULE_RESOURCE_TYPE.ISOLATED,
         resolve: defaultPath,
-        options: declaration,
+        options: declaration?.options ?? declaration,
         alias: declaration?.alias,
         main: declaration?.main,
       }
@@ -177,6 +186,118 @@ export class MedusaModule {
     const moduleResolutions = registerMedusaModule(
       moduleKey,
       modDeclaration!,
+      moduleExports,
+      moduleDefinition
+    )
+
+    try {
+      await moduleLoader({
+        container,
+        moduleResolutions,
+        logger,
+      })
+    } catch (err) {
+      errorLoading(err)
+      throw err
+    }
+
+    const services = {}
+
+    for (const resolution of Object.values(
+      moduleResolutions
+    ) as ModuleResolution[]) {
+      const keyName = resolution.definition.key
+      const registrationName = resolution.definition.registrationName
+
+      services[keyName] = container.resolve(registrationName)
+      services[keyName].__definition = resolution.definition
+
+      if (resolution.definition.isQueryable) {
+        const joinerConfig: ModuleJoinerConfig = await services[
+          keyName
+        ].__joinerConfig()
+
+        services[keyName].__joinerConfig = joinerConfig
+      }
+
+      MedusaModule.registerModule(keyName, {
+        key: keyName,
+        hash: hashKey,
+        alias: modDeclaration.alias ?? hashKey,
+        main: !!modDeclaration.main,
+        isLink: false,
+      })
+    }
+
+    MedusaModule.instances_.set(hashKey, services)
+    finishLoading(services)
+    MedusaModule.loading_.delete(hashKey)
+
+    return services
+  }
+
+  public static async bootstrapLink(
+    definition: LinkModuleDefinition,
+    declaration?: InternalModuleDeclaration,
+    moduleExports?: ModuleExports,
+    injectedDependencies?: Record<string, any>
+  ): Promise<{
+    [key: string]: unknown
+  }> {
+    const moduleKey = definition.key
+    const hashKey = simpleHash(stringifyCircular({ moduleKey, declaration }))
+
+    if (MedusaModule.instances_.has(hashKey)) {
+      return MedusaModule.instances_.get(hashKey)
+    }
+
+    if (MedusaModule.loading_.has(hashKey)) {
+      return MedusaModule.loading_.get(hashKey)
+    }
+
+    let finishLoading: any
+    let errorLoading: any
+    MedusaModule.loading_.set(
+      hashKey,
+      new Promise((resolve, reject) => {
+        finishLoading = resolve
+        errorLoading = reject
+      })
+    )
+
+    let modDeclaration =
+      declaration ?? ({} as Partial<InternalModuleDeclaration>)
+
+    const moduleDefinition: ModuleDefinition = {
+      key: definition.key,
+      registrationName: definition.key,
+      dependencies: definition.dependencies,
+      defaultPackage: "",
+      label: definition.label,
+      canOverride: true,
+      isRequired: false,
+      isQueryable: true,
+      defaultModuleDeclaration: definition.defaultModuleDeclaration,
+    }
+
+    modDeclaration = {
+      resolve: "",
+      options: declaration,
+      alias: declaration?.alias,
+      main: declaration?.main,
+    }
+
+    const container = createMedusaContainer()
+
+    if (injectedDependencies) {
+      for (const service in injectedDependencies) {
+        container.register(service, asValue(injectedDependencies[service]))
+      }
+    }
+
+    const moduleResolutions = registerMedusaLinkModule(
+      moduleDefinition,
+      modDeclaration as InternalModuleDeclaration,
       moduleExports
     )
 
@@ -203,9 +324,17 @@ export class MedusaModule {
       services[keyName].__definition = resolution.definition
 
       if (resolution.definition.isQueryable) {
-        services[keyName].__joinerConfig = await services[
+        const joinerConfig: ModuleJoinerConfig = await services[
           keyName
         ].__joinerConfig()
+
+        services[keyName].__joinerConfig = joinerConfig
+
+        if (!joinerConfig.isLink) {
+          throw new Error(
+            "MedusaModule.bootstrapLink must be used only for Link Modules"
+          )
+        }
       }
 
       MedusaModule.registerModule(keyName, {
@@ -213,6 +342,7 @@ export class MedusaModule {
         hash: hashKey,
         alias: modDeclaration.alias ?? hashKey,
         main: !!modDeclaration.main,
+        isLink: true,
       })
     }
 

packages/modules-sdk/src/remote-link.ts

@@ -0,0 +1,439 @@
+import {
+  ILinkModule,
+  LoadedModule,
+  ModuleJoinerRelationship,
+} from "@medusajs/types"
+
+import { isObject, toPascalCase } from "@medusajs/utils"
+import { MedusaModule } from "./medusa-module"
+
+export type DeleteEntityInput = {
+  [moduleName: string]: { [linkableKey: string]: string | string[] }
+}
+export type RestoreEntityInput = DeleteEntityInput
+
+type LinkDefinition = {
+  [moduleName: string]: {
+    [fieldName: string]: string
+  }
+} & {
+  data?: Record<string, unknown>
+}
+
+type RemoteRelationship = ModuleJoinerRelationship & {
+  isPrimary: boolean
+  isForeign: boolean
+}
+
+type LoadedLinkModule = LoadedModule & ILinkModule
+type DeleteEntities = { [key: string]: string[] }
+type RemovedIds = {
+  [serviceName: string]: DeleteEntities
+}
+type RestoredIds = RemovedIds
+
+type CascadeError = {
+  serviceName: string
+  method: String
+  args: any
+  error: Error
+}
+
+export class RemoteLink {
+  private modulesMap: Map<string, LoadedLinkModule> = new Map()
+  private relationsPairs: Map<string, LoadedLinkModule> = new Map()
+  private relations: Map<string, Map<string, RemoteRelationship[]>> = new Map()
+
+  constructor(modulesLoaded?: LoadedModule[]) {
+    if (!modulesLoaded?.length) {
+      modulesLoaded = MedusaModule.getLoadedModules().map(
+        (mod) => Object.values(mod)[0]
+      )
+    }
+
+    for (const mod of modulesLoaded) {
+      this.addModule(mod)
+    }
+  }
+
+  public addModule(mod: LoadedModule): void {
+    if (!mod.__definition.isQueryable || mod.__joinerConfig.isReadOnlyLink) {
+      return
+    }
+
+    const joinerConfig = mod.__joinerConfig
+
+    const serviceName = joinerConfig.isLink
+      ? joinerConfig.serviceName!
+      : mod.__definition.key
+
+    if (this.modulesMap.has(serviceName)) {
+      throw new Error(
+        `Duplicated instance of module ${serviceName} is not allowed.`
+      )
+    }
+
+    if (joinerConfig.relationships?.length) {
+      if (joinerConfig.isLink) {
+        const [primary, foreign] = joinerConfig.relationships
+        const key = [
+          primary.serviceName,
+          primary.foreignKey,
+          foreign.serviceName,
+          foreign.foreignKey,
+        ].join("-")
+        this.relationsPairs.set(key, mod as unknown as LoadedLinkModule)
+      }
+      for (const relationship of joinerConfig.relationships) {
+        if (joinerConfig.isLink && !relationship.deleteCascade) {
+          continue
+        }
+
+        this.addRelationship(serviceName, {
+          ...relationship,
+          isPrimary: false,
+          isForeign: true,
+        })
+      }
+    }
+
+    if (joinerConfig.extends?.length) {
+      for (const service of joinerConfig.extends) {
+        const relationship = service.relationship
+        this.addRelationship(service.serviceName, {
+          ...relationship,
+          serviceName: serviceName,
+          isPrimary: true,
+          isForeign: false,
+        })
+      }
+    }
+
+    this.modulesMap.set(serviceName, mod as unknown as LoadedLinkModule)
+  }
+
+  private addRelationship(
+    serviceName: string,
+    relationship: RemoteRelationship
+  ): void {
+    const { primaryKey, foreignKey } = relationship
+
+    if (!this.relations.has(serviceName)) {
+      this.relations.set(serviceName, new Map())
+    }
+
+    const key = relationship.isPrimary ? primaryKey : foreignKey
+    const serviceMap = this.relations.get(serviceName)!
+    if (!serviceMap.has(key)) {
+      serviceMap.set(key, [])
+    }
+
+    serviceMap.get(key)!.push(relationship)
+  }
+
+  getLinkModule(
+    moduleA: string,
+    moduleAKey: string,
+    moduleB: string,
+    moduleBKey: string
+  ) {
+    const key = [moduleA, moduleAKey, moduleB, moduleBKey].join("-")
+    return this.relationsPairs.get(key)
+  }
+
+  getRelationships(): Map<string, Map<string, RemoteRelationship[]>> {
+    return this.relations
+  }
+
+  private getLinkableKeys(mod: LoadedLinkModule) {
+    return (
+      mod.__joinerConfig.linkableKeys ?? mod.__joinerConfig.primaryKeys ?? []
+    )
+  }
+
+  private async executeCascade(
+    removedServices: DeleteEntityInput,
+    method: "softDelete" | "restore"
+  ): Promise<[CascadeError[] | null, RemovedIds]> {
+    const removedIds: RemovedIds = {}
+    const returnIdsList: RemovedIds = {}
+    const processedIds: Record<string, Set<string>> = {}
+
+    const services = Object.keys(removedServices).map((serviceName) => {
+      const deleteKeys = {}
+
+      for (const field in removedServices[serviceName]) {
+        deleteKeys[field] = Array.isArray(removedServices[serviceName][field])
+          ? removedServices[serviceName][field]
+          : [removedServices[serviceName][field]]
+      }
+
+      return { serviceName, deleteKeys }
+    })
+
+    const errors: CascadeError[] = []
+    const cascade = async (
+      services: { serviceName: string; deleteKeys: DeleteEntities }[],
+      isCascading: boolean = false
+    ): Promise<RemovedIds> => {
+      if (errors.length) {
+        return returnIdsList
+      }
+
+      const servicePromises = services.map(async (serviceInfo) => {
+        const serviceRelations = this.relations.get(serviceInfo.serviceName)!
+
+        if (!serviceRelations) {
+          return
+        }
+
+        const values = serviceInfo.deleteKeys
+
+        const deletePromises: Promise<void>[] = []
+
+        for (const field in values) {
+          const relatedServices = serviceRelations.get(field)
+
+          if (!relatedServices || !values[field]?.length) {
+            continue
+          }
+
+          const relatedServicesPromises = relatedServices.map(
+            async (relatedService) => {
+              const { serviceName, primaryKey, args } = relatedService
+              const processedHash = `${serviceName}-${primaryKey}`
+
+              if (!processedIds[processedHash]) {
+                processedIds[processedHash] = new Set()
+              }
+
+              const unprocessedIds = values[field].filter(
+                (id) => !processedIds[processedHash].has(id)
+              )
+
+              if (!unprocessedIds.length) {
+                return
+              }
+
+              unprocessedIds.forEach((id) => {
+                processedIds[processedHash].add(id)
+              })
+
+              let cascadeDelKeys: DeleteEntities = {}
+              cascadeDelKeys[primaryKey] = unprocessedIds
+              const service: ILinkModule = this.modulesMap.get(serviceName)!
+
+              const returnFields = this.getLinkableKeys(
+                service as LoadedLinkModule
+              )
+
+              let deletedEntities: Record<string, string[]> = {}
+
+              try {
+                if (args?.methodSuffix) {
+                  method += toPascalCase(args.methodSuffix)
+                }
+
+                const removed = await service[method](cascadeDelKeys, {
+                  returnLinkableKeys: returnFields,
+                })
+
+                deletedEntities = removed as Record<string, string[]>
+              } catch (error) {
+                errors.push({
+                  serviceName,
+                  method,
+                  args: cascadeDelKeys,
+                  error: JSON.parse(
+                    JSON.stringify(error, Object.getOwnPropertyNames(error))
+                  ),
+                })
+                return
+              }
+
+              if (Object.keys(deletedEntities).length === 0) {
+                return
+              }
+
+              removedIds[serviceName] = {
+                ...deletedEntities,
+              }
+
+              if (!isCascading) {
+                returnIdsList[serviceName] = {
+                  ...deletedEntities,
+                }
+              } else {
+                const [mainKey] = returnFields
+
+                if (!returnIdsList[serviceName]) {
+                  returnIdsList[serviceName] = {}
+                }
+                if (!returnIdsList[serviceName][mainKey]) {
+                  returnIdsList[serviceName][mainKey] = []
+                }
+
+                returnIdsList[serviceName][mainKey] = [
+                  ...new Set(
+                    returnIdsList[serviceName][mainKey].concat(
+                      deletedEntities[mainKey]
+                    )
+                  ),
+                ]
+              }
+
+              Object.keys(deletedEntities).forEach((key) => {
+                deletedEntities[key].forEach((id) => {
+                  const hash = `${serviceName}-${key}`
+                  if (!processedIds[hash]) {
+                    processedIds[hash] = new Set()
+                  }
+
+                  processedIds[hash].add(id)
+                })
+              })
+
+              await cascade(
+                [
+                  {
+                    serviceName: serviceName,
+                    deleteKeys: deletedEntities as DeleteEntities,
+                  },
+                ],
+                true
+              )
+            }
+          )
+
+          deletePromises.push(...relatedServicesPromises)
+        }
+
+        await Promise.all(deletePromises)
+      })
+
+      await Promise.all(servicePromises)
+      return returnIdsList
+    }
+
+    const result = await cascade(services)
+
+    return [errors.length ? errors : null, result]
+  }
+
+  async create(link: LinkDefinition | LinkDefinition[]): Promise<unknown[]> {
+    const allLinks = Array.isArray(link) ? link : [link]
+    const serviceLinks = new Map<
+      string,
+      [string | string[], string, Record<string, unknown>?][]
+    >()
+
+    for (const rel of allLinks) {
+      const extraFields = rel.data
+      delete rel.data
+
+      const mods = Object.keys(rel)
+      if (mods.length > 2) {
+        throw new Error(`Only two modules can be linked.`)
+      }
+
+      const [moduleA, moduleB] = mods
+      const pk = Object.keys(rel[moduleA])
+      const moduleAKey = pk.join(",")
+      const moduleBKey = Object.keys(rel[moduleB]).join(",")
+
+      const service = this.getLinkModule(
+        moduleA,
+        moduleAKey,
+        moduleB,
+        moduleBKey
+      )
+
+      if (!service) {
+        throw new Error(
+          `Module to link ${moduleA}[${moduleAKey}] and ${moduleB}[${moduleBKey}] was not found.`
+        )
+      } else if (!serviceLinks.has(service.__definition.key)) {
+        serviceLinks.set(service.__definition.key, [])
+      }
+
+      const pkValue =
+        pk.length === 1 ? rel[moduleA][pk[0]] : pk.map((k) => rel[moduleA][k])
+
+      const fields: unknown[] = [pkValue, rel[moduleB][moduleBKey]]
+      if (isObject(extraFields)) {
+        fields.push(extraFields)
+      }
+
+      serviceLinks.get(service.__definition.key)?.push(fields as any)
+    }
+
+    const promises: Promise<unknown[]>[] = []
+    for (const [serviceName, links] of serviceLinks) {
+      const service = this.modulesMap.get(serviceName)!
+      promises.push(service.create(links))
+    }
+
+    const created = await Promise.all(promises)
+    return created.flat()
+  }
+
+  async dismiss(link: LinkDefinition | LinkDefinition[]): Promise<unknown[]> {
+    const allLinks = Array.isArray(link) ? link : [link]
+    const serviceLinks = new Map<string, [string | string[], string][]>()
+
+    for (const rel of allLinks) {
+      const mods = Object.keys(rel)
+      if (mods.length > 2) {
+        throw new Error(`Only two modules can be linked.`)
+      }
+
+      const [moduleA, moduleB] = mods
+      const pk = Object.keys(rel[moduleA])
+      const moduleAKey = pk.join(",")
+      const moduleBKey = Object.keys(rel[moduleB]).join(",")
+
+      const service = this.getLinkModule(
+        moduleA,
+        moduleAKey,
+        moduleB,
+        moduleBKey
+      )
+
+      if (!service) {
+        throw new Error(
+          `Module to dismiss link ${moduleA}[${moduleAKey}] and ${moduleB}[${moduleBKey}] was not found.`
+        )
+      } else if (!serviceLinks.has(service.__definition.key)) {
+        serviceLinks.set(service.__definition.key, [])
+      }
+
+      const pkValue =
+        pk.length === 1 ? rel[moduleA][pk[0]] : pk.map((k) => rel[moduleA][k])
+
+      serviceLinks
+        .get(service.__definition.key)
+        ?.push([pkValue, rel[moduleB][moduleBKey]])
+    }
+
+    const promises: Promise<unknown[]>[] = []
+    for (const [serviceName, links] of serviceLinks) {
+      const service = this.modulesMap.get(serviceName)!
+      promises.push(service.dismiss(links))
+    }
+
+    const created = await Promise.all(promises)
+    return created.flat()
+  }
+
+  async delete(
+    removedServices: DeleteEntityInput
+  ): Promise<[CascadeError[] | null, RemovedIds]> {
+    return await this.executeCascade(removedServices, "softDelete")
+  }
+
+  async restore(
+    removedServices: DeleteEntityInput
+  ): Promise<[CascadeError[] | null, RestoredIds]> {
+    return await this.executeCascade(removedServices, "restore")
+  }
+}

packages/modules-sdk/src/remote-query.ts

@@ -2,28 +2,23 @@ import {
   JoinerRelationship,
   JoinerServiceConfig,
   LoadedModule,
+  ModuleJoinerConfig,
   RemoteExpandProperty,
+  RemoteJoinerQuery,
 } from "@medusajs/types"
 
+import { RemoteFetchDataCallback, RemoteJoiner } from "@medusajs/orchestration"
+import { isString, toPascalCase } from "@medusajs/utils"
 import { MedusaModule } from "./medusa-module"
-import { RemoteJoiner } from "@medusajs/orchestration"
-import { toPascalCase } from "@medusajs/utils"
 
 export class RemoteQuery {
   private remoteJoiner: RemoteJoiner
   private modulesMap: Map<string, LoadedModule> = new Map()
+  private customRemoteFetchData?: RemoteFetchDataCallback
 
   constructor(
     modulesLoaded?: LoadedModule[],
-    remoteFetchData?: (
-      expand: RemoteExpandProperty,
-      keyField: string,
-      ids?: (unknown | unknown[])[],
-      relationship?: JoinerRelationship
-    ) => Promise<{
-      data: unknown[] | { [path: string]: unknown[] }
-      path?: string
-    }>
+    customRemoteFetchData?: RemoteFetchDataCallback
   ) {
     if (!modulesLoaded?.length) {
       modulesLoaded = MedusaModule.getLoadedModules().map(
@@ -31,25 +26,28 @@ export class RemoteQuery {
       )
     }
 
-    const servicesConfig: JoinerServiceConfig[] = []
+    const servicesConfig: ModuleJoinerConfig[] = []
     for (const mod of modulesLoaded) {
       if (!mod.__definition.isQueryable) {
         continue
       }
 
-      if (this.modulesMap.has(mod.__definition.key)) {
+      const serviceName = mod.__definition.key
+
+      if (this.modulesMap.has(serviceName)) {
         throw new Error(
-          `Duplicated instance of module ${mod.__definition.key} is not allowed.`
+          `Duplicated instance of module ${serviceName} is not allowed.`
         )
       }
 
-      this.modulesMap.set(mod.__definition.key, mod)
+      this.modulesMap.set(serviceName, mod)
       servicesConfig.push(mod.__joinerConfig)
     }
 
+    this.customRemoteFetchData = customRemoteFetchData
     this.remoteJoiner = new RemoteJoiner(
-      servicesConfig,
-      remoteFetchData ?? this.remoteFetchData.bind(this)
+      servicesConfig as JoinerServiceConfig[],
+      this.remoteFetchData.bind(this)
     )
   }
 
@@ -69,14 +67,20 @@ export class RemoteQuery {
 
   private static getAllFieldsAndRelations(
     data: any,
-    prefix = ""
-  ): { select: string[]; relations: string[] } {
+    prefix = "",
+    args: Record<string, unknown[]> = {}
+  ): {
+    select: string[]
+    relations: string[]
+    args: Record<string, unknown[]>
+  } {
     let fields: Set<string> = new Set()
     let relations: string[] = []
 
     data.fields?.forEach((field: string) => {
       fields.add(prefix ? `${prefix}.${field}` : field)
     })
+    args[prefix] = data.args
 
     if (data.expands) {
       for (const property in data.expands) {
@@ -87,7 +91,8 @@ export class RemoteQuery {
 
         const result = RemoteQuery.getAllFieldsAndRelations(
           data.expands[property],
-          newPrefix
+          newPrefix,
+          args
         )
 
         result.select.forEach(fields.add, fields)
@@ -95,7 +100,7 @@ export class RemoteQuery {
       }
     }
 
-    return { select: [...fields], relations }
+    return { select: [...fields], relations, args }
   }
 
   private hasPagination(options: { [attr: string]: unknown }): boolean {
@@ -126,6 +131,13 @@ export class RemoteQuery {
     data: unknown[] | { [path: string]: unknown }
     path?: string
   }> {
+    if (this.customRemoteFetchData) {
+      const resp = await this.customRemoteFetchData(expand, keyField, ids)
+      if (resp !== undefined) {
+        return resp
+      }
+    }
+
     const serviceConfig = expand.serviceConfig
     const service = this.modulesMap.get(serviceConfig.serviceName)!
 
@@ -196,9 +208,14 @@ export class RemoteQuery {
     }
   }
 
-  public async query(query: string, variables: any = {}): Promise<any> {
-    return await this.remoteJoiner.query(
-      RemoteJoiner.parseQuery(query, variables)
-    )
+  public async query(
+    query: string | RemoteJoinerQuery,
+    variables?: Record<string, unknown>
+  ): Promise<any> {
+    const finalQuery = isString(query)
+      ? RemoteJoiner.parseQuery(query, variables)
+      : query
+
+    return await this.remoteJoiner.query(finalQuery)
   }
 }

packages/orchestration/jest.config.js

@@ -1,12 +1,12 @@
 module.exports = {
-  globals: {
-    "ts-jest": {
-      tsConfig: "tsconfig.json",
-      isolatedModules: false,
-    },
-  },
   transform: {
-    "^.+\\.[jt]s?$": "ts-jest",
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsConfig: "tsconfig.json",
+        isolatedModules: true,
+      },
+    ],
   },
   testEnvironment: `node`,
   moduleFileExtensions: [`js`, `ts`],

packages/orchestration/package.json

@@ -19,10 +19,10 @@
   "devDependencies": {
     "@medusajs/types": "^1.10.2",
     "cross-env": "^5.2.1",
-    "jest": "^25.5.4",
+    "jest": "^29.6.3",
     "rimraf": "^5.0.1",
-    "ts-jest": "^25.5.1",
-    "typescript": "^4.4.4"
+    "ts-jest": "^29.1.1",
+    "typescript": "^5.1.6"
   },
   "dependencies": {
     "@medusajs/utils": "^1.9.6",

packages/orchestration/src/__tests__/joiner/graphql-ast.ts

@@ -274,4 +274,85 @@ describe("RemoteJoiner.parseQuery", () => {
       ],
     })
   })
+
+  it("Nested query with fields and directives", async () => {
+    const graphqlQuery = `
+      query {
+        order(regularArgs: 123) {
+          id
+          number @include(if: "date > '2020-01-01'")
+          date
+          products {
+            product_id 
+            variant_id
+            variant @count {
+              name @lowerCase
+              sku @include(if: "name == 'test'")
+            }
+          }
+        }
+      }
+    `
+    const parser = new GraphQLParser(graphqlQuery)
+    const rjQuery = parser.parseQuery()
+
+    expect(rjQuery).toEqual({
+      alias: "order",
+      fields: ["id", "number", "date", "products"],
+      expands: [
+        {
+          property: "products",
+          fields: ["product_id", "variant_id", "variant"],
+          directives: {
+            variant: [
+              {
+                name: "count",
+              },
+            ],
+          },
+        },
+        {
+          property: "products.variant",
+          fields: ["name", "sku"],
+          directives: {
+            name: [
+              {
+                name: "lowerCase",
+              },
+            ],
+            sku: [
+              {
+                name: "include",
+                args: [
+                  {
+                    name: "if",
+                    value: "name == 'test'",
+                  },
+                ],
+              },
+            ],
+          },
+        },
+      ],
+      args: [
+        {
+          name: "regularArgs",
+          value: 123,
+        },
+      ],
+      directives: {
+        number: [
+          {
+            name: "include",
+            args: [
+              {
+                name: "if",
+                value: "date > '2020-01-01'",
+              },
+            ],
+          },
+        ],
+      },
+    })
+  })
 })

packages/orchestration/src/joiner/graphql-ast.ts

@@ -1,6 +1,7 @@
 import { RemoteJoinerQuery } from "@medusajs/types"
 import {
   ArgumentNode,
+  DirectiveNode,
   DocumentNode,
   FieldNode,
   Kind,
@@ -15,18 +16,24 @@ interface Argument {
   value?: unknown
 }
 
+interface Directive {
+  name: string
+  args?: Argument[]
+}
+
 interface Entity {
   property: string
   fields: string[]
   args?: Argument[]
+  directives?: { [field: string]: Directive[] }
 }
 
 class GraphQLParser {
   private ast: DocumentNode
 
-  constructor(input: string, private variables?: { [key: string]: unknown }) {
+  constructor(input: string, private variables: Record<string, unknown> = {}) {
     this.ast = parse(input)
-    this.variables = variables || {}
+    this.variables = variables
   }
 
   private parseValueNode(valueNode: ValueNode): unknown {
@@ -75,6 +82,33 @@ class GraphQLParser {
     })
   }
 
+  private parseDirectives(directives: readonly DirectiveNode[]): Directive[] {
+    return directives.map((directive) => ({
+      name: directive.name.value,
+      args: this.parseArguments(directive.arguments || []),
+    }))
+  }
+
+  private createDirectivesMap(selectionSet: SelectionSetNode):
+    | {
+        [field: string]: Directive[]
+      }
+    | undefined {
+    const directivesMap: { [field: string]: Directive[] } = {}
+    let hasDirectives = false
+    selectionSet.selections.forEach((field) => {
+      const fieldName = (field as FieldNode).name.value
+      const fieldDirectives = this.parseDirectives(
+        (field as FieldNode).directives || []
+      )
+      if (fieldDirectives.length > 0) {
+        hasDirectives = true
+        directivesMap[fieldName] = fieldDirectives
+      }
+    })
+    return hasDirectives ? directivesMap : undefined
+  }
+
   private extractEntities(
     node: SelectionSetNode,
     parentName = "",
@@ -98,7 +132,8 @@ class GraphQLParser {
           fields: fieldNode.selectionSet.selections.map(
             (field) => (field as FieldNode).name.value
           ),
-          args: this.parseArguments(fieldNode.arguments!),
+          args: this.parseArguments(fieldNode.arguments || []),
+          directives: this.createDirectivesMap(fieldNode.selectionSet),
         }
 
         entities.push(nestedEntity)
@@ -126,8 +161,8 @@ class GraphQLParser {
 
     const rootFieldNode = queryDefinition.selectionSet
       .selections[0] as FieldNode
-
     const propName = rootFieldNode.name.value
+
     const remoteJoinConfig: RemoteJoinerQuery = {
       alias: propName,
       fields: [],
@@ -142,7 +177,9 @@ class GraphQLParser {
       remoteJoinConfig.fields = rootFieldNode.selectionSet.selections.map(
         (field) => (field as FieldNode).name.value
       )
-
+      remoteJoinConfig.directives = this.createDirectivesMap(
+        rootFieldNode.selectionSet
+      )
       remoteJoinConfig.expands = this.extractEntities(
         rootFieldNode.selectionSet,
         propName,

packages/orchestration/src/joiner/remote-joiner.ts

@@ -2,14 +2,27 @@ import {
   JoinerRelationship,
   JoinerServiceConfig,
   JoinerServiceConfigAlias,
+  ModuleJoinerConfig,
   RemoteExpandProperty,
   RemoteJoinerQuery,
   RemoteNestedExpands,
 } from "@medusajs/types"
+
 import { isDefined } from "@medusajs/utils"
 import GraphQLParser from "./graphql-ast"
 
 const BASE_PATH = "_root"
+
+export type RemoteFetchDataCallback = (
+  expand: RemoteExpandProperty,
+  keyField: string,
+  ids?: (unknown | unknown[])[],
+  relationship?: any
+) => Promise<{
+  data: unknown[] | { [path: string]: unknown }
+  path?: string
+}>
+
 export class RemoteJoiner {
   private serviceConfigCache: Map<string, JoinerServiceConfig> = new Map()
 
@@ -18,7 +31,7 @@ export class RemoteJoiner {
     fields: string[],
     expands?: RemoteNestedExpands
   ): Record<string, unknown> {
-    if (!fields) {
+    if (!fields || !data) {
       return data
     }
 
@@ -78,44 +91,29 @@ export class RemoteJoiner {
     }, {})
   }
 
-  static parseQuery(graphqlQuery: string, variables?: any): RemoteJoinerQuery {
+  static parseQuery(
+    graphqlQuery: string,
+    variables?: Record<string, unknown>
+  ): RemoteJoinerQuery {
     const parser = new GraphQLParser(graphqlQuery, variables)
     return parser.parseQuery()
   }
 
   constructor(
-    private serviceConfigs: JoinerServiceConfig[],
-    private remoteFetchData: (
-      expand: RemoteExpandProperty,
-      keyField: string,
-      ids?: (unknown | unknown[])[],
-      relationship?: any
-    ) => Promise<{
-      data: unknown[] | { [path: string]: unknown }
-      path?: string
-    }>
+    private serviceConfigs: ModuleJoinerConfig[],
+    private remoteFetchData: RemoteFetchDataCallback
   ) {
     this.serviceConfigs = this.buildReferences(serviceConfigs)
   }
 
-  public setFetchDataCallback(
-    remoteFetchData: (
-      expand: RemoteExpandProperty,
-      keyField: string,
-      ids?: (unknown | unknown[])[],
-      relationship?: any
-    ) => Promise<{
-      data: unknown[] | { [path: string]: unknown }
-      path?: string
-    }>
-  ): void {
+  public setFetchDataCallback(remoteFetchData: RemoteFetchDataCallback): void {
     this.remoteFetchData = remoteFetchData
   }
 
-  private buildReferences(serviceConfigs: JoinerServiceConfig[]) {
+  private buildReferences(serviceConfigs: ModuleJoinerConfig[]) {
     const expandedRelationships: Map<string, JoinerRelationship[]> = new Map()
     for (const service of serviceConfigs) {
-      if (this.serviceConfigCache.has(service.serviceName)) {
+      if (this.serviceConfigCache.has(service.serviceName!)) {
         throw new Error(`Service "${service.serviceName}" is already defined.`)
       }
 
@@ -124,38 +122,42 @@ export class RemoteJoiner {
       }
 
       // add aliases
-      if (!service.alias) {
-        service.alias = [{ name: service.serviceName.toLowerCase() }]
-      } else if (!Array.isArray(service.alias)) {
-        service.alias = [service.alias]
-      }
-
-      // self-reference
-      for (const alias of service.alias) {
-        if (this.serviceConfigCache.has(`alias_${alias.name}}`)) {
-          const defined = this.serviceConfigCache.get(`alias_${alias.name}}`)
-          throw new Error(
-            `Cannot add alias "${alias.name}" for "${service.serviceName}". It is already defined for Service "${defined?.serviceName}".`
-          )
+      const isReadOnlyDefinition =
+        service.serviceName === undefined || service.isReadOnlyLink
+      if (!isReadOnlyDefinition) {
+        if (!service.alias) {
+          service.alias = [{ name: service.serviceName!.toLowerCase() }]
+        } else if (!Array.isArray(service.alias)) {
+          service.alias = [service.alias]
         }
 
-        const args =
-          service.args || alias.args
-            ? { ...service.args, ...alias.args }
-            : undefined
+        // self-reference
+        for (const alias of service.alias) {
+          if (this.serviceConfigCache.has(`alias_${alias.name}}`)) {
+            const defined = this.serviceConfigCache.get(`alias_${alias.name}}`)
+            throw new Error(
+              `Cannot add alias "${alias.name}" for "${service.serviceName}". It is already defined for Service "${defined?.serviceName}".`
+            )
+          }
 
-        service.relationships?.push({
-          alias: alias.name,
-          foreignKey: alias.name + "_id",
-          primaryKey: "id",
-          serviceName: service.serviceName,
-          args,
-        })
-        this.cacheServiceConfig(serviceConfigs, undefined, alias.name)
+          const args =
+            service.args || alias.args
+              ? { ...service.args, ...alias.args }
+              : undefined
+
+          service.relationships?.push({
+            alias: alias.name,
+            foreignKey: alias.name + "_id",
+            primaryKey: "id",
+            serviceName: service.serviceName!,
+            args,
+          })
+          this.cacheServiceConfig(serviceConfigs, undefined, alias.name)
+        }
+
+        this.cacheServiceConfig(serviceConfigs, service.serviceName)
       }
 
-      this.cacheServiceConfig(serviceConfigs, service.serviceName)
-
       if (!service.extends) {
         continue
       }
@@ -295,7 +297,7 @@ export class RemoteJoiner {
       Map<string, RemoteExpandProperty>,
       string,
       Set<string>
-    ][] = [[items, query, parsedExpands, "", new Set()]]
+    ][] = [[items, query, parsedExpands, BASE_PATH, new Set()]]
 
     while (stack.length > 0) {
       const [
@@ -307,9 +309,7 @@ export class RemoteJoiner {
       ] = stack.pop()!
 
       for (const [expandedPath, expand] of currentParsedExpands.entries()) {
-        const isImmediateChildPath =
-          expandedPath.startsWith(basePath) &&
-          expandedPath.split(".").length === basePath.split(".").length + 1
+        const isImmediateChildPath = basePath === expand.parent
 
         if (!isImmediateChildPath || resolvedPaths.has(expandedPath)) {
           continue
@@ -433,7 +433,8 @@ export class RemoteJoiner {
           item[relationship.alias] = item[field]
             .map((id) => {
               if (relationship.isList && !Array.isArray(relatedDataMap[id])) {
-                relatedDataMap[id] = [relatedDataMap[id]]
+                relatedDataMap[id] =
+                  relatedDataMap[id] !== undefined ? [relatedDataMap[id]] : []
               }
 
               return relatedDataMap[id]
@@ -441,7 +442,10 @@ export class RemoteJoiner {
             .filter((relatedItem) => relatedItem !== undefined)
         } else {
           if (relationship.isList && !Array.isArray(relatedDataMap[itemKey])) {
-            relatedDataMap[itemKey] = [relatedDataMap[itemKey]]
+            relatedDataMap[itemKey] =
+              relatedDataMap[itemKey] !== undefined
+                ? [relatedDataMap[itemKey]]
+                : []
           }
 
           item[relationship.alias] = relatedDataMap[itemKey]
@@ -539,13 +543,13 @@ export class RemoteJoiner {
             serviceConfig: currentServiceConfig,
             fields,
             args,
+            parent: [BASE_PATH, ...currentPath].join("."),
           })
         }
 
         currentPath.push(prop)
       }
     }
-
     return parsedExpands
   }
 
@@ -566,7 +570,7 @@ export class RemoteJoiner {
     for (const [path, expand] of sortedParsedExpands.entries()) {
       const currentServiceName = expand.serviceConfig.serviceName
 
-      let parentPath = path.split(".").slice(0, -1).join(".")
+      let parentPath = expand.parent
 
       // Check if the parentPath was merged before
       while (mergedPaths.has(parentPath)) {
@@ -580,6 +584,7 @@ export class RemoteJoiner {
 
         if (parentExpand.serviceConfig.serviceName === currentServiceName) {
           const nestedKeys = path.split(".").slice(parentPath.split(".").length)
+
           let targetExpand: any = parentExpand
 
           for (let key of nestedKeys) {
@@ -633,6 +638,7 @@ export class RemoteJoiner {
     const parsedExpands = this.parseExpands(
       {
         property: "",
+        parent: "",
         serviceConfig: serviceConfig,
         fields: queryObj.fields,
         args: otherArgs,

packages/pricing/integration-tests/setup-env.js

@@ -1,6 +1,6 @@
 if (typeof process.env.DB_TEMP_NAME === "undefined") {
   const tempName = parseInt(process.env.JEST_WORKER_ID || "1")
-  process.env.DB_TEMP_NAME = `medusa-integration-${tempName}`
+  process.env.DB_TEMP_NAME = `medusa-pricing-integration-${tempName}`
 }
 
 process.env.MEDUSA_PRICING_DB_SCHEMA = "public"

packages/product/integration-tests/__tests__/services/product/index.ts

@@ -13,12 +13,12 @@ import {
 } from "../../../__fixtures__/product/data"
 
 import { ProductDTO, ProductTypes } from "@medusajs/types"
+import { kebabCase } from "@medusajs/utils"
+import { SqlEntityManager } from "@mikro-orm/postgresql"
 import { ProductRepository } from "@repositories"
 import { ProductService } from "@services"
-import { SqlEntityManager } from "@mikro-orm/postgresql"
-import { TestDatabase } from "../../../utils"
 import { createProductCategories } from "../../../__fixtures__/product-category"
-import { kebabCase } from "@medusajs/utils"
+import { TestDatabase } from "../../../utils"
 
 jest.setTimeout(30000)
 
@@ -513,7 +513,7 @@ describe("Product Service", () => {
       const products = await service.create([data])
       const product = products[0]
       await service.softDelete([product.id])
-      const restoreProducts = await service.restore([product.id])
+      const [restoreProducts] = await service.restore([product.id])
 
       expect(restoreProducts).toHaveLength(1)
       expect(restoreProducts[0].deleted_at).toBeNull()

packages/product/jest.config.js

@@ -4,14 +4,14 @@ module.exports = {
     "^@services": "<rootDir>/src/services",
     "^@repositories": "<rootDir>/src/repositories",
   },
-  globals: {
-    "ts-jest": {
-      tsConfig: "tsconfig.spec.json",
-      isolatedModules: false,
-    },
-  },
   transform: {
-    "^.+\\.[jt]s?$": "ts-jest",
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsConfig: "tsconfig.spec.json",
+        isolatedModules: true,
+      },
+    ],
   },
   testEnvironment: `node`,
   moduleFileExtensions: [`js`, `ts`],

packages/product/package.json

@@ -39,14 +39,14 @@
     "@mikro-orm/cli": "5.7.12",
     "cross-env": "^5.2.1",
     "faker": "^6.6.6",
-    "jest": "^25.5.4",
+    "jest": "^29.6.3",
     "medusa-test-utils": "^1.1.40",
     "pg-god": "^1.0.12",
     "rimraf": "^3.0.2",
-    "ts-jest": "^25.5.1",
+    "ts-jest": "^29.1.1",
     "ts-node": "^10.9.1",
     "tsc-alias": "^1.8.6",
-    "typescript": "^4.4.4"
+    "typescript": "^5.1.6"
   },
   "dependencies": {
     "@medusajs/modules-sdk": "^1.9.2",

packages/product/src/initialize/index.ts

@@ -1,13 +1,14 @@
 import {
   ExternalModuleDeclaration,
   InternalModuleDeclaration,
-  MedusaModule,
   MODULE_PACKAGE_NAMES,
+  MedusaModule,
   Modules,
 } from "@medusajs/modules-sdk"
 import { IProductModuleService, ModulesSdkTypes } from "@medusajs/types"
-import { moduleDefinition } from "../module-definition"
+
 import { InitializeModuleInjectableDependencies } from "../types"
+import { moduleDefinition } from "../module-definition"
 
 export const initialize = async (
   options?:

packages/product/src/joiner-config.ts

@@ -1,5 +1,6 @@
 import { Modules } from "@medusajs/modules-sdk"
-import { JoinerServiceConfig } from "@medusajs/types"
+import { ModuleJoinerConfig } from "@medusajs/types"
+import { MapToConfig } from "@medusajs/utils"
 import {
   Product,
   ProductCategory,
@@ -10,10 +11,9 @@ import {
   ProductVariant,
 } from "@models"
 import ProductImage from "./models/product-image"
-import { MapToConfig } from "@medusajs/utils"
 
 export enum LinkableKeys {
-  PRODUCT_ID = "product_id",
+  PRODUCT_ID = "product_id", // Main service ID must the first
   PRODUCT_HANDLE = "product_handle",
   VARIANT_ID = "variant_id",
   VARIANT_SKU = "variant_sku",
@@ -55,9 +55,10 @@ export const entityNameToLinkableKeysMap: MapToConfig = {
   ],
 }
 
-export const joinerConfig: JoinerServiceConfig = {
+export const joinerConfig: ModuleJoinerConfig = {
   serviceName: Modules.PRODUCT,
   primaryKeys: ["id", "handle"],
+  linkableKeys: Object.values(LinkableKeys),
   alias: [
     {
       name: "product",

packages/product/src/services/product-module-service.ts

@@ -1,12 +1,15 @@
 import {
-  ProductCategoryService,
-  ProductCollectionService,
-  ProductOptionService,
-  ProductService,
-  ProductTagService,
-  ProductTypeService,
-  ProductVariantService,
-} from "@services"
+  Context,
+  CreateProductOnlyDTO,
+  DAL,
+  FindConfig,
+  IEventBusModuleService,
+  InternalModuleDeclaration,
+  ModuleJoinerConfig,
+  ProductTypes,
+  RestoreReturn,
+  SoftDeleteReturn,
+} from "@medusajs/types"
 import {
   Image,
   Product,
@@ -18,15 +21,14 @@ import {
   ProductVariant,
 } from "@models"
 import {
-  Context,
-  CreateProductOnlyDTO,
-  DAL,
-  FindConfig,
-  IEventBusModuleService,
-  InternalModuleDeclaration,
-  JoinerServiceConfig,
-  ProductTypes,
-} from "@medusajs/types"
+  ProductCategoryService,
+  ProductCollectionService,
+  ProductOptionService,
+  ProductService,
+  ProductTagService,
+  ProductTypeService,
+  ProductVariantService,
+} from "@services"
 
 import ProductImageService from "./product-image"
 
@@ -136,7 +138,7 @@ export default class ProductModuleService<
     this.eventBusModuleService_ = eventBusModuleService
   }
 
-  __joinerConfig(): JoinerServiceConfig {
+  __joinerConfig(): ModuleJoinerConfig {
     return joinerConfig
   }
 
@@ -1071,11 +1073,7 @@ export default class ProductModuleService<
     >
   >(
     productIds: string[],
-    {
-      returnLinkableKeys,
-    }: { returnLinkableKeys?: TReturnableLinkableKeys[] } = {
-      returnLinkableKeys: [],
-    },
+    { returnLinkableKeys }: SoftDeleteReturn<TReturnableLinkableKeys> = {},
     sharedContext: Context = {}
   ): Promise<Record<Lowercase<keyof typeof LinkableKeys>, string[]> | void> {
     const [products, cascadedEntitiesMap] = await this.softDelete_(
@@ -1098,10 +1096,12 @@ export default class ProductModuleService<
 
     let mappedCascadedEntitiesMap
     if (returnLinkableKeys) {
+      // Map internal table/column names to their respective external linkable keys
+      // eg: product.id = product_id, variant.id = variant_id
       mappedCascadedEntitiesMap = mapObjectTo<
         Record<Lowercase<keyof typeof LinkableKeys>, string[]>
       >(cascadedEntitiesMap, entityNameToLinkableKeysMap, {
-        pick: returnLinkableKeys as string[],
+        pick: returnLinkableKeys,
       })
     }
 
@@ -1116,22 +1116,39 @@ export default class ProductModuleService<
     return await this.productService_.softDelete(productIds, sharedContext)
   }
 
-  async restore(
+  async restore<
+    TReturnableLinkableKeys extends string = Lowercase<
+      keyof typeof LinkableKeys
+    >
+  >(
     productIds: string[],
+    { returnLinkableKeys }: RestoreReturn<TReturnableLinkableKeys> = {},
     sharedContext: Context = {}
-  ): Promise<ProductTypes.ProductDTO[]> {
-    const products = await this.restore_(productIds, sharedContext)
+  ): Promise<Record<Lowercase<keyof typeof LinkableKeys>, string[]> | void> {
+    const [_, cascadedEntitiesMap] = await this.restore_(
+      productIds,
+      sharedContext
+    )
 
-    return this.baseRepository_.serialize<ProductTypes.ProductDTO[]>(products, {
-      populate: true,
-    })
+    let mappedCascadedEntitiesMap
+    if (returnLinkableKeys) {
+      // Map internal table/column names to their respective external linkable keys
+      // eg: product.id = product_id, variant.id = variant_id
+      mappedCascadedEntitiesMap = mapObjectTo<
+        Record<Lowercase<keyof typeof LinkableKeys>, string[]>
+      >(cascadedEntitiesMap, entityNameToLinkableKeysMap, {
+        pick: returnLinkableKeys,
+      })
+    }
+
+    return mappedCascadedEntitiesMap ? mappedCascadedEntitiesMap : void 0
   }
 
   @InjectTransactionManager(shouldForceTransaction, "baseRepository_")
   async restore_(
     productIds: string[],
     @MedusaContext() sharedContext: Context = {}
-  ): Promise<TProduct[]> {
+  ): Promise<[TProduct[], Record<string, unknown[]>]> {
     return await this.productService_.restore(productIds, sharedContext)
   }
 }

packages/product/src/services/product.ts

@@ -1,4 +1,3 @@
-import { Product } from "@models"
 import {
   Context,
   DAL,
@@ -9,12 +8,13 @@ import {
 import {
   InjectManager,
   InjectTransactionManager,
-  isDefined,
   MedusaContext,
   MedusaError,
   ModulesSdkUtils,
   ProductUtils,
+  isDefined,
 } from "@medusajs/utils"
+import { Product } from "@models"
 import { ProductRepository } from "@repositories"
 
 import { ProductServiceTypes } from "../types/services"
@@ -178,7 +178,7 @@ export default class ProductService<TEntity extends Product = Product> {
   async restore(
     productIds: string[],
     @MedusaContext() sharedContext: Context = {}
-  ): Promise<TEntity[]> {
+  ): Promise<[TEntity[], Record<string, unknown[]>]> {
     return await this.productRepository_.restore(productIds, {
       transactionManager: sharedContext.transactionManager,
     })

packages/stock-location/jest.config.js

@@ -1,12 +1,12 @@
 module.exports = {
-  globals: {
-    "ts-jest": {
-      tsConfig: "tsconfig.spec.json",
-      isolatedModules: false,
-    },
-  },
   transform: {
-    "^.+\\.[jt]s?$": "ts-jest",
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsConfig: "tsconfig.spec.json",
+        isolatedModules: true,
+      },
+    ],
   },
   testEnvironment: `node`,
   moduleFileExtensions: [`js`, `ts`],

packages/stock-location/package.json

@@ -19,10 +19,10 @@
   "devDependencies": {
     "@medusajs/types": "^1.8.8",
     "cross-env": "^5.2.1",
-    "jest": "^25.5.4",
+    "jest": "^29.6.3",
     "rimraf": "^5.0.1",
-    "ts-jest": "^25.5.1",
-    "typescript": "^4.4.4"
+    "ts-jest": "^29.1.1",
+    "typescript": "^5.1.6"
   },
   "dependencies": {
     "@medusajs/modules-sdk": "^1.8.8",

packages/stock-location/src/joiner-config.ts

@@ -1,9 +1,10 @@
+import { ModuleJoinerConfig } from "@medusajs/types"
 import { Modules } from "@medusajs/modules-sdk"
-import { JoinerServiceConfig } from "@medusajs/types"
 
-export const joinerConfig: JoinerServiceConfig = {
+export const joinerConfig: ModuleJoinerConfig = {
   serviceName: Modules.STOCK_LOCATION,
   primaryKeys: ["id"],
+  linkableKeys: ["stock_location_id"],
   alias: [
     {
       name: "stock_location",

packages/stock-location/src/services/stock-location.ts

@@ -4,8 +4,8 @@ import {
   FilterableStockLocationProps,
   FindConfig,
   IEventBusService,
-  JoinerServiceConfig,
   MODULE_RESOURCE_TYPE,
+  ModuleJoinerConfig,
   SharedContext,
   StockLocationAddressInput,
   UpdateStockLocationInput,
@@ -50,7 +50,7 @@ export default class StockLocationService {
     this.eventBusService_ = eventBusService
   }
 
-  __joinerConfig(): JoinerServiceConfig {
+  __joinerConfig(): ModuleJoinerConfig {
     return joinerConfig
   }
 

packages/types/package.json

@@ -23,7 +23,7 @@
     "ioredis": "^5.2.5",
     "rimraf": "^5.0.1",
     "typeorm": "^0.3.16",
-    "typescript": "^4.4.4",
+    "typescript": "^5.1.6",
     "winston": "^3.8.2"
   },
   "scripts": {

packages/types/src/dal/repository-service.ts

@@ -1,6 +1,6 @@
-import { FindOptions } from "./index"
 import { RepositoryTransformOptions } from "../common"
 import { Context } from "../shared-context"
+import { FindOptions } from "./index"
 
 /**
  * Data access layer (DAL) interface to implements for any repository service.
@@ -54,7 +54,10 @@ export interface RepositoryService<T = any> extends BaseRepositoryService<T> {
     context?: Context
   ): Promise<[T[], Record<string, unknown[]>]>
 
-  restore(ids: string[], context?: Context): Promise<T[]>
+  restore(
+    ids: string[],
+    context?: Context
+  ): Promise<[T[], Record<string, unknown[]>]>
 }
 
 export interface TreeRepositoryService<T = any>
@@ -75,3 +78,11 @@ export interface TreeRepositoryService<T = any>
 
   delete(id: string, context?: Context): Promise<void>
 }
+
+export type SoftDeleteReturn<TReturnableLinkableKeys = string> = {
+  returnLinkableKeys?: TReturnableLinkableKeys[]
+}
+
+export type RestoreReturn<TReturnableLinkableKeys = string> = {
+  returnLinkableKeys?: TReturnableLinkableKeys[]
+}

packages/types/src/index.ts

@@ -9,6 +9,7 @@ export * from "./feature-flag"
 export * from "./file-service"
 export * from "./inventory"
 export * from "./joiner"
+export * from "./link-modules"
 export * from "./logger"
 export * from "./modules-sdk"
 export * from "./pricing"

packages/types/src/inventory/service.ts

@@ -13,11 +13,11 @@ import {
 } from "./common"
 
 import { FindConfig } from "../common"
-import { JoinerServiceConfig } from "../joiner"
-import { SharedContext } from ".."
+import { ModuleJoinerConfig } from "../modules-sdk"
+import { SharedContext } from "../shared-context"
 
 export interface IInventoryService {
-  __joinerConfig(): JoinerServiceConfig
+  __joinerConfig(): ModuleJoinerConfig
   listInventoryItems(
     selector: FilterableInventoryItemProps,
     config?: FindConfig<InventoryItemDTO>,

packages/types/src/joiner/index.ts

@@ -28,7 +28,11 @@ export interface JoinerServiceConfig {
 export interface JoinerArgument {
   name: string
   value?: any
-  field?: string
+}
+
+export interface JoinerDirective {
+  name: string
+  value?: any
 }
 
 export interface RemoteJoinerQuery {
@@ -38,10 +42,11 @@ export interface RemoteJoinerQuery {
     property: string
     fields: string[]
     args?: JoinerArgument[]
-    relationships?: JoinerRelationship[]
+    directives?: { [field: string]: JoinerDirective[] }
   }>
   fields: string[]
   args?: JoinerArgument[]
+  directives?: { [field: string]: JoinerDirective[] }
 }
 
 export interface RemoteNestedExpands {
@@ -54,6 +59,7 @@ export interface RemoteNestedExpands {
 
 export interface RemoteExpandProperty {
   property: string
+  parent: string
   serviceConfig: JoinerServiceConfig
   fields: string[]
   args?: JoinerArgument[]

packages/types/src/link-modules/index.ts

@@ -0,0 +1,49 @@
+import { FindConfig } from "../common"
+import { RestoreReturn, SoftDeleteReturn } from "../dal"
+import { ModuleJoinerConfig } from "../modules-sdk"
+import { Context } from "../shared-context"
+
+export interface ILinkModule {
+  __joinerConfig(): ModuleJoinerConfig
+
+  list(
+    filters?: Record<string, unknown>,
+    config?: FindConfig<unknown>,
+    sharedContext?: Context
+  ): Promise<unknown[]>
+
+  listAndCount(
+    filters?: Record<string, unknown>,
+    config?: FindConfig<unknown>,
+    sharedContext?: Context
+  ): Promise<[unknown[], number]>
+
+  create(
+    primaryKeyOrBulkData:
+      | string
+      | string[]
+      | [string | string[], string, Record<string, unknown>?][],
+    foreignKeyData?: string,
+    sharedContext?: Context
+  ): Promise<unknown[]>
+
+  dismiss(
+    primaryKeyOrBulkData: string | string[] | [string | string[], string][],
+    foreignKeyData?: string,
+    sharedContext?: Context
+  ): Promise<unknown[]>
+
+  delete(data: unknown | unknown[], sharedContext?: Context): Promise<void>
+
+  softDelete(
+    data: unknown | unknown[],
+    config?: SoftDeleteReturn,
+    sharedContext?: Context
+  ): Promise<Record<string, unknown[]> | void>
+
+  restore(
+    data: unknown | unknown[],
+    config?: RestoreReturn,
+    sharedContext?: Context
+  ): Promise<Record<string, unknown[]> | void>
+}

packages/types/src/modules-sdk/index.ts

@@ -1,7 +1,8 @@
-import { JoinerServiceConfig } from "../joiner"
-import { Logger } from "../logger"
+import { JoinerRelationship, JoinerServiceConfig } from "../joiner"
+
 import { MedusaContainer } from "../common"
 import { RepositoryService } from "../dal"
+import { Logger } from "../logger"
 
 export type Constructor<T> = new (...args: any[]) => T
 export * from "../common/medusa-container"
@@ -30,6 +31,9 @@ export type InternalModuleDeclaration = {
   scope: MODULE_SCOPE.INTERNAL
   resources: MODULE_RESOURCE_TYPE
   dependencies?: string[]
+  /**
+   * @deprecated The property should not be used.
+   */
   resolve?: string
   options?: Record<string, unknown>
   alias?: string // If multiple modules are registered with the same key, the alias can be used to differentiate them
@@ -43,6 +47,7 @@ export type ExternalModuleDeclaration = {
     url: string
     keepAlive: boolean
   }
+  options?: Record<string, unknown>
   alias?: string // If multiple modules are registered with the same key, the alias can be used to differentiate them
   main?: boolean // If the module is the main module for the key when multiple ones are registered
 }
@@ -61,17 +66,38 @@ export type ModuleDefinition = {
   registrationName: string
   defaultPackage: string | false
   label: string
+  /**
+   * @deprecated property will be removed in future versions
+   */
   canOverride?: boolean
+  /**
+   * @deprecated property will be removed in future versions
+   */
   isRequired?: boolean
-  isQueryable?: boolean // If the modules should be queryable via Remote Joiner
+  isQueryable?: boolean // If the module is queryable via Remote Joiner
   dependencies?: string[]
   defaultModuleDeclaration:
     | InternalModuleDeclaration
     | ExternalModuleDeclaration
 }
 
+export type LinkModuleDefinition = {
+  key: string
+  registrationName: string
+  label: string
+  dependencies?: string[]
+  defaultModuleDeclaration: InternalModuleDeclaration
+}
+
+type ModuleDeclaration = ExternalModuleDeclaration | InternalModuleDeclaration
+export type ModuleConfig = ModuleDeclaration & {
+  module: string
+  path: string
+  definition: ModuleDefinition
+}
+
 export type LoadedModule = unknown & {
-  __joinerConfig: JoinerServiceConfig
+  __joinerConfig: ModuleJoinerConfig
   __definition: ModuleDefinition
 }
 
@@ -91,6 +117,60 @@ export type ModulesResponse = {
   resolution: string | false
 }[]
 
+export type ModuleJoinerConfig = Omit<
+  JoinerServiceConfig,
+  "serviceName" | "primaryKeys" | "relationships" | "extends"
+> & {
+  relationships?: ModuleJoinerRelationship[]
+  extends?: {
+    serviceName: string
+    relationship: ModuleJoinerRelationship
+  }[]
+  serviceName?: string
+  primaryKeys?: string[]
+  isLink?: boolean // If the module is a link module
+  linkableKeys?: string[] // Keys that can be used to link to other modules
+  isReadOnlyLink?: boolean // If true it expands a RemoteQuery property but doesn't create a pivot table
+  databaseConfig?: {
+    tableName?: string // Name of the pivot table. If not provided it is auto generated
+    idPrefix?: string // Prefix for the id column. If not provided it is "link"
+    extraFields?: Record<
+      string,
+      {
+        type:
+          | "date"
+          | "time"
+          | "datetime"
+          | "bigint"
+          | "blob"
+          | "uint8array"
+          | "array"
+          | "enumArray"
+          | "enum"
+          | "json"
+          | "integer"
+          | "smallint"
+          | "tinyint"
+          | "mediumint"
+          | "float"
+          | "double"
+          | "boolean"
+          | "decimal"
+          | "string"
+          | "uuid"
+          | "text"
+        defaultValue?: string
+        nullable?: boolean
+        options?: Record<string, unknown> // Mikro-orm options for the column
+      }
+    >
+  }
+}
+
+export declare type ModuleJoinerRelationship = JoinerRelationship & {
+  deleteCascade?: boolean // If true, the link joiner will cascade deleting the relationship
+}
+
 export type ModuleExports = {
   service: Constructor<any>
   loaders?: ModuleLoaderFunction[]
@@ -114,6 +194,11 @@ export interface ModuleServiceInitializeOptions {
     connection?: any
     clientUrl?: string
     schema?: string
+    host?: string
+    port?: number
+    user?: string
+    password?: string
+    database?: string
     driverOptions?: Record<string, unknown>
     debug?: boolean
   }

packages/types/src/product/service.ts

@@ -27,12 +27,13 @@ import {
   UpdateProductTypeDTO,
 } from "./common"
 
-import { Context } from "../shared-context"
 import { FindConfig } from "../common"
-import { JoinerServiceConfig } from "../joiner"
+import { RestoreReturn, SoftDeleteReturn } from "../dal"
+import { ModuleJoinerConfig } from "../modules-sdk"
+import { Context } from "../shared-context"
 
 export interface IProductModuleService {
-  __joinerConfig(): JoinerServiceConfig
+  __joinerConfig(): ModuleJoinerConfig
 
   retrieve(
     productId: string,
@@ -241,9 +242,13 @@ export interface IProductModuleService {
 
   softDelete<TReturnableLinkableKeys extends string = string>(
     productIds: string[],
-    config?: { returnLinkableKeys?: TReturnableLinkableKeys[] },
+    config?: SoftDeleteReturn<TReturnableLinkableKeys>,
     sharedContext?: Context
   ): Promise<Record<string, string[]> | void>
 
-  restore(productIds: string[], sharedContext?: Context): Promise<ProductDTO[]>
+  restore<TReturnableLinkableKeys extends string = string>(
+    productIds: string[],
+    config?: RestoreReturn<TReturnableLinkableKeys>,
+    sharedContext?: Context
+  ): Promise<Record<string, string[]> | void>
 }

packages/types/src/stock-location/service.ts

@@ -1,6 +1,3 @@
-import { FindConfig } from "../common/common"
-import { JoinerServiceConfig } from "../joiner"
-import { SharedContext } from "../shared-context"
 import {
   CreateStockLocationInput,
   FilterableStockLocationProps,
@@ -8,8 +5,12 @@ import {
   UpdateStockLocationInput,
 } from "./common"
 
+import { FindConfig } from "../common/common"
+import { ModuleJoinerConfig } from "../modules-sdk"
+import { SharedContext } from "../shared-context"
+
 export interface IStockLocationService {
-  __joinerConfig(): JoinerServiceConfig
+  __joinerConfig(): ModuleJoinerConfig
   list(
     selector: FilterableStockLocationProps,
     config?: FindConfig<StockLocationDTO>,

packages/utils/jest.config.js

@@ -1,12 +1,12 @@
 module.exports = {
-  globals: {
-    "ts-jest": {
-      tsConfig: "tsconfig.json",
-      isolatedModules: false,
-    },
-  },
   transform: {
-    "^.+\\.[jt]s?$": "ts-jest",
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsConfig: "tsconfig.json",
+        isolatedModules: true,
+      },
+    ],
   },
   testEnvironment: `node`,
   moduleFileExtensions: [`js`, `ts`],

packages/utils/package.json

@@ -22,10 +22,10 @@
     "@types/express": "^4.17.17",
     "cross-env": "^5.2.1",
     "express": "^4.18.2",
-    "jest": "^25.5.4",
+    "jest": "^29.6.3",
     "rimraf": "^5.0.1",
-    "ts-jest": "^25.5.1",
-    "typescript": "^4.4.4"
+    "ts-jest": "^29.1.1",
+    "typescript": "^5.1.6"
   },
   "dependencies": {
     "awilix": "^8.0.1",

packages/utils/src/dal/mikro-orm/mikro-orm-repository.ts

@@ -1,6 +1,12 @@
-import { Context, DAL, RepositoryTransformOptions } from "@medusajs/types"
+import {
+  Context,
+  DAL,
+  FilterQuery,
+  RepositoryTransformOptions,
+} from "@medusajs/types"
+import { isString } from "../../common"
 import { MedusaContext } from "../../decorators"
-import { buildQuery, InjectTransactionManager } from "../../modules-sdk"
+import { InjectTransactionManager, buildQuery } from "../../modules-sdk"
 import {
   getSoftDeletedCascadedEntitiesIdsMappedBy,
   transactionWrapper,
@@ -68,11 +74,21 @@ export abstract class MikroOrmAbstractBaseRepository<T = any>
 
   @InjectTransactionManager()
   async softDelete(
-    ids: string[],
+    idsOrFilter: string[] | FilterQuery,
     @MedusaContext()
     { transactionManager: manager }: Context = {}
   ): Promise<[T[], Record<string, unknown[]>]> {
-    const entities = await this.find({ where: { id: { $in: ids } } as any })
+    const isArray = Array.isArray(idsOrFilter)
+    const filter =
+      isArray || isString(idsOrFilter)
+        ? {
+            id: {
+              $in: isArray ? idsOrFilter : [idsOrFilter],
+            },
+          }
+        : idsOrFilter
+
+    const entities = await this.find({ where: filter as any })
     const date = new Date()
 
     await mikroOrmUpdateDeletedAtRecursively(manager, entities, date)
@@ -86,22 +102,34 @@ export abstract class MikroOrmAbstractBaseRepository<T = any>
 
   @InjectTransactionManager()
   async restore(
-    ids: string[],
+    idsOrFilter: string[] | FilterQuery,
     @MedusaContext()
     { transactionManager: manager }: Context = {}
-  ): Promise<T[]> {
-    const query = buildQuery(
-      { id: { $in: ids } },
-      {
-        withDeleted: true,
-      }
-    )
+  ): Promise<[T[], Record<string, unknown[]>]> {
+    const isArray = Array.isArray(idsOrFilter)
+    const filter =
+      isArray || isString(idsOrFilter)
+        ? {
+            id: {
+              $in: isArray ? idsOrFilter : [idsOrFilter],
+            },
+          }
+        : idsOrFilter
+
+    const query = buildQuery(filter, {
+      withDeleted: true,
+    })
 
     const entities = await this.find(query)
 
     await mikroOrmUpdateDeletedAtRecursively(manager, entities, null)
 
-    return entities
+    const softDeletedEntitiesMap = getSoftDeletedCascadedEntitiesIdsMappedBy({
+      entities,
+      restored: true,
+    })
+
+    return [entities, softDeletedEntitiesMap]
   }
 }
 

packages/utils/src/dal/repository.ts

@@ -54,7 +54,10 @@ export abstract class AbstractBaseRepository<T = any>
     context?: Context
   ): Promise<[T[], Record<string, unknown[]>]>
 
-  abstract restore(ids: string[], context?: Context): Promise<T[]>
+  abstract restore(
+    ids: string[],
+    context?: Context
+  ): Promise<[T[], Record<string, unknown[]>]>
 
   abstract getFreshManager<TManager = unknown>(): TManager
 

packages/utils/src/dal/utils.ts

@@ -47,10 +47,12 @@ export function getSoftDeletedCascadedEntitiesIdsMappedBy({
   entities,
   deletedEntitiesMap,
   getEntityName,
+  restored,
 }: {
   entities: any[]
   deletedEntitiesMap?: Map<string, any[]>
   getEntityName?: (entity: any) => string
+  restored?: boolean
 }): Record<string, any[]> {
   deletedEntitiesMap ??= new Map<string, any[]>()
   getEntityName ??= (entity) => entity.constructor.name
@@ -61,7 +63,7 @@ export function getSoftDeletedCascadedEntitiesIdsMappedBy({
       .get(entityName)
       ?.some((e) => e.id === entity.id)
 
-    if (!entity.deleted_at || shouldSkip) {
+    if ((restored ? !!entity.deleted_at : !entity.deleted_at) || shouldSkip) {
       continue
     }
 

packages/utils/src/modules-sdk/__tests__/load-database-config.spec.ts

@@ -3,15 +3,19 @@ import { loadDatabaseConfig } from "../load-module-database-config"
 describe("loadDatabaseConfig", function () {
   afterEach(() => {
     delete process.env.POSTGRES_URL
+    delete process.env.MEDUSA_POSTGRES_URL
     delete process.env.PRODUCT_POSTGRES_URL
   })
 
-  it("should return the local configuration using the environment variable", function () {
-    process.env.POSTGRES_URL = "postgres://localhost:5432/medusa"
+  it("should return the local configuration using the environment variable respecting their precedence", function () {
+    process.env.MEDUSA_POSTGRES_URL = "postgres://localhost:5432/medusa"
+    process.env.PRODUCT_POSTGRES_URL = "postgres://localhost:5432/product"
+    process.env.POSTGRES_URL = "postgres://localhost:5432/share_db"
+
     let config = loadDatabaseConfig("product")
 
     expect(config).toEqual({
-      clientUrl: process.env.POSTGRES_URL,
+      clientUrl: process.env.PRODUCT_POSTGRES_URL,
       driverOptions: {
         connection: {
           ssl: false,
@@ -21,12 +25,25 @@ describe("loadDatabaseConfig", function () {
       schema: "",
     })
 
-    delete process.env.POSTGRES_URL
-    process.env.PRODUCT_POSTGRES_URL = "postgres://localhost:5432/medusa"
+    delete process.env.PRODUCT_POSTGRES_URL
     config = loadDatabaseConfig("product")
 
     expect(config).toEqual({
-      clientUrl: process.env.PRODUCT_POSTGRES_URL,
+      clientUrl: process.env.MEDUSA_POSTGRES_URL,
+      driverOptions: {
+        connection: {
+          ssl: false,
+        },
+      },
+      debug: false,
+      schema: "",
+    })
+
+    delete process.env.MEDUSA_POSTGRES_URL
+    config = loadDatabaseConfig("product")
+
+    expect(config).toEqual({
+      clientUrl: process.env.POSTGRES_URL,
       driverOptions: {
         connection: {
           ssl: false,
@@ -127,7 +144,7 @@ describe("loadDatabaseConfig", function () {
     }
 
     expect(error.message).toEqual(
-      "No database clientUrl provided. Please provide the clientUrl through the PRODUCT_POSTGRES_URL or POSTGRES_URL environment variable or the options object in the initialize function."
+      "No database clientUrl provided. Please provide the clientUrl through the [MODULE]_POSTGRES_URL, MEDUSA_POSTGRES_URL or POSTGRES_URL environment variable or the options object in the initialize function."
     )
   })
 })

packages/utils/src/modules-sdk/load-module-database-config.ts

@@ -1,9 +1,11 @@
-import { MedusaError } from "../common"
 import { ModulesSdkTypes } from "@medusajs/types"
+import { MedusaError } from "../common"
 
 function getEnv(key: string, moduleName: string): string {
   const value =
-    process.env[`${moduleName.toUpperCase()}_${key}`] ?? process.env[`${key}`]
+    process.env[`${moduleName.toUpperCase()}_${key}`] ??
+    process.env[`MEDUSA_${key}`] ??
+    process.env[`${key}`]
   return value ?? ""
 }
 
@@ -39,6 +41,16 @@ function getDefaultDriverOptions(clientUrl: string) {
     : {}
 }
 
+function getDatabaseUrl(
+  config: ModulesSdkTypes.ModuleServiceInitializeOptions
+): string {
+  const { clientUrl, host, port, user, password, database } = config.database!
+  if (clientUrl) {
+    return clientUrl
+  }
+  return `postgres://${user}:${password}@${host}:${port}/${database}`
+}
+
 /**
  * Load the config for the database connection. The options can be retrieved
  * e.g through PRODUCT_* (e.g PRODUCT_POSTGRES_URL) or * (e.g POSTGRES_URL) environment variables or the options object.
@@ -49,11 +61,14 @@ export function loadDatabaseConfig(
   moduleName: string,
   options?: ModulesSdkTypes.ModuleServiceInitializeOptions,
   silent: boolean = false
-): ModulesSdkTypes.ModuleServiceInitializeOptions["database"] {
+): Pick<
+  ModulesSdkTypes.ModuleServiceInitializeOptions["database"],
+  "clientUrl" | "schema" | "driverOptions" | "debug"
+> {
   const clientUrl = getEnv("POSTGRES_URL", moduleName)
 
   const database = {
-    clientUrl: getEnv("POSTGRES_URL", moduleName),
+    clientUrl,
     schema: getEnv("POSTGRES_SCHEMA", moduleName) ?? "public",
     driverOptions: JSON.parse(
       getEnv("POSTGRES_DRIVER_OPTIONS", moduleName) ||
@@ -63,7 +78,7 @@ export function loadDatabaseConfig(
   }
 
   if (isModuleServiceInitializeOptions(options)) {
-    database.clientUrl = options.database!.clientUrl ?? database.clientUrl
+    database.clientUrl = getDatabaseUrl(options)
     database.schema = options.database!.schema ?? database.schema
     database.driverOptions =
       options.database!.driverOptions ??
@@ -74,7 +89,7 @@ export function loadDatabaseConfig(
   if (!database.clientUrl && !silent) {
     throw new MedusaError(
       MedusaError.Types.INVALID_ARGUMENT,
-      "No database clientUrl provided. Please provide the clientUrl through the PRODUCT_POSTGRES_URL or POSTGRES_URL environment variable or the options object in the initialize function."
+      "No database clientUrl provided. Please provide the clientUrl through the [MODULE]_POSTGRES_URL, MEDUSA_POSTGRES_URL or POSTGRES_URL environment variable or the options object in the initialize function."
     )
   }
 

packages/utils/src/modules-sdk/loaders/mikro-orm-connection-loader.ts

@@ -51,7 +51,6 @@ export async function mikroOrmConnectionLoader({
   const shouldSwallowError = !!(
     options as ModulesSdkTypes.ModuleServiceInitializeOptions
   )?.database?.connection
-
   dbConfig = {
     ...loadDatabaseConfig(
       "product",
@@ -97,7 +96,7 @@ async function loadShared({ container, entities }) {
   )
   if (!sharedConnection) {
     throw new Error(
-      "The module is setup to use a shared resources but no shared connection is present. A new connection will be created"
+      "The module is setup to use a shared resources but no shared connection is present."
     )
   }
 

packages/workflows/jest.config.js

@@ -1,12 +1,12 @@
 module.exports = {
-  globals: {
-    "ts-jest": {
-      tsConfig: "tsconfig.json",
-      isolatedModules: false,
-    },
-  },
   transform: {
-    "^.+\\.[jt]s?$": "ts-jest",
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsConfig: "tsconfig.json",
+        isolatedModules: true,
+      },
+    ],
   },
   testEnvironment: `node`,
   moduleFileExtensions: [`js`, `ts`],

packages/workflows/package.json

@@ -20,10 +20,10 @@
   "devDependencies": {
     "@medusajs/types": "^1.10.2",
     "cross-env": "^5.2.1",
-    "jest": "^25.5.4",
+    "jest": "^29.6.3",
     "rimraf": "^5.0.1",
-    "ts-jest": "^25.5.1",
-    "typescript": "^4.4.4"
+    "ts-jest": "^29.1.1",
+    "typescript": "^5.1.6"
   },
   "dependencies": {
     "@medusajs/modules-sdk": "^1.9.2",

yarn.lock

@@ -6196,10 +6196,10 @@ __metadata:
     "@medusajs/modules-sdk": ^1.8.8
     "@medusajs/types": ^1.8.8
     cross-env: ^5.2.1
-    jest: ^25.5.4
+    jest: ^29.6.3
     rimraf: ^5.0.1
-    ts-jest: ^25.5.1
-    typescript: ^4.4.4
+    ts-jest: ^29.1.1
+    typescript: ^5.1.6
   languageName: unknown
   linkType: soft
 
@@ -6212,10 +6212,10 @@ __metadata:
     awilix: ^8.0.0
     cross-env: ^5.2.1
     ioredis: ^5.3.1
-    jest: ^25.5.4
+    jest: ^29.6.3
     rimraf: ^5.0.1
-    ts-jest: ^25.5.1
-    typescript: ^4.4.4
+    ts-jest: ^29.1.1
+    typescript: ^5.1.6
   languageName: unknown
   linkType: soft
 
@@ -6241,10 +6241,10 @@ __metadata:
     "@medusajs/types": ^1.8.10
     "@medusajs/utils": ^1.9.2
     cross-env: ^5.2.1
-    jest: ^25.5.2
+    jest: ^29.6.3
     rimraf: ^5.0.1
-    ts-jest: ^25.5.1
-    typescript: ^4.4.4
+    ts-jest: ^29.1.1
+    typescript: ^5.1.6
     ulid: ^2.3.0
   languageName: unknown
   linkType: soft
@@ -6260,11 +6260,11 @@ __metadata:
     bullmq: ^3.5.6
     cross-env: ^5.2.1
     ioredis: ^5.2.5
-    jest: ^25.5.2
+    jest: ^29.6.3
     medusa-test-utils: ^1.1.40
     rimraf: ^5.0.1
-    ts-jest: ^25.5.1
-    typescript: ^4.4.4
+    ts-jest: ^29.1.1
+    typescript: ^5.1.6
   languageName: unknown
   linkType: soft
 
@@ -6310,11 +6310,32 @@ __metadata:
     "@medusajs/utils": ^1.9.1
     awilix: ^8.0.0
     cross-env: ^5.2.1
-    jest: ^25.5.4
+    jest: ^29.6.3
     rimraf: ^5.0.1
-    ts-jest: ^25.5.1
+    ts-jest: ^29.1.1
     typeorm: ^0.3.16
-    typescript: ^4.4.4
+    typescript: ^5.1.6
+  languageName: unknown
+  linkType: soft
+
+"@medusajs/link-modules@workspace:packages/link-modules":
+  version: 0.0.0-use.local
+  resolution: "@medusajs/link-modules@workspace:packages/link-modules"
+  dependencies:
+    "@medusajs/modules-sdk": ^1.8.8
+    "@medusajs/types": ^1.8.11
+    "@medusajs/utils": ^1.9.2
+    "@mikro-orm/core": 5.7.12
+    "@mikro-orm/postgresql": 5.7.12
+    awilix: ^8.0.0
+    cross-env: ^5.2.1
+    jest: ^29.6.3
+    pg-god: ^1.0.12
+    rimraf: ^5.0.1
+    ts-jest: ^29.1.1
+    ts-node: ^10.9.1
+    tsc-alias: ^1.8.6
+    typescript: ^5.1.6
   languageName: unknown
   linkType: soft
 
@@ -6496,11 +6517,11 @@ __metadata:
     "@medusajs/utils": ^1.9.6
     awilix: ^8.0.0
     cross-env: ^5.2.1
-    jest: ^25.5.4
+    jest: ^29.6.3
     resolve-cwd: ^3.0.0
     rimraf: ^5.0.1
-    ts-jest: ^25.5.1
-    typescript: ^4.4.4
+    ts-jest: ^29.1.1
+    typescript: ^5.1.6
   languageName: unknown
   linkType: soft
 
@@ -6558,10 +6579,10 @@ __metadata:
     "@medusajs/utils": ^1.9.6
     cross-env: ^5.2.1
     graphql: ^16.6.0
-    jest: ^25.5.4
+    jest: ^29.6.3
     rimraf: ^5.0.1
-    ts-jest: ^25.5.1
-    typescript: ^4.4.4
+    ts-jest: ^29.1.1
+    typescript: ^5.1.6
   languageName: unknown
   linkType: soft
 
@@ -6609,16 +6630,16 @@ __metadata:
     cross-env: ^5.2.1
     dotenv: ^16.1.4
     faker: ^6.6.6
-    jest: ^25.5.4
+    jest: ^29.6.3
     knex: 2.4.2
     lodash: ^4.17.21
     medusa-test-utils: ^1.1.40
     pg-god: ^1.0.12
     rimraf: ^3.0.2
-    ts-jest: ^25.5.1
+    ts-jest: ^29.1.1
     ts-node: ^10.9.1
     tsc-alias: ^1.8.6
-    typescript: ^4.4.4
+    typescript: ^5.1.6
   bin:
     medusa-product-migrations-down: dist/scripts/bin/run-migration-down.js
     medusa-product-migrations-up: dist/scripts/bin/run-migration-up.js
@@ -6635,11 +6656,11 @@ __metadata:
     "@medusajs/utils": ^1.9.1
     awilix: ^8.0.0
     cross-env: ^5.2.1
-    jest: ^25.5.4
+    jest: ^29.6.3
     rimraf: ^5.0.1
-    ts-jest: ^25.5.1
+    ts-jest: ^29.1.1
     typeorm: ^0.3.16
-    typescript: ^4.4.4
+    typescript: ^5.1.6
   languageName: unknown
   linkType: soft
 
@@ -6652,7 +6673,7 @@ __metadata:
     ioredis: ^5.2.5
     rimraf: ^5.0.1
     typeorm: ^0.3.16
-    typescript: ^4.4.4
+    typescript: ^5.1.6
     winston: ^3.8.2
   languageName: unknown
   linkType: soft
@@ -6763,10 +6784,10 @@ __metadata:
     awilix: ^8.0.1
     cross-env: ^5.2.1
     express: ^4.18.2
-    jest: ^25.5.4
+    jest: ^29.6.3
     rimraf: ^5.0.1
-    ts-jest: ^25.5.1
-    typescript: ^4.4.4
+    ts-jest: ^29.1.1
+    typescript: ^5.1.6
     ulid: ^2.3.0
   languageName: unknown
   linkType: soft
@@ -6781,10 +6802,10 @@ __metadata:
     "@medusajs/utils": ^1.9.6
     awilix: ^8.0.1
     cross-env: ^5.2.1
-    jest: ^25.5.4
+    jest: ^29.6.3
     rimraf: ^5.0.1
-    ts-jest: ^25.5.1
-    typescript: ^4.4.4
+    ts-jest: ^29.1.1
+    typescript: ^5.1.6
     ulid: ^2.3.0
   languageName: unknown
   linkType: soft
@@ -29262,7 +29283,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"jest@npm:25.5.4, jest@npm:^25.5.2, jest@npm:^25.5.4":
+"jest@npm:25.5.4, jest@npm:^25.5.4":
   version: 25.5.4
   resolution: "jest@npm:25.5.4"
   dependencies: