feat(region): Add admin region get + list endpoints (#6322)

**What**
Add `GET /admin/regions`
Add `GET /admin/regions/:id`

Blocked by #6320 

Co-authored-by: Adrien de Peretti <25098370+adrien2p@users.noreply.github.com>

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

@@ -4,3 +4,5 @@ if (typeof process.env.DB_TEMP_NAME === "undefined") {
 }
 
 process.env.MEDUSA_REGION_DB_SCHEMA = "public"
+// TODO: Remove this when all modules are migrated to v2
+process.env.MEDUSA_FF_MEDUSA_V2 = true

packages/region/src/index.ts

@@ -1,28 +1,10 @@
-import { Modules } from "@medusajs/modules-sdk"
-import { ModulesSdkUtils } from "@medusajs/utils"
-
-import * as RegionModels from "@models"
-
-import { moduleDefinition } from "./module-definition"
+import {
+  moduleDefinition,
+  revertMigration,
+  runMigrations,
+} from "./module-definition"
 
 export default moduleDefinition
-
-const migrationScriptOptions = {
-  moduleName: Modules.REGION,
-  models: RegionModels,
-  pathToMigrations: __dirname + "/migrations",
-}
-
-export const runMigrations = ModulesSdkUtils.buildMigrationScript(
-  migrationScriptOptions
-)
-export const revertMigration = ModulesSdkUtils.buildRevertMigrationScript(
-  migrationScriptOptions
-)
+export { revertMigration, runMigrations }
 
 export * from "./initialize"
-export * from "./loaders"
-export * from "./models"
-export * from "./services"
-export * from "./types"
-

packages/region/src/loaders/defaults.ts

@@ -2,6 +2,12 @@ import { ModuleRegistrationName } from "@medusajs/modules-sdk"
 import { IRegionModuleService, LoaderOptions } from "@medusajs/types"
 
 export default async ({ container }: LoaderOptions): Promise<void> => {
-  const service: IRegionModuleService = container.resolve(ModuleRegistrationName.REGION)
-  await service.createDefaultCountriesAndCurrencies()
+  const service: IRegionModuleService = container.resolve(
+    ModuleRegistrationName.REGION
+  )
+
+  // TODO: Remove when legacy modules have been migrated
+  if (!!process.env.MEDUSA_FF_MEDUSA_V2) {
+    await service.createDefaultCountriesAndCurrencies()
+  }
 }

packages/region/src/migrations/RegionModuleSetup20240205173216.ts

@@ -1,3 +1,4 @@
+import { generatePostgresAlterColummnIfExistStatement } from "@medusajs/utils"
 import { Migration } from "@mikro-orm/migrations"
 
 export class RegionModuleSetup20240205173216 extends Migration {
@@ -27,6 +28,13 @@ CREATE TABLE IF NOT EXISTS "region_currency" (
 -- Adjust "region" table
 ALTER TABLE "region" DROP CONSTRAINT IF EXISTS "FK_3bdd5896ec93be2f1c62a3309a5";
 ALTER TABLE "region" DROP CONSTRAINT IF EXISTS "FK_91f88052197680f9790272aaf5b";
+
+${generatePostgresAlterColummnIfExistStatement(
+  "region",
+  ["tax_rate", "gift_cards_taxable", "automatic_taxes", "includes_tax"],
+  "DROP NOT NULL"
+)}
+
 ALTER TABLE "region" ADD CONSTRAINT "region_currency_code_foreign" FOREIGN KEY ("currency_code") REFERENCES "region_currency" ("code") ON UPDATE CASCADE;
     
 CREATE INDEX IF NOT EXISTS "IDX_region_currency_code" ON "region" ("currency_code");

packages/region/src/module-definition.ts

@@ -1,14 +1,32 @@
 import { ModuleExports } from "@medusajs/types"
 import { RegionModuleService } from "@services"
 
+import { Modules } from "@medusajs/modules-sdk"
+import { ModulesSdkUtils } from "@medusajs/utils"
+import * as RegionModels from "@models"
 import loadConnection from "./loaders/connection"
 import loadContainer from "./loaders/container"
 import loadDefaults from "./loaders/defaults"
 
+const migrationScriptOptions = {
+  moduleName: Modules.REGION,
+  models: RegionModels,
+  pathToMigrations: __dirname + "/migrations",
+}
+
+export const runMigrations = ModulesSdkUtils.buildMigrationScript(
+  migrationScriptOptions
+)
+export const revertMigration = ModulesSdkUtils.buildRevertMigrationScript(
+  migrationScriptOptions
+)
+
 const service = RegionModuleService
 const loaders = [loadContainer, loadConnection, loadDefaults] as any
 
 export const moduleDefinition: ModuleExports = {
   service,
   loaders,
+  runMigrations,
+  revertMigration,
 }

packages/region/src/services/region-module.ts

@@ -172,7 +172,7 @@ export default class RegionModuleService<
   ): Promise<void> {
     const [countries, count] = await this.countryService_.listAndCount(
       {},
-      { select: ["id", "iso_2"], take: COUNTRIES_LIMIT },
+      { select: ["iso_2"], take: COUNTRIES_LIMIT },
       sharedContext
     )