Feat/expand on list discounts (#1304)

integration-tests/api/__tests__/admin/discount.js

@@ -142,6 +142,58 @@ describe("/admin/discounts", () => {
       )
     })
 
+    it("should retrieve discount and only select the id field and retrieve the relation parent_discount", async () => {
+      const api = useApi()
+
+      const group = await dbConnection.manager.insert(CustomerGroup, {
+        id: "customer-group-1",
+        name: "vip-customers",
+      })
+
+      await dbConnection.manager.insert(Customer, {
+        id: "cus_1234",
+        email: "oli@email.com",
+        groups: [group],
+      })
+
+      await simpleDiscountFactory(dbConnection, {
+        id: "test-discount",
+        code: "TEST",
+        rule: {
+          type: "percentage",
+          value: "10",
+          allocation: "total",
+          conditions: [
+            {
+              type: "customer_groups",
+              operator: "in",
+              customer_groups: ["customer-group-1"],
+            },
+          ],
+        },
+      })
+
+      const response = await api
+        .get(
+          "/admin/discounts/test-discount?fields=id&expand=parent_discount",
+          {
+            headers: {
+              Authorization: "Bearer test_token",
+            },
+          }
+        )
+        .catch((err) => {
+          console.log(err)
+        })
+
+      const disc = response.data.discount
+      expect(response.status).toEqual(200)
+      expect(disc).toEqual({
+        id: "test-discount",
+        parent_discount: null,
+      })
+    })
+
     it("should retrieve discount with product conditions created with factory", async () => {
       const api = useApi()
 

packages/medusa-js/src/resources/admin/discounts.ts

@@ -2,6 +2,7 @@ import {
   AdminDiscountsDeleteRes,
   AdminDiscountsListRes,
   AdminDiscountsRes,
+  AdminGetDiscountParams,
   AdminGetDiscountsParams,
   AdminPostDiscountsDiscountDynamicCodesReq,
   AdminPostDiscountsDiscountReq,

packages/medusa-react/src/hooks/admin/discounts/queries.ts

@@ -1,6 +1,7 @@
 import {
   AdminDiscountsListRes,
   AdminDiscountsRes,
+  AdminGetDiscountParams,
   AdminGetDiscountsParams,
 } from "@medusajs/medusa"
 import { Response } from "@medusajs/medusa-js"
@@ -34,6 +35,7 @@ export const useAdminDiscounts = (
 
 export const useAdminDiscount = (
   id: string,
+  query?: AdminGetDiscountParams,
   options?: UseQueryOptionsWrapper<
     Response<AdminDiscountsRes>,
     Error,
@@ -43,7 +45,7 @@ export const useAdminDiscount = (
   const { client } = useMedusa()
   const { data, ...rest } = useQuery(
     adminDiscountKeys.detail(id),
-    () => client.admin.discounts.retrieve(id),
+    () => client.admin.discounts.retrieve(id, query),
     options
   )
   return { ...data, ...rest } as const

packages/medusa/src/api/routes/admin/discounts/get-discount.ts

@@ -1,5 +1,9 @@
+import { IsOptional, IsString } from "class-validator"
 import { defaultAdminDiscountsFields, defaultAdminDiscountsRelations } from "."
+import { Discount } from "../../../.."
 import DiscountService from "../../../../services/discount"
+import { getRetrieveConfig } from "../../../../utils/get-query-config"
+import { validator } from "../../../../utils/validator"
 /**
  * @oas [get] /discounts/{id}
  * operationId: "GetDiscountsDiscount"
@@ -8,6 +12,9 @@ import DiscountService from "../../../../services/discount"
  * x-authenticated: true
  * parameters:
  *   - (path) id=* {string} The id of the Discount
+ * query:
+ *  - (query) expand {string} Comma separated list of relations to include in the results.
+ *  - (query) fields {string} Comma separated list of fields to include in the results.
  * tags:
  *   - Discount
  * responses:
@@ -23,11 +30,27 @@ import DiscountService from "../../../../services/discount"
 export default async (req, res) => {
   const { discount_id } = req.params
 
+  const validated = await validator(AdminGetDiscountParams, req.query)
+
+  const config = getRetrieveConfig<Discount>(
+    defaultAdminDiscountsFields,
+    defaultAdminDiscountsRelations,
+    validated?.fields?.split(",") as (keyof Discount)[],
+    validated?.expand?.split(",")
+  )
+
   const discountService: DiscountService = req.scope.resolve("discountService")
-  const data = await discountService.retrieve(discount_id, {
-    select: defaultAdminDiscountsFields,
-    relations: defaultAdminDiscountsRelations,
-  })
+  const data = await discountService.retrieve(discount_id, config)
 
   res.status(200).json({ discount: data })
 }
+
+export class AdminGetDiscountParams {
+  @IsOptional()
+  @IsString()
+  expand?: string
+
+  @IsOptional()
+  @IsString()
+  fields?: string
+}

packages/medusa/src/api/routes/admin/discounts/list-discounts.ts

@@ -43,9 +43,12 @@ export default async (req, res) => {
 
   const discountService: DiscountService = req.scope.resolve("discountService")
 
+  const relations =
+    validated.expand?.split(",") ?? defaultAdminDiscountsRelations
+
   const listConfig: FindConfig<Discount> = {
     select: defaultAdminDiscountsFields,
-    relations: defaultAdminDiscountsRelations,
+    relations,
     skip: validated.offset,
     take: validated.limit,
     order: { created_at: "DESC" },