Feat/expand on list discounts (#1304)

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" },