fix(medusa): Allow deleting metadata fields (#3055)

integration-tests/api/factories/simple-product-factory.ts

@@ -5,17 +5,17 @@ import {
   ProductType,
   ShippingProfile,
   ShippingProfileType,
-  Store
+  Store,
 } from "@medusajs/medusa"
 import faker from "faker"
 import { Connection } from "typeorm"
 import {
   ProductVariantFactoryData,
-  simpleProductVariantFactory
+  simpleProductVariantFactory,
 } from "./simple-product-variant-factory"
 import {
   SalesChannelFactoryData,
-  simpleSalesChannelFactory
+  simpleSalesChannelFactory,
 } from "./simple-sales-channel-factory"
 
 export type ProductFactoryData = {
@@ -28,6 +28,7 @@ export type ProductFactoryData = {
   options?: { id: string; title: string }[]
   variants?: ProductVariantFactoryData[]
   sales_channels?: SalesChannelFactoryData[]
+  metadata?: Record<string, unknown>
 }
 
 export const simpleProductFactory = async (
@@ -83,6 +84,7 @@ export const simpleProductFactory = async (
     discountable: !data.is_giftcard,
     tags: [] as ProductTag[],
     profile_id: data.is_giftcard ? gcProfile?.id : defaultProfile?.id,
+    metadata: data.metadata || null,
   } as Product
 
   if (typeof data.tags !== "undefined") {