fix(medusa): order retrieval missing relations + allow for expand (#2267)

**What**

Fix missing relation on the order retrieval endpoint as well as allow the expand fields

FIXES CORE-578

packages/medusa/src/api/routes/admin/orders/__tests__/get-order.js

@@ -1,77 +1,7 @@
 import { IdMap } from "medusa-test-utils"
 import { request } from "../../../../../helpers/test-request"
 import { OrderServiceMock } from "../../../../../services/__mocks__/order"
-
-const defaultRelations = [
-  "customer",
-  "billing_address",
-  "shipping_address",
-  "discounts",
-  "discounts.rule",
-  "shipping_methods",
-  "payments",
-  "fulfillments",
-  "fulfillments.tracking_links",
-  "fulfillments.items",
-  "returns",
-  "returns.shipping_method",
-  "returns.shipping_method.tax_lines",
-  "returns.items",
-  "returns.items.reason",
-  "gift_cards",
-  "gift_card_transactions",
-  "claims",
-  "claims.return_order",
-  "claims.return_order.shipping_method",
-  "claims.shipping_methods",
-  "claims.shipping_address",
-  "claims.additional_items",
-  "claims.fulfillments",
-  "claims.fulfillments.tracking_links",
-  "claims.claim_items",
-  "claims.claim_items.item",
-  "claims.claim_items.images",
-  "swaps",
-  "swaps.return_order",
-  "swaps.payment",
-  "swaps.shipping_methods",
-  "swaps.shipping_address",
-  "swaps.additional_items",
-  "swaps.fulfillments",
-  "swaps.fulfillments.tracking_links",
-]
-
-const defaultFields = [
-  "id",
-  "status",
-  "fulfillment_status",
-  "payment_status",
-  "display_id",
-  "cart_id",
-  "draft_order_id",
-  "customer_id",
-  "email",
-  "region_id",
-  "currency_code",
-  "tax_rate",
-  "canceled_at",
-  "created_at",
-  "updated_at",
-  "metadata",
-  "items.refundable",
-  "swaps.additional_items.refundable",
-  "claims.additional_items.refundable",
-  "shipping_total",
-  "discount_total",
-  "tax_total",
-  "refunded_total",
-  "gift_card_total",
-  "subtotal",
-  "total",
-  "paid_total",
-  "refundable_amount",
-  "no_notification",
-]
+import { defaultAdminOrdersFields, defaultAdminOrdersRelations } from "../index"
 
 describe("GET /admin/orders", () => {
   describe("successfully gets an order", () => {
@@ -100,8 +30,8 @@ describe("GET /admin/orders", () => {
       expect(OrderServiceMock.retrieve).toHaveBeenCalledWith(
         IdMap.getId("test-order"),
         {
-          select: defaultFields,
-          relations: defaultRelations,
+          select: defaultAdminOrdersFields,
+          relations: defaultAdminOrdersRelations,
         }
       )
     })

packages/medusa/src/api/routes/admin/orders/index.ts

@@ -3,7 +3,7 @@ import "reflect-metadata"
 import { Order } from "../../../.."
 import {
   DeleteResponse,
-  EmptyQueryParams,
+  FindParams,
   PaginatedResponse,
 } from "../../../../types/common"
 import middlewares, { transformQuery } from "../../../middlewares"
@@ -45,7 +45,7 @@ export default (app, featureFlagRouter: FlagRouter) => {
    */
   route.get(
     "/:id",
-    transformQuery(EmptyQueryParams, {
+    transformQuery(FindParams, {
       defaultRelations: relations,
       defaultFields: defaultAdminOrdersFields,
       allowedFields: allowedAdminOrdersFields,
@@ -260,6 +260,7 @@ export const defaultAdminOrdersRelations = [
   "claims",
   "claims.return_order",
   "claims.return_order.shipping_method",
+  "claims.return_order.shipping_method.tax_lines",
   "claims.shipping_methods",
   "claims.shipping_address",
   "claims.additional_items",
@@ -271,8 +272,11 @@ export const defaultAdminOrdersRelations = [
   // "claims.claim_items.tags",
   "swaps",
   "swaps.return_order",
+  "swaps.return_order.shipping_method",
+  "swaps.return_order.shipping_method.tax_lines",
   "swaps.payment",
   "swaps.shipping_methods",
+  "swaps.shipping_methods.tax_lines",
   "swaps.shipping_address",
   "swaps.additional_items",
   "swaps.fulfillments",

packages/medusa/src/api/routes/admin/products/index.ts

@@ -1,7 +1,7 @@
 import { Router } from "express"
 import "reflect-metadata"
 import { Product, ProductTag, ProductType } from "../../../.."
-import { EmptyQueryParams, PaginatedResponse } from "../../../../types/common"
+import { FindParams, PaginatedResponse } from "../../../../types/common"
 import { PricedProduct } from "../../../../types/pricing"
 import { FlagRouter } from "../../../../utils/flag-router"
 import middlewares, { transformQuery } from "../../../middlewares"
@@ -70,7 +70,7 @@ export default (app, featureFlagRouter: FlagRouter) => {
   )
   route.get(
     "/:id",
-    transformQuery(EmptyQueryParams, {
+    transformQuery(FindParams, {
       defaultRelations: defaultAdminProductRelations,
       defaultFields: defaultAdminProductFields,
       allowedFields: allowedAdminProductFields,

packages/medusa/src/api/routes/store/carts/index.ts

@@ -1,13 +1,14 @@
 import { Router } from "express"
 import "reflect-metadata"
 import { Cart, Order, Swap } from "../../../../"
-import { DeleteResponse, EmptyQueryParams } from "../../../../types/common"
+import { DeleteResponse, FindParams } from "../../../../types/common"
 import middlewares, {
   transformBody,
   transformQuery,
 } from "../../../middlewares"
 import { StorePostCartsCartReq } from "./update-cart"
 import { StorePostCartReq } from "./create-cart"
+
 const route = Router()
 
 export default (app, container) => {
@@ -28,7 +29,7 @@ export default (app, container) => {
 
   route.get(
     "/:id",
-    transformQuery(EmptyQueryParams, {
+    transformQuery(FindParams, {
       defaultRelations: defaultStoreCartRelations,
       defaultFields: defaultStoreCartFields,
       isList: false,