added expect-relations helper and used it to test get-cart

integration-tests/api/__tests__/store/cart.js

@@ -5,8 +5,10 @@ const { Region } = require("@medusajs/medusa");
 const setupServer = require("../../../helpers/setup-server");
 const { useApi } = require("../../../helpers/use-api");
 const { initDb } = require("../../../helpers/use-db");
+const { expectRelations } = require("../../helpers/expect-relations");
 
 const cartSeeder = require("../../helpers/cart-seeder");
+const productSeeder = require("../../helpers/product-seeder");
 
 jest.setTimeout(30000);
 
@@ -330,4 +332,56 @@ describe("/store/carts", () => {
       expect(response.status).toEqual(200);
     });
   });
+
+  describe("get-cart returns expected relations", () => {
+    beforeEach(async () => {
+      try {
+        await productSeeder(dbConnection);
+        await cartSeeder(dbConnection);
+      } catch (err) {
+        console.log(err);
+        throw err;
+      }
+    });
+
+    afterEach(async () => {
+      const manager = dbConnection.manager;
+      await doAfterEach(manager);
+    });
+
+  
+    it("returns default relations", async () => {
+      const api = useApi();
+
+      const expectedRelations = [
+        "gift_cards",
+        "region",
+        "items.variant.prices",
+        "payment",
+        "shipping_address",
+        "billing_address",
+        "region.countries",
+        "region.payment_providers",
+        "payment_sessions",
+        "shipping_methods.shipping_option",
+        "discounts",
+      ]
+
+      await api.post("/store/carts/test-cart/line-items", {
+        quantity: 1,
+        variant_id: "test-variant",
+      })
+
+      // await api.post("/store/carts/test-cart/shipping-methods", {
+      //   option_id: "test-option"
+      // })
+
+
+      const response = await api.get("/store/carts/test-cart")
+
+      console.log(response.data.cart)
+      expectRelations(expectedRelations, response.data.cart)
+
+    });
+  });
 });

integration-tests/api/helpers/expect-relations.js

@@ -0,0 +1,20 @@
+const { expect } = require("@jest/globals")
+
+export function expectRelations(expected, actual){
+    expected.forEach(a => expectRelations_(a, actual))
+}
+
+function expectRelations_(expected, actual){
+    const items = expected.split(".");
+    let data_ = actual;
+
+    for(const i in items){
+        data_ = data_[items[i]];
+        
+        if(data_ instanceof Array && data_.length > 0) {
+            data_ = data_[0];
+        } 
+    
+        expect(data_).toBeDefined();
+    }
+}

integration-tests/api/helpers/product-seeder.js

@@ -6,6 +6,7 @@ const {
   Product,
   ShippingProfile,
   ProductVariant,
+  MoneyAmount,
   Image,
 } = require("@medusajs/medusa");
 
@@ -74,7 +75,14 @@ module.exports = async (connection, data = {}) => {
     inventory_quantity: 10,
     title: "Test variant",
     product_id: "test-product",
-    prices: [{ id: "test-price", currency_code: "usd", amount: 100 }],
+    prices: [],
     options: [{ id: "test-variant-option", value: "Default variant" }],
   });
+
+  await manager.insert(MoneyAmount, {
+    variant_id: "test-variant",
+    id: "test-price",
+    currency_code: "usd",
+    amount: 100,
+  });
 };

integration-tests/helpers/use-db.js

@@ -36,8 +36,10 @@ module.exports = {
     );
 
     const databaseName = "medusa-integration";
-    await createDatabase({ databaseName });
 
+    await createDatabase({ databaseName });
+    
+ 
     const connection = await createConnection({
       type: "postgres",
       url: "postgres://localhost/medusa-integration",
@@ -66,6 +68,7 @@ module.exports = {
 
     instance.setDb(dbConnection);
     return dbConnection;
+    
   },
   useDb: function () {
     return instance;

packages/medusa/src/api/routes/admin/draft-orders/index.js

@@ -49,6 +49,8 @@ export const defaultRelations = ["order", "cart"]
 export const defaultCartRelations = [
   "region",
   "items",
+  "items.variant",
+  "items.variant.prices",
   "payment",
   "shipping_address",
   "billing_address",

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

@@ -101,13 +101,15 @@ export const defaultRelations = [
   "gift_cards",
   "region",
   "items",
+  "items.variant",
+  "items.variant.prices",
   "payment",
   "shipping_address",
   "billing_address",
   "region.countries",
   "region.payment_providers",
-  "shipping_methods",
   "payment_sessions",
+  "shipping_methods",
   "shipping_methods.shipping_option",
   "discounts",
 ]

packages/medusa/src/api/routes/store/orders/index.js

@@ -33,6 +33,7 @@ export const defaultRelations = [
   "items",
   "items.variant",
   "items.variant.product",
+  "items.variant.prices",
   "shipping_methods",
   "discounts",
   "customer",

packages/medusa/src/models/line-item.ts

@@ -99,7 +99,7 @@ export class LineItem {
   @Column({ nullable: true })
   variant_id: string
 
-  @ManyToOne(() => ProductVariant, { eager: true })
+  @ManyToOne(() => ProductVariant)
   @JoinColumn({ name: "variant_id" })
   variant: ProductVariant
 

packages/medusa/src/models/product-variant.ts

@@ -19,6 +19,9 @@ import { Product } from "./product"
 import { MoneyAmount } from "./money-amount"
 import { ProductOptionValue } from "./product-option-value"
 
+
+
+
 @Entity()
 export class ProductVariant {
   @PrimaryColumn()