chore: add cart links to promotions/product (#7428)

packages/modules/link-modules/src/definitions/cart-promotion.ts

@@ -29,26 +29,21 @@ export const CartPromotion: ModuleJoinerConfig = {
       serviceName: Modules.PROMOTION,
       primaryKey: "id",
       foreignKey: "promotion_id",
-      alias: "promotion",
+      alias: "promotions",
     },
   ],
   extends: [
     {
       serviceName: Modules.CART,
+      fieldAlias: {
+        promotions: "cart_link.promotions",
+      },
       relationship: {
         serviceName: LINKS.CartPromotion,
         primaryKey: "cart_id",
         foreignKey: "id",
         alias: "cart_link",
-      },
-    },
-    {
-      serviceName: Modules.PROMOTION,
-      relationship: {
-        serviceName: LINKS.CartPromotion,
-        primaryKey: "promotion_id",
-        foreignKey: "id",
-        alias: "promotion_link",
+        isList: true,
       },
     },
   ],

packages/modules/link-modules/src/definitions/readonly/index.ts

@@ -3,6 +3,7 @@ export * from "./cart-product"
 export * from "./cart-region"
 export * from "./cart-sales-channel"
 export * from "./inventory-level-stock-location"
+export * from "./line-item-adjustment-promotion"
 export * from "./order-customer"
 export * from "./order-product"
 export * from "./order-sales-channel"

packages/modules/link-modules/src/definitions/readonly/line-item-adjustment-promotion.ts

@@ -0,0 +1,18 @@
+import { Modules } from "@medusajs/modules-sdk"
+import { ModuleJoinerConfig } from "@medusajs/types"
+
+export const LineItemAdjustmentPromotion: ModuleJoinerConfig = {
+  isLink: true,
+  isReadOnlyLink: true,
+  extends: [
+    {
+      serviceName: Modules.CART,
+      relationship: {
+        serviceName: Modules.PROMOTION,
+        primaryKey: "id",
+        foreignKey: "promotion_id",
+        alias: "promotion",
+      },
+    },
+  ],
+}