hotfix(medusa-plugin-add-on): Adds cart decorator to add-on plugin

packages/medusa-plugin-add-ons/.gitignore

@@ -11,4 +11,5 @@ node_modules
 /services
 /models
 /subscribers
+/loaders
 

packages/medusa-plugin-add-ons/src/api/routes/store/create-line-item.js

@@ -32,16 +32,6 @@ export default async (req, res) => {
     cart = await cartService.addLineItem(cart._id, lineItem)
     cart = await cartService.decorate(cart, [], ["region"])
 
-    cart.items = await Promise.all(
-      cart.items.map((item) =>
-        lineItemService.decorate(
-          item,
-          ["title", "quantity", "thumbnail", "content", "should_merge"],
-          ["add_ons"]
-        )
-      )
-    )
-
     res.status(200).json({ cart })
   } catch (err) {
     throw err

packages/medusa-plugin-add-ons/src/api/routes/store/update-line-item.js

@@ -45,16 +45,6 @@ export default async (req, res) => {
 
     cart = await cartService.decorate(cart, [], ["region"])
 
-    cart.items = await Promise.all(
-      cart.items.map((item) =>
-        lineItemService.decorate(
-          item,
-          ["title", "quantity", "thumbnail", "content", "should_merge"],
-          ["add_ons"]
-        )
-      )
-    )
-
     res.status(200).json({ cart })
   } catch (err) {
     throw err

packages/medusa-plugin-add-ons/src/loaders/decorator.js

@@ -0,0 +1,26 @@
+export default (container, config) => {
+  const cartService = container.resolve("cartService")
+  const addOnLineItemService = container.resolve("addOnLineItemService")
+
+  cartService.addDecorator(async (cart) => {
+    try {
+      cart.items = await Promise.all(
+        cart.items.map((item) => {
+          if (item.metadata && item.metadata.add_ons) {
+            return addOnLineItemService.decorate(
+              item,
+              ["title", "quantity", "thumbnail", "content", "should_merge"],
+              ["add_ons"]
+            )
+          } else {
+            return item
+          }
+        })
+      )
+
+      return cart
+    } catch (error) {
+      return cart
+    }
+  })
+}