fix: add on products on cart

Signed-off-by: Chloe <pinkcloudvnn@gmail.com>

lib/shopify/fragments/cart.ts

@@ -1,9 +1,13 @@
-import productFragment from './product';
+import imageFragment from './image';
 
 const cartFragment = /* GraphQL */ `
   fragment cart on Cart {
     id
     checkoutUrl
+    attributes {
+      key
+      value
+    }
     cost {
       subtotalAmount {
         amount
@@ -38,11 +42,22 @@ const cartFragment = /* GraphQL */ `
                 value
               }
               product {
-                ...product
+                featuredImage {
+                  ...image
+                }
+                handle
+                title
+                productType
               }
               coreVariantId: metafield(key: "coreVariant", namespace: "custom") {
                 value
               }
+              addOnQuantity: metafield(namespace: "custom", key: "add_on_quantity") {
+                value
+              }
+              addOnProductId: metafield(namespace: "custom", key: "add_on") {
+                value
+              }
             }
           }
         }
@@ -50,7 +65,7 @@ const cartFragment = /* GraphQL */ `
     }
     totalQuantity
   }
-  ${productFragment}
+  ${imageFragment}
 `;
 
 export default cartFragment;

lib/shopify/fragments/product.ts

@@ -64,6 +64,12 @@ const productFragment = /* GraphQL */ `
           condition: metafield(namespace: "custom", key: "condition") {
             value
           }
+          addOnQuantity: metafield(namespace: "custom", key: "add_on_quantity") {
+            value
+          }
+          addOnProductId: metafield(namespace: "custom", key: "add_on") {
+            value
+          }
         }
       }
     }