ACP2E-1975: GraphQL cannot add product with customizable option to cart

Author: AnujNehra

app/code/Magento/Quote/Model/Cart/AddProductsToCart.php

@@ -7,6 +7,7 @@
 
 namespace Magento\Quote\Model\Cart;
 
+use Magento\Catalog\Api\Data\ProductInterface;
 use Magento\Framework\Exception\NoSuchEntityException;
 use Magento\Quote\Api\CartRepositoryInterface;
 use Magento\Quote\Model\Cart\BuyRequest\BuyRequestBuilder;
@@ -165,7 +166,7 @@ private function addItemToCart(Quote $cart, Data\CartItem $cartItem, int $cartIt
                 $cartItemPosition
             );
         } else {
-            $product = $this->productReader->getProductBySku($sku);
+            $product = $this->getProductOptions($this->productReader->getProductBySku($sku));
             if (!$product || !$product->isSaleable() || !$product->isAvailable()) {
                 $errors[] = $this->error->create(
                     __('Could not find a product with SKU "%sku"', ['sku' => $sku])->render(),
@@ -206,4 +207,16 @@ private function prepareErrorOutput(Quote $cart, array $errors = []): AddProduct
 
         return $output;
     }
+
+    /**
+     * Set options from product options collection
+     *
+     * @param ProductInterface $productItem
+     * @return ProductInterface|null
+     */
+    private function getProductOptions(ProductInterface $productItem): ?ProductInterface
+    {
+        $productItem->setOptions($productItem->getProductOptionsCollection()->getItems());
+        return $productItem;
+    }
 }

app/code/Magento/Quote/Model/Cart/ProductReader.php

@@ -64,7 +64,6 @@ public function loadProducts(array $skus, int $storeId): void
         $this->productCollection->joinAttribute('visibility', 'catalog_product/visibility', 'entity_id', null, 'inner');
         $this->productCollection->load();
         foreach ($this->productCollection->getItems() as $productItem) {
-            $productItem->setOptions($productItem->getProductOptionsCollection()->getItems());
             $this->productsBySku[$productItem->getData(ProductInterface::SKU)] = $productItem;
         }
     }