AC-14888: Error getting order item discounts applied_to for customer order via GraphQl customer request

Author: wip44850

app/code/Magento/SalesGraphQl/Model/OrderItem/DataProvider.php

@@ -15,14 +15,15 @@
 use Magento\Sales\Api\Data\OrderItemInterface;
 use Magento\Sales\Api\OrderItemRepositoryInterface;
 use Magento\Sales\Api\OrderRepositoryInterface;
-use Magento\SalesRule\Api\Data\DiscountAppliedToInterface as DiscountAppliedTo;
 use Magento\Tax\Helper\Data as TaxHelper;
 
 /**
  * Data provider for order items
  */
 class DataProvider
 {
+    public const APPLIED_TO_ITEM = 'ITEM';
+    public const APPLIED_TO_SHIPPING = 'SHIPPING';
     /**
      * @var OrderItemRepositoryInterface
      */
@@ -260,8 +261,8 @@ private function getDiscountDetails(OrderInterface $associatedOrder, OrderItemIn
     private function getAppliedTo($order)
     {
         if ((float) $order->getShippingDiscountAmount() > 0) {
-            return DiscountAppliedTo::APPLIED_TO_SHIPPING;
+            return self::APPLIED_TO_SHIPPING;
         }
-        return DiscountAppliedTo::APPLIED_TO_ITEM;
+        return self::APPLIED_TO_ITEM;
     }
 }