MC-35026: When a Downloadable Product in a Group Product The Order does not show links

Author: tsviklinskyi

app/code/Magento/Downloadable/Observer/SaveDownloadableOrderItemObserver.php

@@ -3,6 +3,8 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Downloadable\Observer;
 
 use Magento\Framework\Event\ObserverInterface;
@@ -81,12 +83,14 @@ public function __construct(
      */
     public function execute(\Magento\Framework\Event\Observer $observer)
     {
+        /** @var \Magento\Sales\Model\Order\Item $orderItem */
         $orderItem = $observer->getEvent()->getItem();
         if (!$orderItem->getId()) {
             //order not saved in the database
             return $this;
         }
-        if ($orderItem->getProductType() != \Magento\Downloadable\Model\Product\Type::TYPE_DOWNLOADABLE) {
+        $productType = $orderItem->getRealProductType() ?: $orderItem->getProductType();
+        if ($productType != \Magento\Downloadable\Model\Product\Type::TYPE_DOWNLOADABLE) {
             return $this;
         }
         $product = $orderItem->getProduct();
@@ -112,13 +116,13 @@ public function execute(\Magento\Framework\Event\Observer $observer)
             if ($linkIds = $orderItem->getProductOptionByCode('links')) {
                 $linkPurchased = $this->_createPurchasedModel();
                 $this->_objectCopyService->copyFieldsetToTarget(
-                    \downloadable_sales_copy_order::class,
+                    'downloadable_sales_copy_order',
                     'to_downloadable',
                     $orderItem->getOrder(),
                     $linkPurchased
                 );
                 $this->_objectCopyService->copyFieldsetToTarget(
-                    \downloadable_sales_copy_order_item::class,
+                    'downloadable_sales_copy_order_item',
                     'to_downloadable',
                     $orderItem,
                     $linkPurchased
@@ -131,14 +135,12 @@ public function execute(\Magento\Framework\Event\Observer $observer)
                         ScopeInterface::SCOPE_STORE
                     );
                 $linkPurchased->setLinkSectionTitle($linkSectionTitle)->save();
-                
                 $linkStatus = \Magento\Downloadable\Model\Link\Purchased\Item::LINK_STATUS_PENDING;
                 if ($orderStatusToEnableItem == \Magento\Sales\Model\Order\Item::STATUS_PENDING
                     || $orderItem->getOrder()->getState() == \Magento\Sales\Model\Order::STATE_COMPLETE
                 ) {
                     $linkStatus = \Magento\Downloadable\Model\Link\Purchased\Item::LINK_STATUS_AVAILABLE;
                 }
-                
                 foreach ($linkIds as $linkId) {
                     if (isset($links[$linkId])) {
                         $linkPurchasedItem = $this->_createPurchasedItemModel()->setPurchasedId(
@@ -148,7 +150,7 @@ public function execute(\Magento\Framework\Event\Observer $observer)
                         );
 
                         $this->_objectCopyService->copyFieldsetToTarget(
-                            \downloadable_sales_copy_link::class,
+                            'downloadable_sales_copy_link',
                             'to_purchased',
                             $links[$linkId],
                             $linkPurchasedItem

app/code/Magento/Downloadable/Test/Unit/Observer/SaveDownloadableOrderItemObserverTest.php

@@ -176,6 +176,9 @@ public function testSaveDownloadableOrderItem()
         $itemMock->expects($this->any())
             ->method('getProductType')
             ->willReturn(DownloadableProductType::TYPE_DOWNLOADABLE);
+        $itemMock->expects($this->any())
+            ->method('getRealProductType')
+            ->willReturn(DownloadableProductType::TYPE_DOWNLOADABLE);
 
         $this->orderMock->expects($this->once())
             ->method('getStoreId')
@@ -311,6 +314,9 @@ public function testSaveDownloadableOrderItemSavedPurchasedLink()
         $itemMock->expects($this->any())
             ->method('getProductType')
             ->willReturn(DownloadableProductType::TYPE_DOWNLOADABLE);
+        $itemMock->expects($this->any())
+            ->method('getRealProductType')
+            ->willReturn(DownloadableProductType::TYPE_DOWNLOADABLE);
 
         $purchasedLink = $this->getMockBuilder(Purchased::class)
             ->disableOriginalConstructor()