MAGETWO-71613: [AP: New Order] Tier-prices are not applied on add complex product by SKU

Author: Sergii Kovalenko

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

@@ -1620,6 +1620,9 @@ public function addProduct(
             $item = $this->getItemByProduct($candidate);
             if (!$item) {
                 $item = $this->itemProcessor->init($candidate, $request);
+                $item->setQuote($this);
+                $item->setOptions($candidate->getCustomOptions());
+                $item->setProduct($candidate);
                 // Add only item that is not in quote already
                 $this->addItem($item);
             }

app/code/Magento/Quote/Model/Quote/Item/Processor.php

@@ -71,9 +71,6 @@ public function init(Product $product, $request)
             return $item;
         }
 
-        $item->setOptions($product->getCustomOptions());
-        $item->setProduct($product);
-
         if ($request->getResetCount() && !$product->getStickWithinParent() && $item->getId() === $request->getId()) {
             $item->setData(CartItemInterface::KEY_QTY, 0);
         }

app/code/Magento/Sales/Controller/Adminhtml/Order/Create.php

@@ -151,15 +151,15 @@ protected function _processActionData($action = null)
             'session' => $this->_getSession(),
         ];
 
-        $this->_eventManager->dispatch('adminhtml_sales_order_create_process_data_before', $eventData);
-
         /**
-         * Saving order data
+         * Import post data, in order to make order quote valid
          */
         if ($data = $this->getRequest()->getPost('order')) {
             $this->_getOrderCreateModel()->importPostData($data);
         }
 
+        $this->_eventManager->dispatch('adminhtml_sales_order_create_process_data_before', $eventData);
+
         /**
          * Initialize catalog rule data
          */