MAGETWO-56955 [Backport] - Validation message displayed all the time - for 2.0 MAGETWO-57681 [GITHUB] Customer cannot reorder if the order has been invoiced or shipped #6278

416.patch

diff --git a/app/code/Magento/Sales/Model/ResourceModel/Order/Item/Collection.php b/app/code/Magento/Sales/Model/ResourceModel/Order/Item/Collection.php
index 8872525..9fa5c8a 100644
--- a/app/code/Magento/Sales/Model/ResourceModel/Order/Item/Collection.php
+++ b/app/code/Magento/Sales/Model/ResourceModel/Order/Item/Collection.php
@@ -55,6 +55,7 @@ protected function _afterLoad()
          * Assign parent items
          */
         foreach ($this as $item) {
+            $this->_resource->unserializeFields($item);
             if ($item->getParentItemId()) {
                 $item->setParentItem($this->getItemById($item->getParentItemId()));
             }
diff --git a/app/code/Magento/Theme/view/frontend/web/js/view/messages.js b/app/code/Magento/Theme/view/frontend/web/js/view/messages.js
index 2969fde..ef4fe41 100644
--- a/app/code/Magento/Theme/view/frontend/web/js/view/messages.js
+++ b/app/code/Magento/Theme/view/frontend/web/js/view/messages.js
@@ -5,9 +5,10 @@
 define([
     'jquery',
     'uiComponent',
+    'underscore',
     'Magento_Customer/js/customer-data',
     'jquery/jquery-storageapi'
-], function ($, Component, customerData) {
+], function ($, Component, _, customerData) {
     'use strict';
 
     return Component.extend({
@@ -15,12 +16,24 @@ define([
             cookieMessages: [],
             messages: []
         },
+
+        /** @inheritdoc */
         initialize: function () {
             this._super();
 
             this.cookieMessages = $.cookieStorage.get('mage-messages');
-            this.messages = customerData.get('messages').extend({disposableCustomerData: 'messages'});
-            $.cookieStorage.setConf({path: '/', expires: -1}).set('mage-messages', null);
+            this.messages = customerData.get('messages').extend({
+                disposableCustomerData: 'messages'
+            });
+
+            if (!_.isEmpty(this.messages().messages)) {
+                customerData.set('messages', {});
+            }
+
+            $.cookieStorage.setConf({
+                path: '/',
+                expires: -1
+            }).set('mage-messages', null);
         }
     });
 });
diff --git a/dev/tests/integration/testsuite/Magento/Sales/Model/ResourceModel/OrderItemTest.php b/dev/tests/integration/testsuite/Magento/Sales/Model/ResourceModel/OrderItemTest.php
new file mode 100644
index 0000000..e23ecd9
--- /dev/null
+++ b/dev/tests/integration/testsuite/Magento/Sales/Model/ResourceModel/OrderItemTest.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ * Copyright © 2016 Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\Sales\Model\ResourceModel;
+
+class OrderItemTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var \Magento\Framework\ObjectManagerInterface
+     */
+    private $objectManager;
+
+    protected function setUp()
+    {
+        $this->objectManager = \Magento\TestFramework\Helper\Bootstrap::getObjectManager();
+    }
+
+    /**
+     * Verify that serialized order item data was unserialized after load
+     *
+     * @magentoDataFixture Magento/Catalog/_files/order_item_with_product_and_custom_options.php
+     */
+    public function testGetOrderItem()
+    {
+        /** @var \Magento\Sales\Model\Order $order */
+        $order = $this->objectManager->create(\Magento\Sales\Model\Order::class);
+        $order->loadByIncrementId('100000001');
+        $items = $order->getItemsCollection();
+        $this->assertNotEquals(0, $items->getSize());
+        foreach ($items as $item) {
+            $info = $item->getDataByKey('product_options');
+            $this->assertTrue(is_array($info));
+        }
+    }
+}