[backport]fix wrong check CustomerMiddleName

Author: Nazar65

app/code/Magento/Catalog/Block/Adminhtml/Product/Edit/Action/Attribute/Tab/Inventory.php

@@ -5,8 +5,6 @@
  */
 namespace Magento\Catalog\Block\Adminhtml\Product\Edit\Action\Attribute\Tab;
 
-use Magento\Customer\Api\Data\GroupInterface;
-
 /**
  * Products mass update inventory tab
  *
@@ -31,11 +29,6 @@ class Inventory extends \Magento\Backend\Block\Widget implements \Magento\Backen
      */
     protected $disabledFields = [];
 
-    /**
-     * @var \Magento\Framework\Serialize\SerializerInterface
-     */
-    private $serializer;
-
     /**
      * @param \Magento\Backend\Block\Template\Context $context
      * @param \Magento\CatalogInventory\Model\Source\Backorders $backorders
@@ -46,13 +39,10 @@ public function __construct(
         \Magento\Backend\Block\Template\Context $context,
         \Magento\CatalogInventory\Model\Source\Backorders $backorders,
         \Magento\CatalogInventory\Api\StockConfigurationInterface $stockConfiguration,
-        array $data = [],
-        \Magento\Framework\Serialize\SerializerInterface $serializer = null
+        array $data = []
     ) {
         $this->_backorders = $backorders;
         $this->stockConfiguration = $stockConfiguration;
-        $this->serializer = $serializer ?? \Magento\Framework\App\ObjectManager::getInstance()
-                ->get(\Magento\Framework\Serialize\SerializerInterface::class);
         parent::__construct($context, $data);
     }
 
@@ -80,11 +70,11 @@ public function getFieldSuffix()
      * Retrieve current store id
      *
      * @return int
+     * @SuppressWarnings(PHPMD.RequestAwareBlockMethod)
      */
     public function getStoreId()
     {
-        $storeId = $this->getRequest()->getParam('store');
-        return (int) $storeId;
+        return (int)$this->getRequest()->getParam('store');
     }
 
     /**
@@ -98,21 +88,6 @@ public function getDefaultConfigValue($field)
         return $this->stockConfiguration->getDefaultConfigValue($field);
     }
 
-    /**
-     * Returns min_sale_qty configuration for the ALL Customer Group
-     * @return int
-     */
-    public function getDefaultMinSaleQty()
-    {
-        $default = $this->stockConfiguration->getDefaultConfigValue('min_sale_qty');
-        if (!is_numeric($default)) {
-            $default = $this->serializer->unserialize($default);
-            $default = isset($default[GroupInterface::CUST_GROUP_ALL]) ? $default[GroupInterface::CUST_GROUP_ALL] : 1;
-        }
-
-        return (int) $default;
-    }
-
     /**
      * Tab settings
      *
@@ -124,6 +99,8 @@ public function getTabLabel()
     }
 
     /**
+     * Return Tab title.
+     *
      * @return \Magento\Framework\Phrase
      */
     public function getTabTitle()
@@ -132,22 +109,24 @@ public function getTabTitle()
     }
 
     /**
-     * @return bool
+     *  @inheritdoc
      */
     public function canShowTab()
     {
         return true;
     }
 
     /**
-     * @return bool
+     *  @inheritdoc
      */
     public function isHidden()
     {
         return false;
     }
 
     /**
+     * Get availability status.
+     *
      * @param string $fieldName
      * @return bool
      * @SuppressWarnings(PHPMD.UnusedFormalParameter)

app/code/Magento/Catalog/view/adminhtml/templates/catalog/product/edit/action/inventory.phtml

@@ -30,6 +30,13 @@
     });
 </script>
 
+<?php
+$defaultMinSaleQty = $block->getDefaultConfigValue('min_sale_qty');
+if (!is_numeric($defaultMinSaleQty)) {
+    $defaultMinSaleQty = json_decode($defaultMinSaleQty, true);
+    $defaultMinSaleQty = (float) $defaultMinSaleQty[\Magento\Customer\Api\Data\GroupInterface::CUST_GROUP_ALL] ?? 1;
+}
+?>
 <div class="fieldset-wrapper form-inline advanced-inventory-edit">
     <div class="fieldset-wrapper-title">
         <strong class="title">
@@ -132,7 +139,7 @@
                     <div class="field">
                         <input type="text" class="input-text validate-number" id="inventory_min_sale_qty"
                                name="<?= /* @escapeNotVerified */ $block->getFieldSuffix() ?>[min_sale_qty]"
-                               value="<?= /* @escapeNotVerified */ $block->getDefaultMinSaleQty() * 1 ?>"
+                               value="<?= /* @escapeNotVerified */ $defaultMinSaleQty ?>"
                                disabled="disabled"/>
                     </div>
                     <div class="field choice">