update getCustomer method in order class

Author: sertlab

app/code/Magento/Sales/Api/Data/OrderInterface.php

@@ -5,6 +5,8 @@
  */
 namespace Magento\Sales\Api\Data;
 
+use Magento\Customer\Model\Customer;
+
 /**
  * Order interface.
  *
@@ -910,6 +912,12 @@ public function getCreatedAt();
      */
     public function setCreatedAt($createdAt);
 
+    /**
+     * Gets the customer from Order
+     * @return Customer
+     */
+    public function getCustomer();
+    
     /**
      * Gets the customer date-of-birth (DOB) for the order.
      *

app/code/Magento/Sales/Model/Order.php

@@ -6,6 +6,7 @@
 namespace Magento\Sales\Model;
 
 use Magento\Config\Model\Config\Source\Nooptreq;
+use Magento\Customer\Api\CustomerRepositoryInterface;
 use Magento\Directory\Model\Currency;
 use Magento\Framework\Api\AttributeValueFactory;
 use Magento\Framework\Api\SearchCriteriaBuilder;
@@ -51,7 +52,6 @@
  * @method bool hasCustomerNoteNotify()
  * @method bool hasForcedCanCreditmemo()
  * @method bool getIsInProcess()
- * @method \Magento\Customer\Model\Customer getCustomer()
  * @method \Magento\Sales\Model\Order setSendEmail(bool $value)
  * @SuppressWarnings(PHPMD.ExcessivePublicCount)
  * @SuppressWarnings(PHPMD.TooManyFields)
@@ -307,6 +307,11 @@ class Order extends AbstractModel implements EntityInterface, OrderInterface
      */
     private $scopeConfig;
 
+    /**
+     * @var CustomerRepositoryInterface
+     */
+    private $_customerRepositoryInterface;
+
     /**
      * @param \Magento\Framework\Model\Context $context
      * @param \Magento\Framework\Registry $registry
@@ -340,6 +345,7 @@ class Order extends AbstractModel implements EntityInterface, OrderInterface
      * @param OrderItemRepositoryInterface $itemRepository
      * @param SearchCriteriaBuilder $searchCriteriaBuilder
      * @param ScopeConfigInterface $scopeConfig
+     * @param CustomerRepositoryInterface $customerRepositoryInterface
      * @SuppressWarnings(PHPMD.ExcessiveParameterList)
      */
     public function __construct(
@@ -366,6 +372,7 @@ public function __construct(
         \Magento\Sales\Model\ResourceModel\Order\Shipment\Track\CollectionFactory $trackCollectionFactory,
         \Magento\Sales\Model\ResourceModel\Order\CollectionFactory $salesOrderCollectionFactory,
         PriceCurrencyInterface $priceCurrency,
+        CustomerRepositoryInterface $customerRepositoryInterface,
         \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productListFactory,
         \Magento\Framework\Model\ResourceModel\AbstractResource $resource = null,
         \Magento\Framework\Data\Collection\AbstractDb $resourceCollection = null,
@@ -403,6 +410,7 @@ public function __construct(
         $this->searchCriteriaBuilder = $searchCriteriaBuilder ?: ObjectManager::getInstance()
             ->get(SearchCriteriaBuilder::class);
         $this->scopeConfig = $scopeConfig ?: ObjectManager::getInstance()->get(ScopeConfigInterface::class);
+        $this->_customerRepositoryInterface = $customerRepositoryInterface;
 
         parent::__construct(
             $context,
@@ -562,6 +570,19 @@ public function getStore()
         return $this->_storeManager->getStore();
     }
 
+    /**
+     * Returns Customer
+     *
+     * @return \Magento\Customer\Api\Data\CustomerInterface
+     * @throws LocalizedException
+     * @throws \Magento\Framework\Exception\NoSuchEntityException
+     */
+    public function getCustomer()
+    {
+        $customerId = $this->getData(OrderInterface::CUSTOMER_ID);
+        return $this->_customerRepositoryInterface->getById($customerId);
+    }
+
     /**
      * Retrieve order cancel availability
      *