Grid export issue task 25963

app/code/Magento/Sales/Model/ResourceModel/Order/Grid/Collection.php

@@ -8,13 +8,21 @@
 use Magento\Framework\Data\Collection\Db\FetchStrategyInterface as FetchStrategy;
 use Magento\Framework\Data\Collection\EntityFactoryInterface as EntityFactory;
 use Magento\Framework\Event\ManagerInterface as EventManager;
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Sales\Ui\Component\DataProvider\Order\Document;
 use Psr\Log\LoggerInterface as Logger;
 
 /**
  * Order grid collection
  */
 class Collection extends \Magento\Framework\View\Element\UiComponent\DataProvider\SearchResult
 {
+
+    /**
+     * @inheritdoc
+     */
+    protected $document = Document::class;
+
     /**
      * Initialize dependencies.
      *
@@ -24,6 +32,7 @@ class Collection extends \Magento\Framework\View\Element\UiComponent\DataProvide
      * @param EventManager $eventManager
      * @param string $mainTable
      * @param string $resourceModel
+     * @throws LocalizedException
      */
     public function __construct(
         EntityFactory $entityFactory,

app/code/Magento/Sales/Ui/Component/DataProvider/Order/Document.php

@@ -0,0 +1,71 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\Sales\Ui\Component\DataProvider\Order;
+
+use Magento\Customer\Api\GroupRepositoryInterface;
+use Magento\Framework\Api\AttributeValueFactory;
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Framework\Exception\NoSuchEntityException;
+
+/**
+ * Class Document
+ */
+class Document extends \Magento\Framework\View\Element\UiComponent\DataProvider\Document
+{
+
+    /**
+     * @var string
+     */
+    private static $customerGroupAttributeCode = 'customer_group';
+
+    /**
+     * @var GroupRepositoryInterface
+     */
+    private $groupRepository;
+
+    /**
+     * Document constructor.
+     *
+     * @param AttributeValueFactory $attributeValueFactory
+     * @param GroupRepositoryInterface $groupRepository
+     */
+    public function __construct(
+        AttributeValueFactory $attributeValueFactory,
+        GroupRepositoryInterface $groupRepository
+    ) {
+        parent::__construct($attributeValueFactory);
+        $this->groupRepository = $groupRepository;
+    }
+
+    /**
+     * @inheritdoc
+     * @throws LocalizedException
+     */
+    public function getCustomAttribute($attributeCode)
+    {
+        if (self::$customerGroupAttributeCode === $attributeCode) {
+            $this->setCustomerGroupValue();
+        }
+        return parent::getCustomAttribute($attributeCode);
+    }
+
+    /**
+     * Method set group code instead id value
+     *
+     * @return void
+     * @throws LocalizedException
+     */
+    private function setCustomerGroupValue()
+    {
+        $value = $this->getData(self::$customerGroupAttributeCode);
+        try {
+            $group = $this->groupRepository->getById($value);
+            $this->setCustomAttribute(self::$customerGroupAttributeCode, $group->getCode());
+        } catch (NoSuchEntityException $e) {
+            $this->setCustomAttribute(self::$customerGroupAttributeCode, 'N/A');
+        }
+    }
+}