diff --git a/application/Espo/Core/Select/Applier/Appliers/Order.php b/application/Espo/Core/Select/Applier/Appliers/Order.php
index 92651ac16b..b33f3cdb6a 100644
--- a/application/Espo/Core/Select/Applier/Appliers/Order.php
+++ b/application/Espo/Core/Select/Applier/Appliers/Order.php
@@ -29,6 +29,8 @@
 
 namespace Espo\Core\Select\Applier\Appliers;
 
+use Espo\ORM\Query\Part\OrderList;
+
 use Espo\Core\{
     Exceptions\Error,
     Exceptions\Forbidden,
@@ -141,11 +143,13 @@ class Order
         if ($hasItemConverter) {
             $converter = $this->itemConverterFactory->create($this->entityType, $orderBy);
 
-            $resultOrderBy = $converter->convert(
-                OrderItem::fromArray([
-                    'orderBy' => $orderBy,
-                    'order' => $order,
-                ])
+            $resultOrderBy = $this->orderListToArray(
+                $converter->convert(
+                    OrderItem::fromArray([
+                        'orderBy' => $orderBy,
+                        'order' => $order,
+                    ])
+                )
             );
         }
         else if (in_array($type, ['link', 'file', 'image', 'linkOne'])) {
@@ -185,4 +189,18 @@ class Order
 
         $queryBuilder->order($resultOrderBy);
     }
+
+    private function orderListToArray(OrderList $orderList): array
+    {
+        $list = [];
+
+        foreach ($orderList as $order) {
+            $list[] = [
+                $order->getExpression()->getValue(),
+                $order->getDirection(),
+            ];
+        }
+
+        return $list;
+    }
 }
diff --git a/application/Espo/Core/Select/Order/ItemConverter.php b/application/Espo/Core/Select/Order/ItemConverter.php
index 0593a1b04c..b5cc820b04 100644
--- a/application/Espo/Core/Select/Order/ItemConverter.php
+++ b/application/Espo/Core/Select/Order/ItemConverter.php
@@ -29,7 +29,9 @@
 
 namespace Espo\Core\Select\Order;
 
+use Espo\ORM\Query\Part\OrderList;
+
 interface ItemConverter
 {
-    public function convert(Item $item): array;
+    public function convert(Item $item): OrderList;
 }
diff --git a/application/Espo/Core/Select/Order/ItemConverters/AddressType.php b/application/Espo/Core/Select/Order/ItemConverters/AddressType.php
index 6fb45b04c2..2cc95cd252 100644
--- a/application/Espo/Core/Select/Order/ItemConverters/AddressType.php
+++ b/application/Espo/Core/Select/Order/ItemConverters/AddressType.php
@@ -29,6 +29,9 @@
 
 namespace Espo\Core\Select\Order\ItemConverters;
 
+use Espo\ORM\Query\Part\OrderList;
+use Espo\ORM\Query\Part\Order;
+
 use Espo\Core\{
     Select\Order\ItemConverter,
     Select\Order\Item,
@@ -36,15 +39,15 @@ use Espo\Core\{
 
 class AddressType implements ItemConverter
 {
-    public function convert(Item $item): array
+    public function convert(Item $item): OrderList
     {
         $orderBy = $item->getOrderBy();
-        $order = $item->getOrder();
+        $order = $item->getOrder() ?? Order::ASC;
 
-        return [
-            [$orderBy . 'Country', $order],
-            [$orderBy . 'City', $order],
-            [$orderBy . 'Street', $order],
-        ];
+        return OrderList::create([
+            Order::fromString($orderBy . 'Country')->withDirection($order),
+            Order::fromString($orderBy . 'City')->withDirection($order),
+            Order::fromString($orderBy . 'Street')->withDirection($order),
+        ]);
     }
 }
diff --git a/application/Espo/Core/Select/Order/ItemConverters/EnumType.php b/application/Espo/Core/Select/Order/ItemConverters/EnumType.php
index bbc53f0316..9fab7e4fa3 100644
--- a/application/Espo/Core/Select/Order/ItemConverters/EnumType.php
+++ b/application/Espo/Core/Select/Order/ItemConverters/EnumType.php
@@ -29,6 +29,10 @@
 
 namespace Espo\Core\Select\Order\ItemConverters;
 
+use Espo\ORM\Query\Part\OrderList;
+use Espo\ORM\Query\Part\Order;
+use Espo\ORM\Query\Part\Expression;
+
 use Espo\Core\{
     Select\Order\ItemConverter,
     Select\Order\Item,
@@ -50,19 +54,19 @@ class EnumType implements ItemConverter
         $this->metadata = $metadata;
     }
 
-    public function convert(Item $item): array
+    public function convert(Item $item): OrderList
     {
         $orderBy = $item->getOrderBy();
-        $order = $item->getOrder();
+        $order = $item->getOrder() ?? SearchParams::ORDER_ASC;
 
         $list = $this->metadata->get([
             'entityDefs', $this->entityType, 'fields', $orderBy, 'options'
         ]);
 
         if (!$list || !is_array($list) || !count($list)) {
-            return [
-                [$orderBy, $order]
-            ];
+            return OrderList::create([
+                Order::fromString($orderBy)->withDirection($order)
+            ]);
         }
 
         $isSorted = $this->metadata->get([
@@ -77,14 +81,8 @@ class EnumType implements ItemConverter
             $list = array_reverse($list);
         }
 
-        foreach ($list as $i => $listItem) {
-            $list[$i] = str_replace(',', '_COMMA_', $listItem);
-        }
-
-        return [
-            [
-                'LIST:' . $orderBy . ':' . implode(',', $list)
-            ]
-        ];
+        return OrderList::create([
+            Order::createByPositionInList(Expression::column($orderBy), $list),
+        ]);
     }
 }
diff --git a/application/Espo/ORM/Query/Part/OrderList.php b/application/Espo/ORM/Query/Part/OrderList.php
new file mode 100644
index 0000000000..901031807b
--- /dev/null
+++ b/application/Espo/ORM/Query/Part/OrderList.php
@@ -0,0 +1,100 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2021 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\ORM\Query\Part;
+
+use InvalidArgumentException;
+use Iterator;
+
+/**
+ * A list of order items.
+ */
+class OrderList implements Iterator
+{
+    private $position = 0;
+
+    private function __construct(array $list)
+    {
+        foreach ($list as $item) {
+            if (!$item instanceof Order) {
+                throw new InvalidArgumentException();
+            }
+        }
+
+        $this->list = $list;
+    }
+
+    /**
+     * Create an instance.
+     *
+     * @param Order[] $list
+     */
+    public static function create(array $list): self
+    {
+        return new self($list);
+    }
+
+    /**
+     * @return void
+     */
+    public function rewind()
+    {
+        $this->position = 0;
+    }
+
+    /**
+     * @return Order
+     */
+    public function current()
+    {
+        return $this->list[$this->position];
+    }
+
+    /**
+     *
+     * @return int
+     */
+    public function key()
+    {
+        return $this->position;
+    }
+
+    public function next()
+    {
+        ++$this->position;
+    }
+
+    /**
+     * @return bool
+     */
+    public function valid()
+    {
+        return isset($this->list[$this->position]);
+    }
+}
diff --git a/tests/unit/Espo/Core/Select/Applier/Appliers/OrderApplierTest.php b/tests/unit/Espo/Core/Select/Applier/Appliers/OrderApplierTest.php
index 2a28296fff..f786503bd8 100644
--- a/tests/unit/Espo/Core/Select/Applier/Appliers/OrderApplierTest.php
+++ b/tests/unit/Espo/Core/Select/Applier/Appliers/OrderApplierTest.php
@@ -29,6 +29,9 @@
 
 namespace tests\unit\Espo\Core\Select\Applier\Appliers;
 
+use Espo\ORM\Query\Part\OrderList;
+use Espo\ORM\Query\Part\Order;
+
 use Espo\Core\{
     Exceptions\Error,
     Select\Applier\Appliers\Order as OrderApplier,
@@ -47,7 +50,7 @@ use Espo\{
 
 class OrderApplierTest extends \PHPUnit\Framework\TestCase
 {
-    protected function setUp() : void
+    protected function setUp(): void
     {
         $this->user = $this->createMock(User::class);
         $this->metadataProvider = $this->createMock(MetadataProvider::class);
@@ -147,7 +150,11 @@ class OrderApplierTest extends \PHPUnit\Framework\TestCase
             ->with($this->entityType)
             ->willReturn($orderBy);
 
-        $this->initApplyOrderTest($orderBy, $order, 'varchar', [['hello', SearchParams::ORDER_DESC]]);
+        $converterResult = OrderList::create([
+            Order::fromString('hello')->withDesc(),
+        ]);
+
+        $this->initApplyOrderTest($orderBy, $order, 'varchar', $converterResult);
 
         $this->applier->apply($this->queryBuilder, $this->params);
     }
@@ -184,7 +191,7 @@ class OrderApplierTest extends \PHPUnit\Framework\TestCase
     }
 
     protected function initApplyOrderTest(
-        string $orderBy, string $order, string $fieldType, ?array $converterResult = null, bool $notExisting = false
+        string $orderBy, string $order, string $fieldType, ?OrderList $converterResult = null, bool $notExisting = false
     ) {
         $this->metadataProvider
             ->expects($this->any())
@@ -246,7 +253,8 @@ class OrderApplierTest extends \PHPUnit\Framework\TestCase
                 ->willReturn(false);
         }
 
-        $expectedOrderBy = $converterResult ?? [[$orderBy, $order]];
+        $expectedOrderBy = ($converterResult ? $this->orderListToArray($converterResult): null)
+            ?? [[$orderBy, $order]];
 
         $expectedOrderBy[] = ['id', $order];
 
@@ -255,4 +263,18 @@ class OrderApplierTest extends \PHPUnit\Framework\TestCase
             ->method('order')
             ->with($expectedOrderBy);
     }
+
+    private function orderListToArray(OrderList $orderList): array
+    {
+        $list = [];
+
+        foreach ($orderList as $order) {
+            $list[] = [
+                $order->getExpression()->getValue(),
+                $order->getDirection(),
+            ];
+        }
+
+        return $list;
+    }
 }