[ResourceBundle] add JMS Serializer Handler for Pimcore Objects

src/CoreShop/Bundle/ResourceBundle/Resources/config/services.yml

@@ -25,6 +25,11 @@ services:
             - { name: jms_serializer.handler, type: relation<?>, direction: serialization, format: json, method: serializeRelation}
             - { name: jms_serializer.handler, type: relation<?>, direction: deserialization, format: json, method: deserializeRelation}
 
+    coreshop.jms_serializer.handler.pimcore_object:
+        class: CoreShop\Bundle\ResourceBundle\Serialization\PimcoreObjectHandler
+        tags:
+            - { name: jms_serializer.handler, type: pimcoreObject, direction: serialization, format: json, method: serializeRelation}
+
     jms_serializer.object_constructor:
         alias: jms_serializer.doctrine_object_constructor
         public: false

src/CoreShop/Bundle/ResourceBundle/Serialization/PimcoreObjectHandler.php

@@ -0,0 +1,29 @@
+<?php
+/**
+ * CoreShop.
+ *
+ * This source file is subject to the GNU General Public License version 3 (GPLv3)
+ * For the full copyright and license information, please view the LICENSE.md and gpl-3.0.txt
+ * files that are distributed with this source code.
+ *
+ * @copyright  Copyright (c) 2015-2019 Dominik Pfaffenbauer (https://www.pfaffenbauer.at)
+ * @license    https://www.coreshop.org/license     GNU General Public License version 3 (GPLv3)
+ */
+
+namespace CoreShop\Bundle\ResourceBundle\Serialization;
+
+use JMS\Serializer\Context;
+use JMS\Serializer\JsonSerializationVisitor;
+use Pimcore\Model\DataObject\Concrete;
+
+class PimcoreObjectHandler
+{
+    public function serializeRelation(JsonSerializationVisitor $visitor, $relation, array $type, Context $context)
+    {
+        if ($relation instanceof Concrete) {
+            return $relation->getId();
+        }
+
+        return null;
+    }
+}