diff --git a/test/assets/module/ZFTestApigilityDb/config/xml/ZFTestApigilityDb.Entity.Product.dcm.xml b/test/assets/module/ZFTestApigilityDb/config/xml/ZFTestApigilityDb.Entity.Product.dcm.xml
new file mode 100644
index 00000000..3047656b
--- /dev/null
+++ b/test/assets/module/ZFTestApigilityDb/config/xml/ZFTestApigilityDb.Entity.Product.dcm.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping" xsi="http://www.w3.org/2001/XMLSchema-instance" schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
+  <entity name="ZFTestApigilityDb\Entity\Product">
+    <id name="id" type="rev">
+      <generator strategy="CUSTOM"/>
+      <custom-id-generator class="ZFTestApigilityDb\Type\RevGenerator"/>
+    </id>
+  </entity>
+</doctrine-mapping>
diff --git a/test/assets/module/ZFTestApigilityDb/src/ZFTestApigilityDb/Entity/Product.php b/test/assets/module/ZFTestApigilityDb/src/ZFTestApigilityDb/Entity/Product.php
new file mode 100644
index 00000000..f0018bf1
--- /dev/null
+++ b/test/assets/module/ZFTestApigilityDb/src/ZFTestApigilityDb/Entity/Product.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace ZFTestApigilityDb\Entity;
+
+class Product
+{
+    protected $id;
+
+    public function getId()
+    {
+        return $this->id;
+    }
+}
diff --git a/test/assets/module/ZFTestApigilityDb/src/ZFTestApigilityDb/Type/RevGenerator.php b/test/assets/module/ZFTestApigilityDb/src/ZFTestApigilityDb/Type/RevGenerator.php
new file mode 100644
index 00000000..1ccf313b
--- /dev/null
+++ b/test/assets/module/ZFTestApigilityDb/src/ZFTestApigilityDb/Type/RevGenerator.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace ZFTestApigilityDb\Type;
+
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\Id\AbstractIdGenerator;
+
+class RevGenerator extends AbstractIdGenerator
+{
+    public function generate(EntityManager $em, $entity)
+    {
+        do {
+            $value = md5(time() . mt_rand());
+        } while ($value === strrev($value));
+
+        return $value;
+    }
+}
diff --git a/test/assets/module/ZFTestApigilityDb/src/ZFTestApigilityDb/Type/RevType.php b/test/assets/module/ZFTestApigilityDb/src/ZFTestApigilityDb/Type/RevType.php
new file mode 100644
index 00000000..0bd2b44d
--- /dev/null
+++ b/test/assets/module/ZFTestApigilityDb/src/ZFTestApigilityDb/Type/RevType.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace ZFTestApigilityDb\Type;
+
+use Doctrine\DBAL\Types\Type;
+use Doctrine\DBAL\Platforms\AbstractPlatform;
+
+class RevType extends Type
+{
+    const NAME = 'rev';
+
+    public function getSQLDeclaration(array $fieldDeclaration, AbstractPlatform $platform)
+    {
+        return $platform->getGuidTypeDeclarationSQL($fieldDeclaration);
+    }
+
+    public function convertToPHPValue($value, AbstractPlatform $platform)
+    {
+        if (! $value) {
+            return null;
+        }
+
+        return strrev($value);
+    }
+
+    public function convertToDatabaseValue($value, AbstractPlatform $platform)
+    {
+        if (! $value) {
+            return null;
+        }
+
+        return strrev($value);
+    }
+
+    public function getName()
+    {
+        return static::NAME;
+    }
+
+    public function requiresSQLCommentHint(AbstractPlatform $platform)
+    {
+        return true;
+    }
+}
diff --git a/test/config/ORM/local.php b/test/config/ORM/local.php
index a61014f4..261e9dbf 100644
--- a/test/config/ORM/local.php
+++ b/test/config/ORM/local.php
@@ -1,9 +1,11 @@
 <?php
 /**
  * @license   http://opensource.org/licenses/BSD-3-Clause BSD-3-Clause
- * @copyright Copyright (c) 2016 Zend Technologies USA Inc. (http://www.zend.com)
+ * @copyright Copyright (c) 2016-2018 Zend Technologies USA Inc. (http://www.zend.com)
  */
 
+use ZFTestApigilityDb\Type\RevType;
+
 return [
     'doctrine' => [
         'connection' => [
@@ -16,5 +18,12 @@
                 ],
             ],
         ],
+        'configuration' => [
+            'orm_default' => [
+                'types' => [
+                    RevType::NAME => RevType::class,
+                ],
+            ],
+        ],
     ],
 ];
diff --git a/test/src/Server/ORM/CRUD/CRUDTest.php b/test/src/Server/ORM/CRUD/CRUDTest.php
index ca7563b9..56f35f35 100644
--- a/test/src/Server/ORM/CRUD/CRUDTest.php
+++ b/test/src/Server/ORM/CRUD/CRUDTest.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * @license   http://opensource.org/licenses/BSD-3-Clause BSD-3-Clause
- * @copyright Copyright (c) 2016 Zend Technologies USA Inc. (http://www.zend.com)
+ * @copyright Copyright (c) 2016-2018 Zend Technologies USA Inc. (http://www.zend.com)
  */
 
 namespace ZFTest\Apigility\Doctrine\Server\ORM\CRUD;
@@ -22,6 +22,7 @@
 use ZFTest\Apigility\Doctrine\TestCase;
 use ZFTestApigilityDb\Entity\Album;
 use ZFTestApigilityDb\Entity\Artist;
+use ZFTestApigilityDb\Entity\Product;
 use ZFTestApigilityGeneral\Listener\EventCatcher;
 
 class CRUDTest extends TestCase
@@ -94,14 +95,31 @@ protected function buildORMApi()
             ],
         ];
 
+        $productResourceDefinition = [
+            'objectManager'         => 'doctrine.entitymanager.orm_default',
+            'serviceName'           => 'Product',
+            'entityClass'           => Product::class,
+            'routeIdentifierName'   => 'product_id',
+            'entityIdentifierName'  => 'id',
+            'routeMatch'            => '/test/rest/product',
+            'collectionHttpMethods' => [
+                0 => 'GET',
+                1 => 'POST',
+                2 => 'PATCH',
+                3 => 'DELETE',
+            ],
+        ];
+
         $this->setModuleName($restServiceResource, 'ZFTestApigilityDbApi');
         $artistEntity       = $restServiceResource->create($artistResourceDefinition);
         $artistByNameEntity = $restServiceResource->create($artistResourceDefinitionWithNonKeyIdentifier);
         $albumEntity        = $restServiceResource->create($albumResourceDefinition);
+        $productEntity      = $restServiceResource->create($productResourceDefinition);
 
         $this->assertInstanceOf(DoctrineRestServiceEntity::class, $artistEntity);
         $this->assertInstanceOf(DoctrineRestServiceEntity::class, $artistByNameEntity);
         $this->assertInstanceOf(DoctrineRestServiceEntity::class, $albumEntity);
+        $this->assertInstanceOf(DoctrineRestServiceEntity::class, $productEntity);
 
         // Build relation
         $filter = new FilterChain();
@@ -221,6 +239,37 @@ function (DoctrineResourceEvent $e) {
         $this->assertEquals('ZFTestCreateFailure', $body['detail']);
     }
 
+    public function testFetchByCustomIdField()
+    {
+        $product = $this->createProduct();
+
+        $this->getRequest()->getHeaders()->addHeaderLine('Accept', 'application/json');
+        $this->getRequest()->setMethod(Request::METHOD_GET);
+
+        $this->dispatch('/test/rest/product/' . $product->getId());
+        $body = json_decode($this->getResponse()->getBody(), true);
+
+        $this->assertResponseStatusCode(200);
+        $this->assertEquals($product->getId(), $body['id']);
+        $this->validateTriggeredEvents([
+            DoctrineResourceEvent::EVENT_FETCH_PRE,
+            DoctrineResourceEvent::EVENT_FETCH_POST,
+        ]);
+    }
+
+    public function testFetchByCustomIdFieldWithInvalidIdValue()
+    {
+        $product = $this->createProduct();
+
+        $this->getRequest()->getHeaders()->addHeaderLine('Accept', 'application/json');
+        $this->getRequest()->setMethod(Request::METHOD_GET);
+
+        $this->dispatch('/test/rest/product/' . strrev($product->getId()));
+
+        $this->assertResponseStatusCode(404);
+        $this->validateTriggeredEvents([DoctrineResourceEvent::EVENT_FETCH_PRE]);
+    }
+
     public function testFetch()
     {
         $artist = $this->createArtist('Artist Name');
@@ -723,4 +772,16 @@ protected function createAlbum($name = null, Artist $artist = null)
 
         return $album;
     }
+
+    /**
+     * @return Product
+     */
+    protected function createProduct()
+    {
+        $product = new Product();
+        $this->em->persist($product);
+        $this->em->flush();
+
+        return $product;
+    }
 }