Use xml doctrine orm mapping

Author: covex-nn

sonata-project/notification-bundle/3.4/metadata/doctrine/SonataNotificationMessage.orm.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<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 http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
+    <!--
+         References :
+            xsd                  : https://github.com/doctrine/doctrine2/blob/master/doctrine-mapping.xsd
+            xml mapping          : http://www.doctrine-project.org/projects/orm/2.0/docs/reference/xml-mapping/en
+            association mapping  : http://www.doctrine-project.org/projects/orm/2.0/docs/reference/association-mapping/en
+    -->
+    <entity
+        name="App\Entity\SonataNotificationMessage"
+        table="notification__message"
+        repository-class="Doctrine\ORM\EntityRepository">
+
+        <id name="id" type="integer" column="id">
+            <generator strategy="AUTO"/>
+        </id>
+    </entity>
+</doctrine-mapping>

sonata-project/notification-bundle/3.4/src/Entity/SonataNotificationMessage.php

@@ -2,23 +2,18 @@
 
 namespace App\Entity;
 
-use Doctrine\ORM\Mapping as ORM;
-use Sonata\NotificationBundle\Entity\BaseMessage;
-
-/**
- * @ORM\Entity
- * @ORM\Table(name="notification__message")
- */
 class SonataNotificationMessage extends BaseMessage
 {
     /**
-     * @ORM\Id
-     * @ORM\Column(type="integer")
-     * @ORM\GeneratedValue(strategy="AUTO")
-     * @var int
+     * @var int $id
      */
     protected $id;
 
+    /**
+     * Get id.
+     *
+     * @return int $id
+     */
     public function getId()
     {
         return $this->id;