entity-listeners.rst

Entity Listeners

Entity listeners that are services must be registered with the entity listener resolver. You can tag your entity listeners and they will automatically be added to the resolver. Compulsory attributes are 'name, event and entity.' Use the entity_manager attribute to specify which entity manager it should be registered with. Example:

services:
    user_listener:
        class: \UserListener
        tags:
            - { name: doctrine.orm.entity_listener, event: preUpdate, entity: App\Entity\User }
            - 
                name: doctrine.orm.entity_listener
                event: preUpdate
                entity: App\Entity\User
                entity_manager: custom

<?xml version="1.0" ?>

<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

    <services>
        <service id="user_listener" class="UserListener">
            <tag name="doctrine.orm.entity_listener" event="preUpdate" entity="App\Entity\User" />
            <tag name="doctrine.orm.entity_listener" event="preUpdate" entity="App\Entity\User" entity_manager="custom" />
        </service>
    </services>
</container>

If you use a version of doctrine/orm < 2.5 you have to register the entity listener in your entity as well:

<?php
// User.php

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 * @ORM\EntityListeners({"UserListener"})
 */
class User
{
    // ....
}

See also http://doctrine-orm.readthedocs.org/en/latest/reference/events.html#entity-listeners for more info on entity listeners and the resolver required by Symfony.