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. 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: postPersist
                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="postPersist"
                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 https://www.doctrine-project.org/projects/doctrine-orm/en/latest/reference/events.html#entity-listeners for more info on entity listeners and the resolver required by Symfony.