15.1. Example¶

1. Alice starts to edit the object
2. Bob starts to edit the object
3. Alice submits the form
4. Bob submits the form

In this case, a message will tell Bob that someone else has edited the object, and that he must reload the page and apply the changes again.

15.2. Enable Lock Protection¶

By default, lock protection is disabled. You can enable it in your sonata_admin configuration:

You must also configure each entity that you want to support by adding a field called $version on which the Doctrine Version feature is activated.

Using Annotations:

// src/Entity/Car.php

namespace App\Entity\Car;

use Doctrine\ORM\Mapping as ORM;

class Car
{
    // ...

    /**
     * @ORM\Column(type="integer")
     * @ORM\Version
     */
    protected $version;

    // ...
}

Using XML:

<?xml version="1.0" encoding="UTF-8"?>
<!-- src/Resources/orm/Car.orm.xml -->
<doctrine-mapping>
    <entity name="App\Entity\Car">
        <!-- ... -->

        <field name="version" type="integer" version="true"/>

        <!-- ... -->
    </entity>
</doctrine-mapping>

For more information about this visit the Doctrine docs