Gallery.orm.xml

<?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">
    <!--
         This file has been generated by the EasyExtends bundle ( https://sonata-project.org/easy-extends )

         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\Application\Sonata\MediaBundle\Entity\Gallery"
        table="media__gallery"
        >

        <id name="id" type="integer" column="id">
            <generator strategy="AUTO"/>
        </id>

    </entity>
</doctrine-mapping>