gistfile1.txt

<?xml version="1.0" encoding="UTF-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
                  http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
    <entity name="AFD\SMSBundle\Entity\Client\Group" table="client_user_group">
        <id name="id" type="integer" column="id">
            <generator strategy="AUTO" />
        </id>
        
        <many-to-many field="users" target-entity="AFD\SMSBundle\Entity\Client\User" mapped-by="groups">
	        <join-table name="client_user_client_user_group">
	                <join-columns>
	                    <join-column id="group_id" name="group_id" referenced-column-name="id" />
	                </join-columns>
	                <inverse-join-columns>
	                    <join-column id="user_id" name="user_id" referenced-column-name="id" />
	                </inverse-join-columns>
	        </join-table>
        </many-to-many>
    </entity>    
</doctrine-mapping>