Create a relation between two Entities in different EntityManager

Hello,

I'm working on a Symfony based CMS for a game server. The game server use two databases (the `auth` database and `characters` database) and i've created a new one for the CMS named `site`.

Currently my News entity must have a relation with the Account entity but the News entity come from the Site EntityManager (who manage the `site` database) and the Account entity come from the Auth EntityManager (who manage the `auth` database).

So, when I prompt the command "php app/console doctrine:schema:update --em="site" --force" I got the error "Class Eluna\MemberBundle\Entity\Account is not a valid entity or mapped super class." But if I join an entity who is in the same EntityManager it work perfectly.

My code :

    /**
     * @var object $author
     *
     * @ORM\ManyToOne(targetEntity="Eluna\MemberBundle\Entity\Account")
     * @ORM\JoinColumn(name="author", referencedColumnName="id")
     */
    private $author;