Miscellany

 $q->select('i.name,i.id,g.id,g.name,t.id')
            ->from('Transaction t')
            ->leftJoin('t.Item i')
            ->leftJoin('i.Game g')
            ->leftJoin('i.User u ON t.buyer_id = u.id')
            ->where('t.buyer_id = ?')
            ->execute(array($this->getUser()->getId()));