Ya le he intentado pero me sale el siguiente error.
Código PHP:
Ver original$select = $this->select()
->from(array('p' => 'projects')) ->join(array('pm' => 'permissions'),'p.Id_Permission = pm.Id_Permission', array('pm.Description' =>'Description')) ->join(array('l' => 'languages'), 'p.Id_Language = l.Id_Language',array()) ->where('p.Id_User_Project = '.(int)$id)
->where('p.State_Project = 1')
->where('pm.State_Permission = 1')
->where('l.State_Language = 1');
Warning: Select query cannot join with another table