public function __construct()
 {
     parent::__construct();
     $this->_field = 'date_created';
 }
 public function __construct()
 {
     parent::__construct();
     $this->_field = '';
 }
 public function __construct()
 {
     parent::__construct();
     $this->_attr = "hotel.name";
 }
 public function __construct()
 {
     parent::__construct();
     $this->_field = 'date_effect';
 }
 public function __construct()
 {
     parent::__construct();
     $this->_field = 'table_name';
 }