public function __construct($params = null)
 {
     if (!parent::require_connection()) {
         $this->set_error(102);
     }
     parent::__construct($params);
 }
 public function __construct($params = null)
 {
     if (!parent::require_connection()) {
         $this->set_error(102);
     }
     parent::set_input_keys(array('id'));
     parent::__construct($params);
 }