/** * Returns the data model based on the primary key given in the GET variable. * If the data model is not found, an HTTP exception will be raised. */ public function loadModel() { if ($this->_model === null) { if (isset($_GET['id'])) { $this->_model = ClassMeeting::model()->findbyPk($_GET['id']); } if ($this->_model === null) { throw new CHttpException(404, 'The requested page does not exist.'); } } return $this->_model; }