MessageSource::model PHP Метод

    static function model($className = __CLASS__)
    {
        return parent::model($className);
    }

 /**
  * Creates a message if form has been submitted or renders the creation/update form
  */
 public function actionCreate()
 {
     if (isset($_POST['Message'])) {
         $resp = array('color' => '#FF6600', 'background_color' => '#FFFFCC', 'position' => 'top', 'removebutton' => 0);
         $model = new Message();
         $model->setAttributes($_POST['Message']);
         if ($model->save()) {
             $resp['message'] = Yii::t('translate', 'Message successfully saved');
             $resp['id'] = $model->id;
         } else {
             $errors = $this->errors($model);
             $resp['message'] = Yii::t('translate', '<p>Unable to save the message. Something went wrong!<p/>' . implode('<br/>', $errors));
         }
         echo $this->je($resp);
         Yii::app()->end();
     }
     $id = (int) Yii::app()->request->getParam('id');
     $lang = Yii::app()->request->getParam('lang');
     if ($id && $lang) {
         $model = MessageSource::model()->findByPk($id);
         if ($model) {
             $message = $model->loadMessage();
             $message->id = $model->id;
             $message->language = $lang;
             $this->renderPartial('form', array('model' => $message));
         } else {
             throw new CHttpException(400);
         }
     } else {
         throw new CHttpException(404, 'The requested page does not exist.');
     }
 }