Menu::model PHP Method

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

 public function actionIndex()
 {
     //lay 1 tin moi de hien thi phan tin tuc
     $headTab = new Menu();
     $numHeadTab1 = $headTab->model()->find('alias="tin-dia-phuong"')->id;
     $cdbNewsLocal = new CDbCriteria();
     $cdbNewsLocal->order = 'datecreate DESC';
     $cdbNewsLocal->limit = 1;
     $cdbNewsLocal->condition = 'idmenu =' . $numHeadTab1;
     $modelNewsLocal = News::model()->find($cdbNewsLocal);
     if ($modelNewsLocal === NULL) {
         Yii::app()->user->setFlash('LocalEmpty', 'Dữ liệu đang cập nhật');
         $modelLocalMore = Yii::app()->user->setFlash('LocalEmptyMore', 'Dữ liệu đang cập nhật');
     } else {
         //lay 4 tin khac de hien thi phan tin tuc
         $cdbLocalMore = new CDbCriteria();
         $cdbLocalMore->limit = 4;
         $cdbLocalMore->order = 'datecreate DESC';
         $cdbLocalMore->condition = 'id NOT IN ("' . $modelNewsLocal->id . '") AND idmenu=' . $modelNewsLocal->idmenu;
         $modelLocalMore = News::model()->findAll($cdbLocalMore);
     }
     //lay 1 tin moi de hien thi phan Tin cong nghe
     $numHeadTab2 = $headTab->model()->find('alias="tin-cong-nghe"')->id;
     $cdbNewsTech = new CDbCriteria();
     $cdbNewsTech->order = 'datecreate DESC';
     $cdbNewsTech->limit = 1;
     $cdbNewsTech->condition = 'idmenu =' . $numHeadTab2;
     $modelNewsTech = News::model()->find($cdbNewsTech);
     if ($modelNewsTech === NULL) {
         Yii::app()->user->setFlash('emptyData', 'Dữ liệu đang cập nhật');
         $modelTechMore = Yii::app()->user->setFlash('emptyDataMore', 'Dữ liệu đang cập nhật');
     } else {
         //lay 2 tin khac de hien thi phan Tin cong nghe
         $cdbTechMore = new CDbCriteria();
         $cdbTechMore->limit = 2;
         $cdbTechMore->order = 'datecreate DESC';
         $cdbTechMore->condition = 'id NOT IN ("' . $modelNewsTech->id . '") AND idmenu=' . $modelNewsTech->idmenu;
         $modelTechMore = News::model()->findAll($cdbTechMore);
     }
     //lay 1 tin moi de hien thi phan Thong bao
     $numHeadTab3 = $headTab->model()->find('alias="thong-bao"')->id;
     $cdbNewsNotify = new CDbCriteria();
     $cdbNewsNotify->order = 'datecreate DESC';
     $cdbNewsNotify->limit = 1;
     $cdbNewsNotify->condition = 'idmenu =' . $numHeadTab3;
     $modelNewsNotify = News::model()->find($cdbNewsNotify);
     if ($modelNewsNotify === NULL) {
         Yii::app()->user->setFlash('NofifyEmpty', 'Dữ liệu đang cập nhật');
         $modelNotifyMore = Yii::app()->user->setFlash('MoreNofifyEmpty', 'Dữ liệu đang cập nhật');
     } else {
         //lay 2 tin khac de hien thi phan Tin cong nghe
         $cdbNotifyMore = new CDbCriteria();
         $cdbNotifyMore->limit = 2;
         $cdbNotifyMore->order = 'datecreate DESC';
         $cdbNotifyMore->condition = 'id NOT IN ("' . $modelNewsNotify->id . '") AND idmenu=' . $modelNewsNotify->idmenu;
         $modelNotifyMore = News::model()->findAll($cdbNotifyMore);
     }
     $this->render('index', array('modelNewsLocal' => $modelNewsLocal, 'modelLocalMore' => $modelLocalMore, 'modelNewsTech' => $modelNewsTech, 'modelTechMore' => $modelTechMore, 'modelNewsNotify' => $modelNewsNotify, 'modelNotifyMore' => $modelNotifyMore));
 }