public function actionPercent()
 {
     $model = Percent::model()->find(array('order' => 't.percent_date DESC'));
     if ($_POST['percent']) {
         $transaction = Yii::app()->db->beginTransaction();
         try {
             $messageType = 'warning';
             $message = "There are some errors ";
             $model = new Percent();
             $model->percent_date = date('Y-m-d H:i:s');
             $model->percent = $_POST['percent'];
             if ($model->save()) {
                 $transaction->commit();
                 Yii::app()->user->setFlash($messageType, $message);
                 $this->redirect(array('site/index'));
             }
         } catch (Exception $e) {
             $transaction->rollBack();
             Yii::app()->user->setFlash('error', "{$e->getMessage()}");
             //$this->refresh();
         }
     }
     $this->render('percent', array('model' => $model));
 }