public function actionCreate()
    {
        $model = new Banner();
        $model->time = date("Y-m-d H:i:s");
        $model->position = $model->getLast();
        $model->isdel = 0;
		
		$post = Yii::$app->request->post();
		if (isset($post['Banner']['tags']))
		{
			if (is_array($post['Banner']['tags']))
			{
				$post['Banner']['tags'] = implode(",",$post['Banner']['tags']);
			}	
		}
		
		$transaction = Yii::$app->db->beginTransaction();
		try {				
			if ($model->load($post) && $model->save()) {
				$model->updatePosition($model->position);
				$transaction->commit();
				return $this->redirect(['view', 'id' => $model->id]);
			}					
			else
			{
				$transaction->rollBack();	
			}
		} catch (Exception $e) {
			$transaction->rollBack();
		}
		
		return $this->render('create', [
			'model' => $model,
		]);
	
    }