[['post_id'], 'exist', 'skipOnError' => true, 'targetClass' => Post::className(), 'targetAttribute' => ['post_id' => 'id']],
];
}

```
y
 
 
You can add extension or any skiponempty method also in model. And this is my controller action where I performed multiple file uploading code.
 
 

```php
public function actionMultiple(){```


 
If any query or question I will respond.