Using CActiveRecord->updateAll() and CActiveRecord->deleteAll() with scopes and criteria requires some tricks that are explained in this article. While findAll() , find() and some other methods use scopes automatically, updateAll() and deleteAll() do not.
I have read http://www.yiiframework.com/wiki/24/creating-a-dependent-dropdown/ (Dependen Dropdown Yii1), but I can't implement it in Yii2 because Yii2 does not have built-in AJAX functionality hem.. I searched about it and came across this post
Are you using the Bootstrap 3 form styles with Yii 2 Active Forms? Have you faced problems in displaying complex layouts which needs you to display multiple inline form fields in a single row, within bootstrap horizontal forms. Then read on.
Once you have installed and configured the rights extension in your application, you can change the table name from 'User' to any table name you want and similarly for 'username' column to any other column name.