Upgrading Instructions for Yii Framework v2===========================================!!!IMPORTANT!!!The following upgrading instructions are cumulative. That is,if you want to upgrade from version A to version C and there isversion B between A and C, you need to following the instructionsfor both A and B.
Upgrade from Yii 2.0 Beta-------------------------* If you used `clearAll()` or `clearAllAssignments()` of `yii\rbac\DbManager`, you should replace them with `removeAll()` and `removeAllAssignments()` respectively.
* If you created RBAC rule classes, you should modify their `execute()` method by adding `$user` as the first parameter: `execute($user, $item, $params)`. The `$user` parameter represents the ID of the user currently being access checked. Previously, this is passed via `$params['user']`.
* If you override `yii\grid\DataColumn::getDataCellValue()` with visibility `protected` you have to change visibility to `public` as visibility of the base method has changed.