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Upgrading Instructions for Yii Framework v2
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===========================================
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!!!IMPORTANT!!!
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The following upgrading instructions are cumulative. That is,
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if you want to upgrade from version A to version C and there is
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version B between A and C, you need to following the instructions
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for both A and B.
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Upgrade from Yii 2.0 Beta
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-------------------------
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* If you used `clearAll()` or `clearAllAssignments()` of `yii\rbac\DbManager`, you should replace
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them with `removeAll()` and `removeAllAssignments()` respectively.
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* If you created RBAC rule classes, you should modify their `execute()` method by adding `$user`
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as the first parameter: `execute($user, $item, $params)`. The `$user` parameter represents
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the ID of the user currently being access checked. Previously, this is passed via `$params['user']`.
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* If you override `yii\grid\DataColumn::getDataCellValue()` with visibility `protected` you have
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to change visibility to `public` as visibility of the base method has changed.
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* If you have classes implementing `yii\web\IdentityInterface` (very common), you should modify
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the signature of `findIdentityByAccessToken()` as
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`public static function findIdentityByAccessToken($token, $type = null)`. The new `$type` parameter
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will contain the type information about the access token. For example, if you use
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`yii\filters\auth\HttpBearerAuth` authentication method, the value of this parameter will be
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`yii\filters\auth\HttpBearerAuth`. This allows you to differentiate access tokens taken by
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different authentication methods.
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