问如何在auth_assignment Rbac中更新Yii2表中的赋值？

EN

public function afterSave($isInsert, $changedOldAttributes)
{

    // Update the user role in the RBAC layer
    // Purge the user tokens when the password is changed
    if (array_key_exists('role', $changedOldAttributes)) {

        $auth = Yii::$app->authManager;

        $auth->revokeAll($this->id );

        $role = $auth->getRole($this->role);

        $auth->assign($role, $this->id);
    }
        return parent::afterSave($isInsert, $changedOldAttributes);
    }