求具体如何步骤

补充一个我碰到的问题，给可能需要人参考：

使用basic模板创建app时，必须要在config/console.php中设置authManager使用rbac:

    'components' => [
        'db' => $db,
        'authManager' => [
            'class' => 'yii\rbac\DbManager',
        ],
    ],

否则，执行yii migrate的时候会报InvalidConfigException异常:

[jason@kali:/var/www/learn/basic]$ ./yii migrate --migrationPath=@yii/rbac/migrations
Yii Migration Tool (based on Yii v2.0.6)

Total 1 new migration to be applied:
	m140506_102106_rbac_init

Apply the above migration? (yes|no) [no]:yes
*** applying m140506_102106_rbac_init
NULL
Exception 'yii\base\InvalidConfigException' with message 'You should configure "authManager" component to use database before executing this migration.'

in /var/www/learn/basic/vendor/yiisoft/yii2/rbac/migrations/m140506_102106_rbac_init.php:29

Stack trace:
#0 /var/www/learn/basic/vendor/yiisoft/yii2/rbac/migrations/m140506_102106_rbac_init.php(36): m140506_102106_rbac_init->getAuthManager()
#1 /var/www/learn/basic/vendor/yiisoft/yii2/console/controllers/BaseMigrateController.php(492): m140506_102106_rbac_init->up()
#2 /var/www/learn/basic/vendor/yiisoft/yii2/console/controllers/BaseMigrateController.php(129): yii\console\controllers\BaseMigrateController->migrateUp('m140506_102106_...')
#3 [internal function]: yii\console\controllers\BaseMigrateController->actionUp(0)
#4 /var/www/learn/basic/vendor/yiisoft/yii2/base/InlineAction.php(55): call_user_func_array(Array, Array)
#5 /var/www/learn/basic/vendor/yiisoft/yii2/base/Controller.php(151): yii\base\InlineAction->runWithParams(Array)
#6 /var/www/learn/basic/vendor/yiisoft/yii2/console/Controller.php(91): yii\base\Controller->runAction('', Array)
#7 /var/www/learn/basic/vendor/yiisoft/yii2/base/Module.php(455): yii\console\Controller->runAction('', Array)
#8 /var/www/learn/basic/vendor/yiisoft/yii2/console/Application.php(167): yii\base\Module->runAction('migrate', Array)
#9 /var/www/learn/basic/vendor/yiisoft/yii2/console/Application.php(143): yii\console\Application->runAction('migrate', Array)
#10 /var/www/learn/basic/vendor/yiisoft/yii2/base/Application.php(375): yii\console\Application->handleRequest(Object(yii\console\Request))
#11 /var/www/learn/basic/yii(19): yii\base\Application->run()
#12 {main}

注意：上面*** applying m140506_102106_rbac_init下面这行打印出来的NULL，是因为我调试过程中修改了代码，在第28行添加了输出:

[jason@kali:/var/www/learn/basic]$ grep -n var_dump -C3 /var/www/learn/basic/vendor/yiisoft/yii2/rbac/migrations/m140506_102106_rbac_init.php 
25-    {
26-        $authManager = Yii::$app->getAuthManager();
27-        if (!$authManager instanceof DbManager) {
28:            var_dump($authManager);
29-            throw new InvalidConfigException('You should configure "authManager" component to use database before executing this migration.');
30-        }
31-        return $authManager;

咋能默认选中呢