尝试为Yii2设置DbManager。php版本有很多线程，但是DB版本的线程不多。
我所知道的：
步骤1:迁移脚本
./yii migrate --migrationPath=@yii/rbac/migrations/
步骤2：配置
...
'authManager' => [
'class' => 'yii'rbac'DbManager',
'defaultRoles' => ['admin', 'user', 'guest'],
],
...
步骤3：设置角色/规则
????
$auth = Yii::$app->authManager;
// add "createPost" permission
$createPost = $auth->createPermission('createPost');
$createPost->description = 'Create a post';
$auth->add($createPost);
// add "updatePost" permission
$updatePost = $auth->createPermission('updatePost');
$updatePost->description = 'Update post';
$auth->add($updatePost);
// add "author" role and give this role the "createPost" permission
$author = $auth->createRole('author');
$auth->add($author);
$auth->addChild($author, $createPost);
// add "admin" role and give this role the "updatePost" permission
// as well as the permissions of the "author" role
$admin = $auth->createRole('admin');
$auth->add($admin);
$auth->addChild($admin, $updatePost);
$auth->addChild($admin, $author);
// Assign roles to users. 1 and 2 are IDs returned by IdentityInterface::getId()
// usually implemented in your User model.
$auth->assign($author, 2);
$auth->assign($admin, 1);
http://www.yiiframework.com/doc-2.0/guide-security-authorization.html