Yii2 Rbac (DbManager)- return null - yii2

Question

Yii::$app->user->can('do_all') return null when i enter by my user (in db only 1 user).
What i did wrong.
1)- I created 4 tables.
auth_asignment: item_name => do_all, user_id => 1
auth_item: name => do_all, type => 1
auth_item_child: empty
auth_rule: empty
2)- I added in config/web.php
'components' => [
'authManager' => [
'class' => 'yii\rbac\DbManager',
'defaultRoles' => ['guest'],
]
]
3)- In controller i added
public function actionIndex()
{
if(Yii::$app->user->can('do_all')){
return $this->render('index');
}
else{
throw new ForbiddenHttpException('The requested page is not exist.');
}
}

Answer 1

I think you shuld add value in auth_item_child and organize the value this way
try adding a role ind this way
auth_item: name => do_all_role, type => 1
auth_item_child parent: do_all_role, child : do_all
auth_asignment: item_name => do_all_role, user_id => 1
and use (attention at the class name normally the User class name start with an Uppercase char)
Yii::$app->User->can('do_all');