set role for users in edit form of sonata admin

Question

I'm using Symfony 2.1 for a project. I use the FOSUserBundle for managing users & SonataAdminBundle for administration usage.

I have some questions about that:

1. As an admin, I want to set roles from users in users edit form. How can I have access to roles in role_hierarchy? And how can I use them as choice fields so the admin can set roles to users?

2. When I show roles in a list, it is shown as string like this:

   [0 => ROLE_SUPER_ADMIN] [1 => ROLE_USER] 
   

   How can I change it to this?

   ROLE_SUPER_ADMIN, ROLE_USER 
   

   I mean, having just the value of the array.

Answer 1

i found an answer for my first question!(but the second one in not answered yet..) i add the roles like below in configureFormFields function :

  protected function configureFormFields(FormMapper $formMapper) {
  //..
 $formMapper
 ->add('roles','choice',array('choices'=>$this->getConfigurationPool()->getContainer()->getParameter('security.role_hierarchy.roles'),'multiple'=>true ));
}

I would be very happy if anyone answers the second question :)