Add roles in FOSUserBundle - symfony

Question

I feel the same as a forum user who posted this:
I implemented FOSUserBundle, and I want to add to RegisrationFormType roles that are taken from a table. When I had it like this:
->add('roles', 'choice', array('label' => 'Rol', 'required' => true,
'choices' => array( 'ROLE_ADMIN' => 'ADMINISTRADOR','ROLE_SUPERADMIN' => 'SUPERADMINISTRADOR',
'ROLE_USER' => 'USUARIO'), 'multiple' => true))
And it works! But they must leave the BD, I can not put the Entity field because roles should be an array, not an object. How I can generate the array with the roles taken from a table? In FosUSerbundle as you would add roles?
Thanks ....
I write because that user had no answer. I followed [the steps of official documentation] (https://github.com/FriendsOfSymfony/FOSUserBundle/blob/master/Resources/doc/index.md) and adding the above lines in the register of FOSUserBundle works, but I want to work this from the database.
And then I used to create groups this. Two additional tables were created and even now joined a group or role in the list, but not how to show the login to register a new user.
Has anyone solved it?

Answer 1

So you have the roles in a table? You could inject the EntityManager in the form type and use it to fetch the choices.
->add('roles', 'choice', array(
'label' => 'Rol',
'choices' => $this->getRoles(),
'multiple' => true,
'required' => true,
))
Then create a method which gives you the data the way you need.
Something like:
public function getRoles()
{
$roles = array();
$er = $this->em->getRepository('AppBundle:Role');
$results = $er->createQueryBuilder('r')
// conditions here
->getQuery()
->getResult();
// process the array?
foreach ($results as $role) {
$roles[$role->getId()] = $role->getLabel();
}
return $roles;
}