Symfony: How do I refresh the authenticated user from the database?

Question

Say for example I grant a new role to the currently authenticated user in a controller, like so:

$em = $this->getDoctrine()->getManager();
$loggedInUser = $this->get('security.context')->getToken()->getUser();
$loggedInUser->addRole('ROLE_XYZ');

$em->persist($loggedInUser);
$em->flush();

On the next page load, when I grab the authenticated user again:

$loggedInUser = $this->get('security.context')->getToken()->getUser();

They are not granted the role. I am guessing this is because the user is stored in the session and needs to be refreshed.

How do I do this?

I am using FOSUserBundle if that makes a difference.

EDIT: This question was originally asked in the context of Symfony version 2.3 but there are answers for more recent versions below as well.

Answer 1

Try this:

$em = $this->getDoctrine()->getManager();
$loggedInUser = $this->get('security.context')->getToken()->getUser();
$loggedInUser->addRole('ROLE_XYZ');

$em->persist($loggedInUser);
$em->flush();

$token = new \Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken(
  $loggedInUser,
  null,
  'main',
  $loggedInUser->getRoles()
);

$this->container->get('security.context')->setToken($token);