Flash-Messages in Symfony2 doesn't seem to work in my twig-template

Question

I want to add support for flash messages on our pages. I implemented this by following the documentation found here.

I added the following snipplet to my base layou

Answer 1

Did you set the flash message somewhere in your action?

$this->get('session')->setFlash('notice', 'Your changes were saved!');

Remember that flash messages will be stored on the user's session for exactly one additional request.