Flash-Messages in Symfony2 doesn't seem to work in my twig-template
do you use symfony 2.0 or 2.1 (currently master branch)?
for symfony 2.1 the documentation is located here: http://symfony.com/doc/2.1/book/controller.html#flash-messages
flash messages are shown like this:
{% for flashMessage in app.session.flashbag.get('notice') %} <div class="flash-notice"> {{ flashMessage }} </div>{% endfor %}
Mmm check in your config file that you have auto-started the session:
session: default_locale: %locale% auto_start: trueBecause the error seems to be that Twig doesn't find the session class, not something about the hasFlash function. In fact I have almost exactly the same code in my layout.
This is pretty old at time of writing so imagine you've worked it out by now, but for reference sake, it's has rather than hasFlash. So..
{% if app.session.flashbag.has('notice') %} <div id="flashmessage" class="flash-notice"> {{ app.session.flashbag.get('notice') }} </div> {% endif %}