找不到Symfony2注销控制器

Question

I have managed to get the login working in Symfony2, but I have trouble with /logout. I get an exception saying it can't find the controller for the route. However, I was under the impression that Symfony deals with the logout process, just like it deals with the login?

(part of) my security.yml file:

firewalls:
    login_firewall:
        pattern:    ^/login/
        anonymous:  ~
    secured_area:
        pattern:    ^/(dashboard|directories|login_check)/
        anonymous: ~
        form_login:
            login_path:  /login/
            check_path:  /login_check/
        logout:
            path:   /logout/
            target: /

My (relevant) routes:

_login:
    pattern: /login/
    defaults: { _controller: NanoBundle:Login:index } 

_login_check:
    pattern: /login_check/

_logout:
    pattern: /logout/

--edit: logout button code:

<a href="{{path('_logout')}}">Logout</a>

Answer 1

I eventually fixed it with this security.yml section:

    secured_area:
        pattern:    .*
        security: true
        form_login:
            login_path:  /login/
            check_path:  /login_check/
        logout:
            path: /logout/
            invalidate_session: true

thanks to everyone for trying to help out on this :)