symfony - Symfony2 how to allow slug with dashes in routes regex?

Question

My route (slug contains dashes!):

region:
  pattern: /regione/{slug}-{id}
  defaults: { _controller: SWAItaliaInCifreBundle:Default:region }

In Twig template:

{% for r in regions %}
    <a href='{{ path('region', { 'slug':r.slug, 'id':r.id }) }}'>{{ r.name }}</a>
{% endfor %}

I'm getting an error about regular expression matching. Question: why Symfony2 does not permit dashes in url? How can i specify that my route contains dashes (and it's perfectly fine)?

An exception has been thrown during the rendering of a template ("Parameter "slug" for route "region" must match "[^/-]+?" ("valle-d-aosta-vallee-d-aoste" given).")

Answer 1

Slashes are by default forbidden. You can enable them by changing the default requirements. In your case it'd be also good to give requirements for the id as it's separated with dash.

See example below.

region:
    pattern: /regione/{slug}-{id}
    defaults:
        _controller: SWAItaliaInCifreBundle:Default:region
    requirements:
        slug: "[a-zA-Z1-9-_/]+"
        id: "d+"