Adding URI to TastyPie resource

models.py

class NotebookResource(BackboneJSResource):
    user = fields.ForeignKey(UserResource, 'user')

    class Meta:
        queryset = Notebook.objects.all()

        authentication = MULTI_AUTH
        authorization = OwnerAuthorization()

        # allow to list posts for this notebook
        posts_allowed_methods = ['get', 'post']

        filtering = {'id': ALL}

    def get_posts(self, request, **kwargs):
        kwargs['notebook__id'] = kwargs['pk']
        return PostResource().get_list(request, **kwargs)

    def post_posts(self, request, **kwargs):
        """
        Creates a new post
        """
        kwargs['notebook'] = Notebook.objects.get(pk=kwargs.pop('pk'))
        return PostResource().post_list(request, **kwargs)

    def dispatch_posts(self, request, **kwargs):
        """
        A view for handling the various HTTP methods (GET/POST/PUT/DELETE) on
        a single resource.

        Relies on ``Resource.dispatch`` for the heavy-lifting.
        """
        return self.dispatch('posts', request, **kwargs)

    def override_urls(self):
        return [
            url(r"^(?P<resource_name>%s)/(?P<pk>\w[\w/-]*)/posts%s$" % (self._meta.resource_name, trailing_slash()), self.wrap_view('dispatch_posts'), name="api_dispatch_list_posts"),
            ]