add url

def add_url(self, endpoint):
        """Adds additional urls to the resource

        :endpoint: the end point API to be added
        :returns: the url created ( for tastypie )

        """
        api = r'(?P<resource_name>%s)/(?P<endpoint>%s)%s$' % (
            self._meta.resource_name, endpoint, trailing_slash())
        endpoint = endpoint.replace('/', '_')
        return url(api, self.wrap_view(endpoint), name='api_%s' % endpoint)