UrlResolver doesn't check all possibilities

[Adrien mille]

The UrlResolver doesn't check possibilities through multiple namespaces ; It'll look out for the viewname in a namespace to test all possibilities. But the resolver won't go backward to other namespaces to list additional possibilities that might match. I've few difficulties to define that issue so I join this test case to reproduce it.

from django.test import TestCase
from django.conf.urls import url, include
from django.shortcuts import reverse


def my_view(**kwargs):
    pass


class UrlConf(object):
    # those are url patterns and views that I can re-used multiple times
    common_url_patterns = [
        # this is a page like any others
        url(r'^$', my_view, name='page'),
        # here is a namespace to let's say group actions together
        # I clearly set a namespace to make it more logical
        url(r'^actions/', include([
            url(r'^action/$', my_view, name='action')
        ], namespace='actions'))
    ]

    urlpatterns = [
        # this is a part of my app into a namespace, nothing special about it
        url(r'^root/', include([
            # depending of what are my keyword arguments
            # I will use one of these two followings possibilities
            url(r'^without-context/', include(common_url_patterns), kwargs={'additional_arg': -21}),
            url(r'^with-context/(?P<var>[0-9]+)/', include(common_url_patterns))
            # you may ask why I'm not using nested optional argument
            # this is because I explicitly defined kwargs arguments for my view in one cases
            # but not in the other, so I cannot solve it that way
        ], namespace='root'))
    ]


class TestUrlResolver(TestCase):
    def _test_reverse_for(self, viewname, kwargs, expected):
        self.assertEqual(reverse(viewname, kwargs=kwargs, urlconf=UrlConf), expected)

    def test_page_without_var(self):
        self._test_reverse_for('root:page', None, '/root/without-context/')

    def test_page_with_var(self):
        self._test_reverse_for('root:page', {'var': 42}, '/root/with-context/42/')

    def test_action_without_var(self):
        self._test_reverse_for('root:actions:action', None, '/root/without-context/actions/action/')

    def test_action_with_var(self):
        self._test_reverse_for('root:actions:action', {'var': 42}, '/root/with-context/42/actions/action/')