URL namespacing warning (urls.W005) does not consider nested URL namespaces

[Chris Lamb]

The URL namespacing warning (urls.W005) does not consider nested URL namespaces. For example, if your root namespace includes two different urlconfs via namespace="foo" and namespace="bar" but each of these urlconfs includes another distinct urlconf but with the same namespace argument (eg. namespace="baz"), then you get:

(urls.W005) URL namespace 'baz' isn't unique. You may not be able to reverse all URLs in this namespace

This doesn't seem right as "foo:baz:view-a" and "bar:baz:view-b" are entirely independent.

I am seeing this a bit as I typically separate the user and admin parts of an app using nested apps and simply use "admin" as the "baz" in the above examples to avoid DRY in the fully-qualified urls.

[Chris Lamb]

​PR

(No tests yet.)

[Chris Lamb]

​PR updated with tests

[Tim Graham <timograham@…>]

In 8d4885ed:

Fixed #27874 -- Fixed URL namespace warning (urls.W005) for nested namespaces.

[Tim Graham <timograham@…>]

In 0417bf47:

[1.11.x] Fixed #27874 -- Fixed URL namespace warning (urls.W005) for nested namespaces.

Backport of 8d4885ede578b5beef7626cd31bbd19a95bd678a from master