All Generic Views are loosing args when you pass args and kwargs into urlpattern

[Adrian]

When I have in my urlpatterns args and kwargs the ListView is loosing args (it's returning empty tuple)

url(r"^(\w+)/test1/(?P<pk>[0-9]+)/list/$", SamplesListView.as_view(), name='list_view'),

Simple code for my view:

class SamplesListView(ListView):
    model = Sample
    template_name = 'samples/samples_list.html'

    def get(self, request, project_name, *args, **kwargs):
        print("project_name", project_name)
        return super().get(self, request, project_name, *args, **kwargs)

It works ok when I pass only args or kwargs into url.

THE PROBLEM occurs in ALL generic view (CreateView, UpdateView, DeleteVIew, ListView)

[Tim Graham]

Based on the documentation, I'm not sure if this is a bug. There's ​a note that says, "Here’s the algorithm the URLconf parser follows, with respect to named groups vs. non-named groups in a regular expression: If there are any named arguments, it will use those, ignoring non-named arguments." which seems to be what's happening here. The behavior isn't specific to generic views. If you use a function-based view, you'll see the same thing.

I'm not sure the reason for that behavior and if changing it is feasible, but it does seem unintuitive. On the other hand, is there a reason you must mix args and kwargs in the URL pattern? Do you want to look into writing a patch?