NoReverseMatch error on redirect

[Brad Rice]

I have a mulit-page form I am building. I get the start page to enter the data for the application, validate and save. When I try using reverse to move to the next page I get this error:

NoReverseMatch at /requestform/start/Reverse for 'registrant_add' with arguments '()' and keyword arguments '{'app_id': 11}' not found.

I have this url in my urls.py

url(r'^step1/(?P<app_id>\d+)/$, RegistrantCreate.as_view(), name="registrant_add"),

I am trying to call the view this way:

class ApplicationCreate(CreateView):

    model = Application

    form_class = ApplicationForm

    slug_field = 'created_by'

    template_name = 'requestform/start_form.html'

    @method_decorator(login_required)

    def dispatch(self, *args, **kwargs):

        return super(ApplicationCreate, self).dispatch(*args, **kwargs)

    def form_valid(self, form):

        obj = form.save(commit=False)

        obj.created_by = self.request.user

        obj.created = datetime.datetime.today()

        obj.modified = datetime.datetime.today()

        obj.save()

        return HttpResponseRedirect(reverse('registrant_add', kwargs={'app_id': obj.id}))

Why doesn't django recognize the named url 'registrant_add' and redirect to it?

[Brad Rice]

I figured it out. I had a namespaced url so it needed:

return HttpResponseRedirect(reverse('requestform:registrant_add', kwargs={'app_id': obj.id}))