Django NoReverseMatch
Question: I'm making a simple login app in django 1.6 (and python 2.7) and I get an
error at the beggining that is not letting me continue.

This is the site's url.py

    
    
    from django.conf.urls import patterns, include, url
    from django.contrib import admin
    import login
    
    admin.autodiscover()
    
    urlpatterns = patterns('',
        url(r'^$', include('login.urls', namespace='login')),
        url(r'^admin/', include(admin.site.urls)),
    )
    

And this is login/urls.py:

    
    
    from django.conf.urls import patterns, url
    from login import views
    
    urlpatterns = patterns('',
        url(r'^$', views.index, name='index'),
        url(r'^auth/', views.auth, name='auth'),
    )
    

This is login/views,py

    
    
    from django.shortcuts import render
    from django.contrib.auth import authenticate
    
    def auth(request):
        user = authenticate(username=request.POST['username'], password=request.POST['password'])
        if user is not None:
            # the password verified for the user
            if user.is_active:
                msg = "User is valid, active and authenticated"
            else:
                msg = "The password is valid, but the account has been disabled!"
        else:
            # the authentication system was unable to verify the username and password
            msg = "The username and password were incorrect."
        return render(request, 'login/authenticate.html', {'MESSAGE': msg})
    
    def index(request):
        return render(request, 'login/login_form.html')
    

I have a form that has this as action:

    
    
    {% url 'login:auth' %}
    

And that's where the problem is, when I try to load the page, I get:

    
    
    Reverse for 'auth' with arguments '()' and keyword arguments '{}' not found. 1 pattern(s) tried: [u'$auth/']
    

But if I set the url pattern to

    
    
    url(r'', views.auth, name='auth')
    

it works fine, only it sets the action as '/'.

I've been looking all around for an answer and I don't understand why it
doesn't work.

I tried changing the login url pattern to url(r'^login/$',
include('login.urls', namespace='login')), and it didn't change anything.


Answer: The problem is in the way you include the auth URLs in the main one. Because
you use both ^ and $, only the empty string matches. Drop the $.

