Django NoReverseMatch

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Question :

Django NoReverseMatch

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

from django.conf.urls import patterns, include, url
from django.contrib import admin
import login


urlpatterns = patterns('',
    url(r'^$', include('login.urls', namespace='login')),
    url(r'^admin/', include(,

And this is login/

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"
            msg = "The password is valid, but the account has been disabled!"
        # 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.

Asked By: freakrho


Answer #1:

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 $.

Answered By: Daniel Roseman

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