ValueError: Too many values to unpack Django

Question

So I just got my first django app deployed.

I did a syncdb and created my superuser account for the site.

Now when I access the page and press the login button I get this error. I think it has something to do with the password but I'm not sure.

ValueError at /accounts/login/ too many values to unpack 

I'm using the generic login view

(r'^accounts/login/$', login, {'template_name': 'authentication/login.html'}), 

The following is the traceback

Environment:   Request Method: POST Request URL: http://xx.xx.xx.xx:8888/accounts/login/?next=/some_page/  Django Version: 1.3.1 Python Version: 2.7.2 Installed Applications: ['django.contrib.auth',  'django.contrib.contenttypes',  'django.contrib.sessions',  'django.contrib.sites',  'django.contrib.messages',  'django.contrib.staticfiles',  'django.contrib.admin',  'bc_system_app',  'django.contrib.humanize'] Installed Middleware: ('django.middleware.common.CommonMiddleware',  'django.contrib.sessions.middleware.SessionMiddleware',  'django.middleware.csrf.CsrfViewMiddleware',  'django.middleware.csrf.CsrfResponseMiddleware',  'django.contrib.auth.middleware.AuthenticationMiddleware',  'django.contrib.messages.middleware.MessageMiddleware')   Traceback: File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response   111.                         response = callback(request, *callback_args, **callback_kwargs) File "/usr/local/lib/python2.7/dist-packages/django/utils/decorators.py" in _wrapped_view   93.                     response = view_func(request, *args, **kwargs) File "/usr/local/lib/python2.7/dist-packages/django/views/decorators/cache.py" in _wrapped_view_func   79.         response = view_func(request, *args, **kwargs) File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/views.py" in login   35.         if form.is_valid(): File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in is_valid   121.         return self.is_bound and not bool(self.errors) File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in _get_errors   112.             self.full_clean() File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in full_clean   268.         self._clean_form() File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in _clean_form   296.             self.cleaned_data = self.clean() File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/forms.py" in clean   85.             self.user_cache = authenticate(username=username, password=password) File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/__init__.py" in authenticate   55.             user = backend.authenticate(**credentials) File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/backends.py" in authenticate   18.             if user.check_password(password): File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/models.py" in check_password   275.         return check_password(raw_password, self.password) File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/models.py" in check_password   42.     algo, salt, hsh = enc_password.split('$')  Exception Type: ValueError at /accounts/login/ Exception Value: too many values to unpack 

Answer 1

Just had the same problem.

It seem that in my case, the site was running with Django 1.4 when the password was created (due to a PYTHONPATH mix-up).

When I tried to login running the site with 1.3.1 I got this error. Then I noticed the Django version, switched to 1.4 and the login started working again.

It seems the password algorithm was changed in 1.4:

https://docs.djangoproject.com/en/dev/releases/1.4-beta-1/#improved-password-hashing

And if you were using Django 1.4 alpha it might also be that the password was effectively corrupted (read the warning).