title: reverse() argument after ** must be a mapping
body: <p>I have an inscription form that doesnt work when submitting</p>
  
  <p>I get this error : </p>
  
  <p><strong>reverse() argument after ** must be a mapping, not str</strong></p>
  
  <p>This is my view : </p>
  
  <pre><code>def inscription(request, seance_id):
      seance = get_object_or_404(Variant, id=seance_id)
      inscription_config = {'form_class': InscriptionForm,
                            'extra_context': {'seance': seance}}    
  
      return create_object(request, **inscription_config)
  </code></pre>
  
  <p>My form :</p>
  
  <pre><code>class InscriptionForm(forms.ModelForm):
      class Meta:
          model = Inscription
  
      def clean(self):
          cleaned_data = self.cleaned_data
          email = cleaned_data.get("mail")
          mail_confirmation = cleaned_data.get("mail_confirmation")
  
          if email != mail_confirmation:
              raise forms.ValidationError("Les deux adresses mails doivent correspondre")
  
          return cleaned_data
  </code></pre>
  
  <p>Seems what triggering the error is <strong>**inscription_config</strong> in the return statement</p>
  
  <p>But I have no idea why, and I've been looking since yesterday</p>
  
  <p><strong>EDIT</strong></p>
  
  <pre><code>Environment:
  
  Request Method: POST
  Request URL: http://127.0.0.1:8039/formations/inscription/1/
  Django Version: 1.2.5
  Python Version: 2.7.2
  Installed Applications:
  ['django.contrib.auth',
   'django.contrib.comments',
   'django.contrib.contenttypes',
   'django.contrib.sessions',
   'django.contrib.sites',
   'django.contrib.messages',
   'django.contrib.admin',
   'ckeditor',
   'constance',
   'constance.backends.database',
   'custom_flatpages',
   'django_extensions',
   'django_mobile',
   'django_xmlrpc',
   'easy_thumbnails',
   'gestion_formations',
   'file_uploader',
   'less',
   'mptt',
   'contact',
   'newsletter',
   'pagination',
   'south',
   'sentry',
   'sentry.client',
   'indexer',
   'paging',
   'contentadmin',
   'gallerie']
  Installed Middleware:
  ('annoying.middlewares.StaticServe',
   'django.middleware.common.CommonMiddleware',
   'django.contrib.sessions.middleware.SessionMiddleware',
   'django.middleware.csrf.CsrfViewMiddleware',
   'django.contrib.auth.middleware.AuthenticationMiddleware',
   'django.contrib.messages.middleware.MessageMiddleware',
   'pagination.middleware.PaginationMiddleware')
  
  
  
  Traceback:
  
  File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
    100.                     response = callback(request, *callback_args, **callback_kwargs)
  File "/home/anass/projects/c139_fc_finance/fc_finance/gestion_formations/views/carts.py" in inscription
    24.                          form_class= InscriptionForm 
  File "/usr/local/lib/python2.7/dist-packages/django/views/generic/create_update.py" in create_object
    118.             return redirect(post_save_redirect, new_object)
  File "/usr/local/lib/python2.7/dist-packages/django/views/generic/create_update.py" in redirect
    65.         return HttpResponseRedirect(obj.get_absolute_url())
  File "/usr/local/lib/python2.7/dist-packages/django/utils/functional.py" in _curried
    55.         return _curried_func(*(args+moreargs), **dict(kwargs, **morekwargs))
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in get_absolute_url
    969.     return settings.ABSOLUTE_URL_OVERRIDES.get('%s.%s' % (opts.app_label, opts.module_name), func)(self, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/__init__.py" in inner
    32.         return reverse(bits[0], None, *bits[1:3])
  File "/usr/local/lib/python2.7/dist-packages/django/core/urlresolvers.py" in reverse
    351.             *args, **kwargs)))
  
  Exception Type: TypeError at /formations/inscription/1/
  Exception Value: reverse() argument after ** must be a mapping, not str
  </code></pre>