'NoneType' object has no attribute '__getitem__' Please help me to debug this

[Ham Kibz]

Below is the traceback

Django Version: 1.5.1
Python Version: 2.7.4
Installed Applications:
('django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.admin',
 'products')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware')


Traceback:
File "/home/kelcy/django1.5.1/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  115.                         response = callback(request, *callback_args, **callback_kwargs)
File "/home/kelcy/django1.5.1/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in wrapper
  372.                 return self.admin_site.admin_view(view)(*args, **kwargs)
File "/home/kelcy/django1.5.1/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view
  91.                     response = view_func(request, *args, **kwargs)
File "/home/kelcy/django1.5.1/local/lib/python2.7/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  89.         response = view_func(request, *args, **kwargs)
File "/home/kelcy/django1.5.1/local/lib/python2.7/site-packages/django/contrib/admin/sites.py" in inner
  202.             return view(request, *args, **kwargs)
File "/home/kelcy/django1.5.1/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapper
  25.             return bound_func(*args, **kwargs)
File "/home/kelcy/django1.5.1/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view
  91.                     response = view_func(request, *args, **kwargs)
File "/home/kelcy/django1.5.1/local/lib/python2.7/site-packages/django/utils/decorators.py" in bound_func
  21.                 return func(self, *args2, **kwargs2)
File "/home/kelcy/django1.5.1/local/lib/python2.7/site-packages/django/db/transaction.py" in inner
  223.                 return func(*args, **kwargs)
File "/home/kelcy/django1.5.1/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in add_view
  1009.                 self.log_addition(request, new_object)
File "/home/kelcy/django1.5.1/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in log_addition
  530.             action_flag     = ADDITION
File "/home/kelcy/django1.5.1/local/lib/python2.7/site-packages/django/contrib/admin/models.py" in log_action
  18.         e = self.model(None, None, user_id, content_type_id, smart_text(object_id), object_repr[:200], action_flag, change_message)

Exception Type: TypeError at /admin/products/catalogcategory/add/
Exception Value: 'NoneType' object has no attribute '__getitem__'

[James Turley]

Hi Ham, I was following your thread on the LinkedIn django group and it looked there like you had a couple of simple typos in your CatalogCategory model's __unicode__ method. Did you get round to fixing those?

JT

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