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PODjango error: TypeError: 'NoneType' object has no attribute '__getitem__'
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copied!<p>Using Django (new to it and new to Python in general) to do a very basic contacts database.</p> <p>Trying to add a record via the Admin pages to a Contributor table, the model code for which is:</p> <pre><code>class Contributor(models.Model): first_name = models.CharField(max_length=20) last_name = models.CharField(max_length=20) organisation = models.ForeignKey('Organisation') mode = models.CharField(max_length=10, blank=True) email = models.CharField(max_length=30, blank=True) landline = models.CharField(max_length=10, blank=True) def __unicode__(self): print('%s %s' % (self.first_name, self.last_name)) </code></pre> <p>The error message I am getting is:</p> <pre><code> Environment: Request Method: POST Request URL: http://127.0.0.1:8000/admin/ramapp/contributor/add/ Django Version: 1.5.5 Python Version: 2.7.5 Installed Applications: ('django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.staticfiles', 'django.contrib.admin', 'south', 'ramapp') 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 "/Users/lemon/.virtualenvs/ram/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response 115. response = callback(request, *callback_args, **callback_kwargs) File "/Users/lemon/.virtualenvs/ram/lib/python2.7/site-packages/django/contrib/admin/options.py" in wrapper 372. return self.admin_site.admin_view(view)(*args, **kwargs) File "/Users/lemon/.virtualenvs/ram/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view 91. response = view_func(request, *args, **kwargs) File "/Users/lemon/.virtualenvs/ram/lib/python2.7/site-packages/django/views/decorators/cache.py" in _wrapped_view_func 89. response = view_func(request, *args, **kwargs) File "/Users/lemon/.virtualenvs/ram/lib/python2.7/site-packages/django/contrib/admin/sites.py" in inner 202. return view(request, *args, **kwargs) File "/Users/lemon/.virtualenvs/ram/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapper 25. return bound_func(*args, **kwargs) File "/Users/lemon/.virtualenvs/ram/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view 91. response = view_func(request, *args, **kwargs) File "/Users/lemon/.virtualenvs/ram/lib/python2.7/site-packages/django/utils/decorators.py" in bound_func 21. return func(self, *args2, **kwargs2) File "/Users/lemon/.virtualenvs/ram/lib/python2.7/site-packages/django/db/transaction.py" in inner 223. return func(*args, **kwargs) File "/Users/lemon/.virtualenvs/ram/lib/python2.7/site-packages/django/contrib/admin/options.py" in add_view 1009. self.log_addition(request, new_object) File "/Users/lemon/.virtualenvs/ram/lib/python2.7/site-packages/django/contrib/admin/options.py" in log_addition 530. action_flag = ADDITION File "/Users/lemon/.virtualenvs/ram/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/ramapp/contributor/add/ Exception Value: 'NoneType' object has no attribute '__getitem__' </code></pre> <p>Grateful for any assistance. Struggling! Thanks.</p> <p>Matt</p>

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