I noticed a strange behavior with Django and filed a bug https://code.djangoproject.com/ticket/19271#ticket
It is suggested that I first check on the support group if the bug is valid or not. Fair Enough. I have created a standalone project to demonstrate the problem. In order to run it you may have to create a database and configure it in settings.py though. Code that does not work: https://github.com/iamrohitbanga/django_ticket_19271/tree/code_not_working Code that works: https://github.com/iamrohitbanga/django_ticket_19271/tree/code_working Just creating my_id field in BaseModel class with unique=True set causes the code to fail with the stack trace below. My usecase is a bit weird hence you would find model form inheriting from abstract models. IMHO that should not matter. The code works without unique fields but does not work with non-unique fields. I will be happy to provide more clarifications. Below is the stacktrace for the "AttributeError at /create_new type object 'BaseModel' has no attribute '_default_manager' 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 "django_bug_19271/testproj/testproj/views.py" in create_new 33. if form.is_valid(): File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in is_valid 124. return self.is_bound and not bool(self.errors) File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in _get_errors 115. self.full_clean() File "/usr/local/lib/python2.7/dist-packages/django/forms/forms.py" in full_clean 272. self._post_clean() File "/usr/local/lib/python2.7/dist-packages/django/forms/models.py" in _post_clean 338. self.validate_unique() File "/usr/local/lib/python2.7/dist-packages/django/forms/models.py" in validate_unique 347. self.instance.validate_unique(exclude=exclude) File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in validate_unique 633. errors = self._perform_unique_checks(unique_checks) File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in _perform_unique_checks 717. qs = model_class._default_manager.filter(**lookup_kwargs) Exception Type: AttributeError at /create_new Exception Value: type object 'BaseModel' has no attribute '_default_manager' Request information: GET: No GET data POST: csrfmiddlewaretoken = u'**********' my_id = u'1' name = u'Rohit' FILES: No FILES data COOKIES: csrftoken = '****' -- You received this message because you are subscribed to the Google Groups "Django users" group. To view this discussion on the web visit https://groups.google.com/d/msg/django-users/-/IpjAFDReTPwJ. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
