On Thu, Mar 4, 2010 at 9:54 PM, eXt <restless.be...@gmail.com> wrote:
> Hi!
>
>   I've upgraded my Django to 1.2 (1.2-beta-1, tried also trunk) and
> after that my application has started to throw an exception:
> ValueError: Cannot add "<User: XXX>": instance is on database
> "default", value is is on database "None".
>
> The code causing the problem is:
>
> (...)
> project = form.save()
> admin_profiles =
> Member.objects.select_related().filter(group__name='Admin')
> for admin_profile in admin_profiles:
>    project.users.add(admin_profile.user)
>
> It is just adding users to a project.users which is m2m to auth.User.
> Error report is:
>
> Traceback (most recent call last):
>
>  File "/var/www/django/someapp/parts/django/django/core/handlers/
> base.py", line 101, in get_response
>   response = callback(request, *callback_args, **callback_kwargs)
>
>  File "/var/www/django/someapp/webshare/utils.py", line 21, in wrapper
>   context = view_func(*args, **kwargs)
>
>  File "/var/www/django/someapp/webshare/apps/projects/views.py", line
> 100, in add_project
>   project.users.add(admin_profile.user)
>
>  File "/var/www/django/someapp/parts/django/django/db/models/fields/
> related.py", line 465, in add
>   self._add_items(self.source_field_name, self.target_field_name,
> *objs)
>
>  File "/var/www/django/someapp/parts/django/django/db/models/fields/
> related.py", line 525, in _add_items
>   (obj, self.instance._state.db, obj._state.db))
>
> ValueError: Cannot add "<User: XXX>": instance is on database
> "default", value is is on database "None"
>
>
> Everything is ok when I go back to Django 1.1.1. Is there something
> I've missed in my configuration or it's a bug?

Sounds like an edge case that has been missed to me. This error
message that is being reported shouldn't be an problem - the value
should be assignable to default.

Please open a ticket, and assign it to the 1.2 milestone.

Yours,
Russ Magee %-)

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