I worked it out in the end - I had two formsets in the same form, and
hadn't realised the need for the prefix option to separate them.
2009/7/10 Karen Tracey <kmtra...@gmail.com>:
> On Thu, Jul 9, 2009 at 12:01 PM, Michael Stevens <mpsteven...@gmail.com>
> wrote:
>>
>> Hi.
>>
>> I'm trying to use a model formset.
>>
>> I've successfully got it rendering data from the database and showing
>> it on a form to edit, but I'm now trying to recreate the data in save.
>>
>> So I've got:
>> FooFormset = modelformset_factory(Foo exclude = ['id', 'foo'])
>> foo_formset = FooFormset(request.POST, request.FILES,
>> queryset=Foo.objects.filter(...))
>>
>> Without the "request.POST", it works, with the request.POST I get:
>>
>> Environment:
>>
>> Request Method: POST
>> Request URL: ...
>> Django Version: 1.0.2 final
>> Python Version: 2.3.4
>> Installed Applications:
>> [...)
>> Installed Middleware:
>> ('django.middleware.common.CommonMiddleware',
>> 'django.contrib.sessions.middleware.SessionMiddleware',
>> 'django.contrib.auth.middleware.AuthenticationMiddleware')
>>
>>
>> Traceback:
>> File "/opt/dev/python/modules/django/core/handlers/base.py" in
>> get_response
>> 86. response = callback(request, *callback_args,
>> **callback_kwargs)
>> File "/opt/dev/python/django/.../manager/views.py" in smartad_edit
>> 39. foo_formset = FooFormSet(request.POST, request.FILES,
>> queryset=Foo.objects.filter(...))
>> File "/opt/dev/python/modules/django/forms/models.py" in __init__
>> 352. super(BaseModelFormSet, self).__init__(**defaults)
>> File "/opt/dev/python/modules/django/forms/formsets.py" in __init__
>> 67. self._construct_forms()
>> File "/opt/dev/python/modules/django/forms/formsets.py" in
>> _construct_forms
>> 76. self.forms.append(self._construct_form(i))
>> File "/opt/dev/python/modules/django/forms/models.py" in _construct_form
>> 356. kwargs['instance'] = self.get_queryset()[i]
>> File "/opt/dev/python/modules/django/db/models/query.py" in __getitem__
>> 221. return self._result_cache[k]
>>
>> Exception Type: IndexError at /...
>> Exception Value: list index out of range
>>
>> I've censored the stack trace a little to remove anything too sensitive.
>>
>> What am I doing wrong?
>
> Are you passing the same queryset in when you create the form for POST as
> you did for GET? Without actually looking at the code I think what is
> happening here is you have data for more items in the POST dictionary than
> you have in your passed queryset.
>
> Karen
>
> >
>
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