#11872: can't pass instance=None to inline formset
--------------------+-------------------------------------------------------
Reporter: tobias | Owner: nobody
Status: new | Milestone: 1.2
Component: Forms | Version: 1.1
Keywords: | Stage: Unreviewed
Has_patch: 1 |
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If you try to pass instance=None to a new unbound formset you get an
exception:
{{{
Traceback (most recent call last):
File "/home/tobias/caktus/eclipse-workspace/django-
trunk/tests/regressiontests/model_formsets_regress/tests.py", line 152, in
test_formset_with_none_instance
form_set = FormSet(instance=None)
File "../django/forms/models.py", line 721, in __init__
backlink_value = getattr(self.instance, self.fk.rel.field_name)
AttributeError: 'UserSite' object has no attribute 'username'
}}}
because the formset is trying to instantiate the wrong type of model in
place of the None instance.
A quick one-line change fixes the problem. Attached is a patch with a
test demonstrating the problem and the proposed solution.
--
Ticket URL: <http://code.djangoproject.com/ticket/11872>
Django <http://code.djangoproject.com/>
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