#25880: Forms created by formset_factory's extra parameter don't have instance
set
----------------------------+--------------------
Reporter: karyon | Owner: nobody
Type: Bug | Status: new
Component: Forms | Version: 1.8
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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i have code of the following form:
{{{
Model A:
pass
Model B:
related_field = ForeignKey(A)
class BForm(ModelForm):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
print(self.instance.related_field)
def some_view(request):
InlineBFormset = inlineformset_factory(A, B, formset=ABFormset,
form=BForm, extra=1)
formset = InlineBFormset(request.POST or None,
instance=some_a_instance)
}}}
the line with the print crashes for the form created by the extra=1 with
RelatedObjectDoesNotExist: B has no A. i would have expected that the
some_a_instance is set on the form's self.instance.
in django 1.9, i can easily work around that by handing over constructor
parameters, but it would still seem weird to me to hand over the related
instance that would later be set by the formset's save method anyways.
i can provide the real code if needed.
--
Ticket URL: <https://code.djangoproject.com/ticket/25880>
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