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Fixed #27975 -- Fixed crash if ModelChoiceField's queryset=None. 

Regression in 9153d8fbd6385db9f48793662de789fc3d686841.
This commit is contained in:
James Beith 2017-03-22 16:38:16 +11:00 committed by Tim Graham
parent 325db2a8c3
commit 216bb2e8fb
2 changed files with 13 additions and 1 deletions
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3
django/forms/models.py
View File

@ -1155,7 +1155,8 @@ class ModelChoiceField(ChoiceField):
def __deepcopy__(self, memo):
result = super(ChoiceField, self).__deepcopy__(memo)
# Need to force a new ModelChoiceIterator to be created, bug #11183
result.queryset = self.queryset.all()
if self.queryset is not None:
result.queryset = self.queryset.all()
return result
def _get_queryset(self):

11
tests/model_forms/tests.py
View File

@ -1640,6 +1640,17 @@ class ModelChoiceFieldTests(TestCase):
form2 = ModelChoiceForm()
self.assertIsNone(form2.fields['category'].queryset._result_cache)
def test_modelchoicefield_queryset_none(self):
class ModelChoiceForm(forms.Form):
category = forms.ModelChoiceField(queryset=None)
def __init__(self, *args, **kwargs):
super(ModelChoiceForm, self).__init__(*args, **kwargs)
self.fields['category'].queryset = Category.objects.filter(slug__contains='test')
form = ModelChoiceForm()
self.assertCountEqual(form.fields['category'].queryset, [self.c2, self.c3])
def test_modelchoicefield_22745(self):
"""
#22745 -- Make sure that ModelChoiceField with RadioSelect widget