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Refs #28312 -- Added an optimized __bool__() to ModelChoiceIterator.

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COUNT is more expensive than EXISTS; use the latter when possible.
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François Freitag 2018-04-13 18:39:10 -07:00 • committed by Tim Graham
parent 3fca95e1ad
commit d1413c5d70
2 changed files with 14 additions and 0 deletions
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11
tests/model_forms/test_modelchoicefield.py
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@ -115,6 +115,17 @@ class ModelChoiceFieldTests(TestCase):
(c4.pk, 'Fourth'),
])
def test_choices_bool(self):
f = forms.ModelChoiceField(Category.objects.all(), empty_label=None)
self.assertIs(bool(f.choices), True)
Category.objects.all().delete()
self.assertIs(bool(f.choices), False)
def test_choices_bool_empty_label(self):
f = forms.ModelChoiceField(Category.objects.all(), empty_label='--------')
Category.objects.all().delete()
self.assertIs(bool(f.choices), True)
def test_deepcopies_widget(self):
class ModelChoiceForm(forms.Form):
category = forms.ModelChoiceField(Category.objects.all())