#32657: Combining an empty Q with a negated Exists un-negates the Exists lookup
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Reporter: Jaap Roes | Owner: nobody
Type: Uncategorized | Status: new
Component: Uncategorized | Version: 3.2
Severity: Normal | Resolution:
Keywords: | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Jaap Roes):
Note, in Django 3.1 the code in the previous tests will raise a
`TypeError`, the following test case achieves the same and passes in
Django 3.1, main and (from what I understand) Django 3.2.1
{{{
class TestEmptyQExistsCombination(TestCase):
def test_combine(self):
q = Q() & Q(Exists(Book.objects.all()))
self.assertFalse(q.children[0].negated)
def test_combine_negated(self):
q = Q() & Q(~Exists(Book.objects.all()))
self.assertTrue(q.children[0].negated)
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/32657#comment:1>
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