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Refs #27985 -- Reallowed using __exact=None as an alias for __isnull=True if a custom lookup class with lookup_name != None is registered as the exact lookup.

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Regression in 58da81a5a3 and prerequisite
for refs #28896.
This commit is contained in:
Sergey Fedoseev 2017-12-06 15:58:02 +05:00 • committed by Tim Graham
parent 7c7bc6391a
commit 10bfa876be
2 changed files with 27 additions and 9 deletions
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17
tests/custom_lookups/tests.py
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@ -240,6 +240,23 @@ class LookupTests(TestCase):
models.DateField._unregister_lookup(YearTransform)
models.DateField._unregister_lookup(YearTransform, custom_transform_name)
def test_custom_exact_lookup_none_rhs(self):
"""
__exact=None is transformed to __isnull=True if a custom lookup class
with lookup_name != 'exact' is registered as the `exact` lookup.
"""
class CustomExactLookup(models.Lookup):
lookup_name = 'somecustomlookup'
field = Author._meta.get_field('birthdate')
OldExactLookup = field.get_lookup('exact')
author = Author.objects.create(name='author', birthdate=None)
try:
type(field).register_lookup(Exactly, 'exact')
self.assertEqual(Author.objects.get(birthdate__exact=None), author)
finally:
type(field).register_lookup(OldExactLookup, 'exact')
def test_basic_lookup(self):
a1 = Author.objects.create(name='a1', age=1)
a2 = Author.objects.create(name='a2', age=2)