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Refs #31044 -- Fixed error message when using Prefetch with a values_list() queryset.

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This commit is contained in:
Mariusz Felisiak 2019-12-09 15:32:09 +01:00
parent 4540842bc3
commit d6505273cd
2 changed files with 6 additions and 3 deletions
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6
tests/prefetch_related/tests.py
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@ -815,15 +815,17 @@ class CustomPrefetchTests(TestCase):
self.traverse_qs(list(houses), [['occupants', 'houses', 'main_room']])
def test_values_queryset(self):
msg = 'Prefetch querysets cannot use raw() and values().'
msg = 'Prefetch querysets cannot use raw(), values(), and values_list().'
with self.assertRaisesMessage(ValueError, msg):
Prefetch('houses', House.objects.values('pk'))
with self.assertRaisesMessage(ValueError, msg):
Prefetch('houses', House.objects.values_list('pk'))
# That error doesn't affect managers with custom ModelIterable subclasses
self.assertIs(Teacher.objects_custom.all()._iterable_class, ModelIterableSubclass)
Prefetch('teachers', Teacher.objects_custom.all())
def test_raw_queryset(self):
msg = 'Prefetch querysets cannot use raw() and values().'
msg = 'Prefetch querysets cannot use raw(), values(), and values_list().'
with self.assertRaisesMessage(ValueError, msg):
Prefetch('houses', House.objects.raw('select pk from house'))