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Fixed #32750 -- Fixed crash of Extract() transform on OuterRef() expressions. 

Thanks Simon Charette for the review.
This commit is contained in:
Artur Beltsov 2021-05-16 15:25:35 +05:00 committed by Mariusz Felisiak
parent 0851933cba
commit 3954bf50fb
2 changed files with 37 additions and 1 deletions
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4
django/db/models/functions/datetime.py
View File

@ -64,7 +64,9 @@ class Extract(TimezoneMixin, Transform):
def resolve_expression(self, query=None, allow_joins=True, reuse=None, summarize=False, for_save=False):
copy = super().resolve_expression(query, allow_joins, reuse, summarize, for_save)
field = copy.lhs.output_field
field = getattr(copy.lhs, 'output_field', None)
if field is None:
return copy
if not isinstance(field, (DateField, DateTimeField, TimeField, DurationField)):
raise ValueError(
'Extract input expression must be DateField, DateTimeField, '

34
tests/db_functions/datetime/test_extract_trunc.py
View File

@ -266,6 +266,15 @@ class DateFunctionTests(TestCase):
with self.subTest(t):
self.assertIsNone(DTModel.objects.annotate(extracted=t).first().extracted)
def test_extract_outerref_validation(self):
inner_qs = DTModel.objects.filter(name=ExtractMonth(OuterRef('name')))
msg = (
'Extract input expression must be DateField, DateTimeField, '
'TimeField, or DurationField.'
)
with self.assertRaisesMessage(ValueError, msg):
DTModel.objects.annotate(related_name=Subquery(inner_qs.values('name')[:1]))
@skipUnlessDBFeature('has_native_duration_field')
def test_extract_duration(self):
start_datetime = datetime(2015, 6, 15, 14, 30, 50, 321)
@ -1098,6 +1107,31 @@ class DateFunctionTests(TestCase):
]
)
def test_extract_outerref(self):
datetime_1 = datetime(2000, 1, 1)
datetime_2 = datetime(2001, 3, 5)
datetime_3 = datetime(2002, 1, 3)
if settings.USE_TZ:
datetime_1 = timezone.make_aware(datetime_1, is_dst=False)
datetime_2 = timezone.make_aware(datetime_2, is_dst=False)
datetime_3 = timezone.make_aware(datetime_3, is_dst=False)
obj_1 = self.create_model(datetime_1, datetime_3)
obj_2 = self.create_model(datetime_2, datetime_1)
obj_3 = self.create_model(datetime_3, datetime_2)
inner_qs = DTModel.objects.filter(
start_datetime__year=2000,
start_datetime__month=ExtractMonth(OuterRef('end_datetime')),
)
qs = DTModel.objects.annotate(
related_pk=Subquery(inner_qs.values('pk')[:1]),
)
self.assertSequenceEqual(qs.order_by('name').values('pk', 'related_pk'), [
{'pk': obj_1.pk, 'related_pk': obj_1.pk},
{'pk': obj_2.pk, 'related_pk': obj_1.pk},
{'pk': obj_3.pk, 'related_pk': None},
])
@override_settings(USE_TZ=True, TIME_ZONE='UTC')
class DateFunctionWithTimeZoneTests(DateFunctionTests):