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Code Issues 32 Releases Wiki Activity

Refs #28329 -- Fixed Cast() with ForeignKey to integer fields on MySQL.

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This commit is contained in:
David Wobrock 2023-03-06 21:17:58 +01:00 committed by Mariusz Felisiak
parent 254ad2e345
commit de0c7744be
2 changed files with 12 additions and 0 deletions
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3
django/db/models/fields/related.py
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@ -1162,6 +1162,9 @@ class ForeignKey(ForeignObject):
def db_type(self, connection): def db_type(self, connection):
return self.target_field.rel_db_type(connection=connection) return self.target_field.rel_db_type(connection=connection)
def cast_db_type(self, connection):
return self.target_field.cast_db_type(connection=connection)
def db_parameters(self, connection): def db_parameters(self, connection):
target_db_parameters = self.target_field.db_parameters(connection) target_db_parameters = self.target_field.db_parameters(connection)
return { return {

9
tests/db_functions/comparison/test_cast.py
View File

@ -76,6 +76,15 @@ class CastTests(TestCase):
numbers = Author.objects.annotate(cast_int=Cast("alias", field_class())) numbers = Author.objects.annotate(cast_int=Cast("alias", field_class()))
self.assertEqual(numbers.get().cast_int, 1) self.assertEqual(numbers.get().cast_int, 1)
def test_cast_to_integer_foreign_key(self):
numbers = Author.objects.annotate(
cast_fk=Cast(
models.Value("0"),
models.ForeignKey(Author, on_delete=models.SET_NULL),
)
)
self.assertEqual(numbers.get().cast_fk, 0)
def test_cast_to_duration(self): def test_cast_to_duration(self):
duration = datetime.timedelta(days=1, seconds=2, microseconds=3) duration = datetime.timedelta(days=1, seconds=2, microseconds=3)
DTModel.objects.create(duration=duration) DTModel.objects.create(duration=duration)