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Code Issues 30 Releases Wiki Activity

[5.0.x] Refs #34936 -- Added test for altering DecimalField with db_default to non-nullable.

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Backport of 1944f490f9 from main
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David Sanders 2023-10-31 22:37:40 +11:00 committed by Mariusz Felisiak
parent f1fbd061ac
commit 06b05c748f
1 changed files with 38 additions and 0 deletions
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38
tests/migrations/test_operations.py
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@ -1,4 +1,5 @@
import math
from decimal import Decimal
from django.core.exceptions import FieldDoesNotExist
from django.db import IntegrityError, connection, migrations, models, transaction
@ -2219,6 +2220,43 @@ class OperationTests(OperationTestBase):
pony = project_state.apps.get_model(app_label, "pony").objects.create(weight=1)
self.assertIsNone(pony.green)
def test_alter_field_change_nullable_to_decimal_database_default_not_null(self):
app_label = "test_alflcntdddn"
project_state = self.set_up_test_model(app_label)
operation_1 = migrations.AddField(
"Pony",
"height",
models.DecimalField(null=True, max_digits=5, decimal_places=2),
)
operation_2 = migrations.AlterField(
"Pony",
"height",
models.DecimalField(
max_digits=5, decimal_places=2, db_default=Decimal("12.22")
),
)
table_name = f"{app_label}_pony"
self.assertColumnNotExists(table_name, "height")
# Add field.
new_state = project_state.clone()
operation_1.state_forwards(app_label, new_state)
with connection.schema_editor() as editor:
operation_1.database_forwards(app_label, editor, project_state, new_state)
self.assertColumnExists(table_name, "height")
old_pony = new_state.apps.get_model(app_label, "pony").objects.create(weight=1)
self.assertIsNone(old_pony.height)
# Alter field.
project_state, new_state = new_state, new_state.clone()
operation_2.state_forwards(app_label, new_state)
with connection.schema_editor() as editor:
operation_2.database_forwards(app_label, editor, project_state, new_state)
old_pony.refresh_from_db()
self.assertEqual(old_pony.height, Decimal("12.22"))
pony = new_state.apps.get_model(app_label, "pony").objects.create(weight=2)
if not connection.features.can_return_columns_from_insert:
pony.refresh_from_db()
self.assertEqual(pony.height, Decimal("12.22"))
@skipIfDBFeature("interprets_empty_strings_as_nulls")
def test_alter_field_change_blank_nullable_database_default_to_not_null(self):
app_label = "test_alflcbnddnn"