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Code Issues 25 Releases Wiki Activity

Fixed #33246 -- Made squashmigrations raise CommandError when squashed_name already exists.

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andrewdotn 2021-11-02 00:13:42 -06:00 committed by GitHub
parent c3e0dfe4cc
commit 9e6d631697
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2 changed files with 15 additions and 0 deletions
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6
django/core/management/commands/squashmigrations.py
View File

@ -1,3 +1,5 @@
import os
from django.apps import apps
from django.conf import settings
from django.core.management.base import BaseCommand, CommandError
@ -184,6 +186,10 @@ class Command(BaseCommand):
# Write out the new migration file
writer = MigrationWriter(new_migration, include_header)
if os.path.exists(writer.path):
raise CommandError(
f'Migration {new_migration.name} already exists. Use a different name.'
)
with open(writer.path, "w", encoding='utf-8') as fh:
fh.write(writer.as_string())

9
tests/migrations/test_commands.py
View File

@ -2082,6 +2082,15 @@ class SquashMigrationsTests(MigrationTestBase):
squashed_migration_file = os.path.join(migration_dir, '0001_%s.py' % squashed_name)
self.assertTrue(os.path.exists(squashed_migration_file))
def test_squashed_name_exists(self):
msg = 'Migration 0001_initial already exists. Use a different name.'
with self.temporary_migration_module(module='migrations.test_migrations'):
with self.assertRaisesMessage(CommandError, msg):
call_command(
'squashmigrations', 'migrations', '0001', '0002',
squashed_name='initial', interactive=False, verbosity=0,
)
class AppLabelErrorTests(TestCase):
"""