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Fixed #24900 -- Allowed migrating backward to squashed migrations.

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Jacob Walls 2021-06-05 01:06:17 -04:00 • committed by Mariusz Felisiak
parent 9e17cc062c
commit 3219dd3388
3 changed files with 46 additions and 0 deletions
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24
tests/migrations/test_executor.py
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@ -104,6 +104,29 @@ class ExecutorTests(MigrationTestBase):
self.assertTableNotExists("migrations_author")
self.assertTableNotExists("migrations_book")
@override_settings(
MIGRATION_MODULES={'migrations': 'migrations.test_migrations_squashed'},
)
def test_migrate_backward_to_squashed_migration(self):
executor = MigrationExecutor(connection)
try:
self.assertTableNotExists('migrations_author')
self.assertTableNotExists('migrations_book')
executor.migrate([('migrations', '0001_squashed_0002')])
self.assertTableExists('migrations_author')
self.assertTableExists('migrations_book')
executor.loader.build_graph()
# Migrate backward to a squashed migration.
executor.migrate([('migrations', '0001_initial')])
self.assertTableExists('migrations_author')
self.assertTableNotExists('migrations_book')
finally:
# Unmigrate everything.
executor = MigrationExecutor(connection)
executor.migrate([('migrations', None)])
self.assertTableNotExists('migrations_author')
self.assertTableNotExists('migrations_book')
@override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_non_atomic"})
def test_non_atomic_migration(self):
"""
@ -733,6 +756,7 @@ class FakeLoader:
def __init__(self, graph, applied):
self.graph = graph
self.applied_migrations = applied
self.replace_migrations = True
class FakeMigration: