def __call__(self): # Run the migration to test executor = MigrationExecutor(connection) executor.loader.build_graph() # reload. executor.migrate(self._to) self.apps = executor.loader.project_state(self._to).apps
def setUp(self): assert ( self.migrate_from and self.migrate_to ), "TestCase '{}' must define migrate_from and migrate_to properties".format( type(self).__name__ ) # set up our temba test super().setUp() self.migrate_from = [(self.app, self.migrate_from)] self.migrate_to = [(self.app, self.migrate_to)] executor = MigrationExecutor(connection) old_apps = executor.loader.project_state(self.migrate_from).apps # Reverse to the original migration executor.migrate(self.migrate_from) self.setUpBeforeMigration(old_apps) # Run the migration to test executor = MigrationExecutor(connection) executor.loader.build_graph() # reload. executor.migrate(self.migrate_to) self.apps = executor.loader.project_state(self.migrate_to).apps
def __init__(self, _from, _to): self._to = _to executor = MigrationExecutor(connection) self.apps = executor.loader.project_state(_from).apps # Reverse to the original migration executor.migrate(_from)
def test_empty_plan(self): """ Tests that re-planning a full migration of a fully-migrated set doesn't perform spurious unmigrations and remigrations. There was previously a bug where the executor just always performed the backwards plan for applied migrations - which even for the most recent migration in an app, might include other, dependent apps, and these were being unmigrated. """ # Make the initial plan, check it # We use 'sessions' here as the second app as it's always present # in INSTALLED_APPS, so we can happily assign it test migrations. executor = MigrationExecutor(connection) plan = executor.migration_plan([("migrations", "0002_second"), ("sessions", "0001_initial")]) self.assertEqual( plan, [ (executor.loader.graph.nodes["migrations", "0001_initial"], False), (executor.loader.graph.nodes["migrations", "0002_second"], False), (executor.loader.graph.nodes["sessions", "0001_initial"], False), ], ) # Fake-apply all migrations executor.migrate([("migrations", "0002_second"), ("sessions", "0001_initial")], fake=True) # Rebuild the graph to reflect the new DB state executor.loader.build_graph() # Now plan a second time and make sure it's empty plan = executor.migration_plan([("migrations", "0002_second"), ("sessions", "0001_initial")]) self.assertEqual(plan, []) # Erase all the fake records executor.recorder.flush()
def _migrate_from_old_targets(self, tmp_path): if "sqlite3" in self.databases['default']['ENGINE']: try: delete_path(self.databases['default']['NAME']) except Exception: self.clear(False) setup_from_none() self.read() else: self.clear(False) from django.db import DEFAULT_DB_ALIAS, connections from django.apps import apps from django.utils.module_loading import module_has_submodule from django.db.migrations.executor import MigrationExecutor from django.core.management.sql import emit_pre_migrate_signal, emit_post_migrate_signal for app_config in apps.get_app_configs(): if module_has_submodule(app_config.module, "management"): import_module('.management', app_config.name) connection = connections[DEFAULT_DB_ALIAS] connection.prepare_database() executor = MigrationExecutor(connection) emit_pre_migrate_signal(0, None, connection.alias) executor.migrate(executor.loader.graph.leaf_nodes()) emit_post_migrate_signal(0, None, connection.alias) self.clear(True, ['django_migrations'])
def test_alter_id_type_with_fk(self): try: executor = MigrationExecutor(connection) self.assertTableNotExists("author_app_author") self.assertTableNotExists("book_app_book") # Apply initial migrations executor.migrate([ ("author_app", "0001_initial"), ("book_app", "0001_initial"), ]) self.assertTableExists("author_app_author") self.assertTableExists("book_app_book") # Rebuild the graph to reflect the new DB state executor.loader.build_graph() # Apply PK type alteration executor.migrate([("author_app", "0002_alter_id")]) # Rebuild the graph to reflect the new DB state executor.loader.build_graph() finally: # We can't simply unapply the migrations here because there is no # implicit cast from VARCHAR to INT on the database level. with connection.schema_editor() as editor: editor.execute(editor.sql_delete_table % {"table": "book_app_book"}) editor.execute(editor.sql_delete_table % {"table": "author_app_author"}) self.assertTableNotExists("author_app_author") self.assertTableNotExists("book_app_book")
def test_custom_user(self): """ Regression test for #22325 - references to a custom user model defined in the same app are not resolved correctly. """ executor = MigrationExecutor(connection) self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble") # Migrate forwards executor.migrate([("migrations", "0001_initial")]) self.assertTableExists("migrations_author") self.assertTableExists("migrations_tribble") # Make sure the soft-application detection works (#23093) # Change table_names to not return auth_user during this as # it wouldn't be there in a normal run, and ensure migrations.Author # exists in the global app registry temporarily. old_table_names = connection.introspection.table_names connection.introspection.table_names = lambda c: [x for x in old_table_names(c) if x != "auth_user"] migrations_apps = executor.loader.project_state(("migrations", "0001_initial")).apps global_apps.get_app_config("migrations").models["author"] = migrations_apps.get_model("migrations", "author") try: migration = executor.loader.get_migration("auth", "0001_initial") self.assertEqual(executor.detect_soft_applied(None, migration)[0], True) finally: connection.introspection.table_names = old_table_names del global_apps.get_app_config("migrations").models["author"] # And migrate back to clean up the database executor.loader.build_graph() executor.migrate([("migrations", None)]) self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble")
def test_run(self): """ Tests running a simple set of migrations. """ executor = MigrationExecutor(connection) executor.recorder.flush() # Let's look at the plan first and make sure it's up to scratch plan = executor.migration_plan([("migrations", "0002_second")]) self.assertEqual( plan, [ (executor.loader.graph.nodes["migrations", "0001_initial"], False), (executor.loader.graph.nodes["migrations", "0002_second"], False), ], ) # Were the tables there before? self.assertNotIn("migrations_author", connection.introspection.get_table_list(connection.cursor())) self.assertNotIn("migrations_book", connection.introspection.get_table_list(connection.cursor())) # Alright, let's try running it executor.migrate([("migrations", "0002_second")]) # Are the tables there now? self.assertIn("migrations_author", connection.introspection.get_table_list(connection.cursor())) self.assertIn("migrations_book", connection.introspection.get_table_list(connection.cursor())) # Alright, let's undo what we did executor.migrate([("migrations", None)]) # Are the tables gone? self.assertNotIn("migrations_author", connection.introspection.get_table_list(connection.cursor())) self.assertNotIn("migrations_book", connection.introspection.get_table_list(connection.cursor()))
def test_run_with_squashed(self): """ Tests running a squashed migration from zero (should ignore what it replaces) """ executor = MigrationExecutor(connection) # Check our leaf node is the squashed one leaves = [key for key in executor.loader.graph.leaf_nodes() if key[0] == "migrations"] self.assertEqual(leaves, [("migrations", "0001_squashed_0002")]) # Check the plan plan = executor.migration_plan([("migrations", "0001_squashed_0002")]) self.assertEqual(plan, [(executor.loader.graph.nodes["migrations", "0001_squashed_0002"], False)]) # Were the tables there before? self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_book") # Alright, let's try running it executor.migrate([("migrations", "0001_squashed_0002")]) # Are the tables there now? self.assertTableExists("migrations_author") self.assertTableExists("migrations_book") # Rebuild the graph to reflect the new DB state executor.loader.build_graph() # Alright, let's undo what we did. Should also just use squashed. plan = executor.migration_plan([("migrations", None)]) self.assertEqual(plan, [(executor.loader.graph.nodes["migrations", "0001_squashed_0002"], True)]) executor.migrate([("migrations", None)]) # Are the tables gone? self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_book")
def test_soft_apply(self): """ Tests detection of initial migrations already having been applied. """ state = {"faked": None} def fake_storer(phase, migration=None, fake=None): state["faked"] = fake executor = MigrationExecutor(connection, progress_callback=fake_storer) # Were the tables there before? self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble") # Run it normally self.assertEqual( executor.migration_plan([("migrations", "0001_initial")]), [ (executor.loader.graph.nodes["migrations", "0001_initial"], False), ], ) executor.migrate([("migrations", "0001_initial")]) # Are the tables there now? self.assertTableExists("migrations_author") self.assertTableExists("migrations_tribble") # We shouldn't have faked that one self.assertEqual(state["faked"], False) # Rebuild the graph to reflect the new DB state executor.loader.build_graph() # Fake-reverse that executor.migrate([("migrations", None)], fake=True) # Are the tables still there? self.assertTableExists("migrations_author") self.assertTableExists("migrations_tribble") # Make sure that was faked self.assertEqual(state["faked"], True) # Finally, migrate forwards; this should fake-apply our initial migration executor.loader.build_graph() self.assertEqual( executor.migration_plan([("migrations", "0001_initial")]), [ (executor.loader.graph.nodes["migrations", "0001_initial"], False), ], ) # Applying the migration should raise a database level error # because we haven't given the --fake-initial option with self.assertRaises(DatabaseError): executor.migrate([("migrations", "0001_initial")]) # Reset the faked state state = {"faked": None} # Allow faking of initial CreateModel operations executor.migrate([("migrations", "0001_initial")], fake_initial=True) self.assertEqual(state["faked"], True) # And migrate back to clean up the database executor.loader.build_graph() executor.migrate([("migrations", None)]) self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble")
def test_migrations_applied_and_recorded_atomically(self): """Migrations are applied and recorded atomically.""" executor = MigrationExecutor(connection) with mock.patch('django.db.migrations.executor.MigrationExecutor.record_migration') as record_migration: record_migration.side_effect = RuntimeError('Recording migration failed.') with self.assertRaisesMessage(RuntimeError, 'Recording migration failed.'): executor.migrate([('migrations', '0001_initial')]) # The migration isn't recorded as applied since it failed. migration_recorder = MigrationRecorder(connection) self.assertFalse(migration_recorder.migration_qs.filter(app='migrations', name='0001_initial').exists()) self.assertTableNotExists('migrations_author')
def test_atomic_operation_in_non_atomic_migration(self): """ An atomic operation is properly rolled back inside a non-atomic migration. """ executor = MigrationExecutor(connection) with self.assertRaisesMessage(RuntimeError, "Abort migration"): executor.migrate([("migrations", "0001_initial")]) migrations_apps = executor.loader.project_state(("migrations", "0001_initial")).apps Editor = migrations_apps.get_model("migrations", "Editor") self.assertFalse(Editor.objects.exists())
def test_non_atomic_migration(self): """ Applying a non-atomic migration works as expected. """ executor = MigrationExecutor(connection) with self.assertRaisesMessage(RuntimeError, "Abort migration"): executor.migrate([("migrations", "0001_initial")]) self.assertTableExists("migrations_publisher") migrations_apps = executor.loader.project_state(("migrations", "0001_initial")).apps Publisher = migrations_apps.get_model("migrations", "Publisher") self.assertTrue(Publisher.objects.exists()) self.assertTableNotExists("migrations_book")
def test_detect_soft_applied_add_field_manytomanyfield(self): """ executor.detect_soft_applied() detects ManyToManyField tables from an AddField operation. This checks the case of AddField in a migration with other operations (0001) and the case of AddField in its own migration (0002). """ tables = [ # from 0001 "migrations_project", "migrations_task", "migrations_project_tasks", # from 0002 "migrations_task_projects", ] executor = MigrationExecutor(connection) # Create the tables for 0001 but make it look like the migration hasn't # been applied. executor.migrate([("migrations", "0001_initial")]) executor.migrate([("migrations", None)], fake=True) for table in tables[:3]: self.assertTableExists(table) # Table detection sees 0001 is applied but not 0002. migration = executor.loader.get_migration("migrations", "0001_initial") self.assertEqual(executor.detect_soft_applied(None, migration)[0], True) migration = executor.loader.get_migration("migrations", "0002_initial") self.assertEqual(executor.detect_soft_applied(None, migration)[0], False) # Create the tables for both migrations but make it look like neither # has been applied. executor.loader.build_graph() executor.migrate([("migrations", "0001_initial")], fake=True) executor.migrate([("migrations", "0002_initial")]) executor.loader.build_graph() executor.migrate([("migrations", None)], fake=True) # Table detection sees 0002 is applied. migration = executor.loader.get_migration("migrations", "0002_initial") self.assertEqual(executor.detect_soft_applied(None, migration)[0], True) # Leave the tables for 0001 except the many-to-many table. That missing # table should cause detect_soft_applied() to return False. with connection.schema_editor() as editor: for table in tables[2:]: editor.execute(editor.sql_delete_table % {"table": table}) migration = executor.loader.get_migration("migrations", "0001_initial") self.assertEqual(executor.detect_soft_applied(None, migration)[0], False) # Cleanup by removing the remaining tables. with connection.schema_editor() as editor: for table in tables[:2]: editor.execute(editor.sql_delete_table % {"table": table}) for table in tables: self.assertTableNotExists(table)
def migrate(self, targets): """ Migrate to a new state. MigrationExecutors can not be reloaded, as they cache the state of the migrations when created. Attempting to reuse one might make some migrations not run, as it thinks they have already been run. """ executor = MigrationExecutor(connection) executor.migrate(targets) # Cant load state for apps in the initial empty state state_nodes = [node for node in targets if node[1] is not None] return executor.loader.project_state(state_nodes).apps
def test_soft_apply(self): """ Tests detection of initial migrations already having been applied. """ state = {"faked": None} def fake_storer(phase, migration, fake): state["faked"] = fake executor = MigrationExecutor(connection, progress_callback=fake_storer) executor.recorder.flush() # Were the tables there before? self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble") # Run it normally executor.migrate([("migrations", "0001_initial")]) # Are the tables there now? self.assertTableExists("migrations_author") self.assertTableExists("migrations_tribble") # We shouldn't have faked that one self.assertEqual(state["faked"], False) # Rebuild the graph to reflect the new DB state executor.loader.build_graph() # Fake-reverse that executor.migrate([("migrations", None)], fake=True) # Are the tables still there? self.assertTableExists("migrations_author") self.assertTableExists("migrations_tribble") # Make sure that was faked self.assertEqual(state["faked"], True) # Finally, migrate forwards; this should fake-apply our initial migration executor.migrate([("migrations", "0001_initial")]) self.assertEqual(state["faked"], True) # And migrate back to clean up the database executor.migrate([("migrations", None)]) self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble")
def test_empty_plan(self): """ Re-planning a full migration of a fully-migrated set doesn't perform spurious unmigrations and remigrations. There was previously a bug where the executor just always performed the backwards plan for applied migrations - which even for the most recent migration in an app, might include other, dependent apps, and these were being unmigrated. """ # Make the initial plan, check it executor = MigrationExecutor(connection) plan = executor.migration_plan([ ("migrations", "0002_second"), ("migrations2", "0001_initial"), ]) self.assertEqual( plan, [ (executor.loader.graph.nodes["migrations", "0001_initial"], False), (executor.loader.graph.nodes["migrations", "0002_second"], False), (executor.loader.graph.nodes["migrations2", "0001_initial"], False), ], ) # Fake-apply all migrations executor.migrate([ ("migrations", "0002_second"), ("migrations2", "0001_initial") ], fake=True) # Rebuild the graph to reflect the new DB state executor.loader.build_graph() # Now plan a second time and make sure it's empty plan = executor.migration_plan([ ("migrations", "0002_second"), ("migrations2", "0001_initial"), ]) self.assertEqual(plan, []) # The resulting state should include applied migrations. state = executor.migrate([ ("migrations", "0002_second"), ("migrations2", "0001_initial"), ]) self.assertIn(('migrations', 'book'), state.models) self.assertIn(('migrations', 'author'), state.models) self.assertIn(('migrations2', 'otherauthor'), state.models) # Erase all the fake records executor.recorder.record_unapplied("migrations2", "0001_initial") executor.recorder.record_unapplied("migrations", "0002_second") executor.recorder.record_unapplied("migrations", "0001_initial")
def setUp(self): executor = MigrationExecutor(connection) # Migrate to start_migration (the migration before the one you want to test) executor.migrate([(self.app_name, self.start_migration)]) # Rebuild graph. Done between invocations of migrate() executor.loader.build_graph() # Run the migration you want to test executor.migrate([(self.app_name, self.dest_migration)]) # This application can now be used to get the latest models for testing self.django_application = executor.loader.project_state( [(self.app_name, self.dest_migration)] ).apps
def test_migrate_marks_replacement_applied_even_if_it_did_nothing(self): """ A new squash migration will be marked as applied even if all its replaced migrations were previously already applied (#24628). """ recorder = MigrationRecorder(connection) # Record all replaced migrations as applied recorder.record_applied("migrations", "0001_initial") recorder.record_applied("migrations", "0002_second") executor = MigrationExecutor(connection) executor.migrate([("migrations", "0001_squashed_0002")]) # Because 0001 and 0002 are both applied, even though this migrate run # didn't apply anything new, their squashed replacement should be # marked as applied. self.assertIn(("migrations", "0001_squashed_0002"), recorder.applied_migrations())
def test_custom_user(self): """ Regression test for #22325 - references to a custom user model defined in the same app are not resolved correctly. """ executor = MigrationExecutor(connection) self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble") # Migrate forwards executor.migrate([("migrations", "0001_initial")]) self.assertTableExists("migrations_author") self.assertTableExists("migrations_tribble") # And migrate back to clean up the database executor.loader.build_graph() executor.migrate([("migrations", None)]) self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble")
def test_apply_all_replaced_marks_replacement_as_applied(self): """ Applying all replaced migrations marks replacement as applied (#24628). """ recorder = MigrationRecorder(connection) # Place the database in a state where the replaced migrations are # partially applied: 0001 is applied, 0002 is not. recorder.record_applied("migrations", "0001_initial") executor = MigrationExecutor(connection) # Use fake because we don't actually have the first migration # applied, so the second will fail. And there's no need to actually # create/modify tables here, we're just testing the # MigrationRecord, which works the same with or without fake. executor.migrate([("migrations", "0002_second")], fake=True) # Because we've now applied 0001 and 0002 both, their squashed # replacement should be marked as applied. self.assertIn(("migrations", "0001_squashed_0002"), recorder.applied_migrations())
def setUp(self) -> None: assert self.migrate_from and self.migrate_to, \ "TestCase '{}' must define migrate_from and migrate_to properties".format(type(self).__name__) migrate_from = [(self.app, self.migrate_from)] # type: List[Tuple[str, str]] migrate_to = [(self.app, self.migrate_to)] # type: List[Tuple[str, str]] executor = MigrationExecutor(connection) old_apps = executor.loader.project_state(migrate_from).apps # Reverse to the original migration executor.migrate(migrate_from) self.setUpBeforeMigration(old_apps) # Run the migration to test executor = MigrationExecutor(connection) executor.loader.build_graph() # reload. executor.migrate(migrate_to) self.apps = executor.loader.project_state(migrate_to).apps
def test_process_callback(self): """ #24129 - Tests callback process """ call_args_list = [] def callback(*args): call_args_list.append(args) executor = MigrationExecutor(connection, progress_callback=callback) # Were the tables there before? self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble") executor.migrate([ ("migrations", "0001_initial"), ("migrations", "0002_second"), ]) # Rebuild the graph to reflect the new DB state executor.loader.build_graph() executor.migrate([ ("migrations", None), ("migrations", None), ]) self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble") migrations = executor.loader.graph.nodes expected = [ ("render_start", ), ("render_success", ), ("apply_start", migrations['migrations', '0001_initial'], False), ("apply_success", migrations['migrations', '0001_initial'], False), ("apply_start", migrations['migrations', '0002_second'], False), ("apply_success", migrations['migrations', '0002_second'], False), ("render_start", ), ("render_success", ), ("unapply_start", migrations['migrations', '0002_second'], False), ("unapply_success", migrations['migrations', '0002_second'], False), ("unapply_start", migrations['migrations', '0001_initial'], False), ("unapply_success", migrations['migrations', '0001_initial'], False), ] self.assertEqual(call_args_list, expected)
class Migrator: def __init__(self, migrate_from, migrate_to): self.migrate_from = migrate_from self.migrate_to = migrate_to self.executor = MigrationExecutor(connection) self.executor.loader.build_graph() # reload. self.executor.migrate(self.migrate_from) def run_migration(self): self.executor.loader.build_graph() # reload. self.executor.migrate(self.migrate_to) @property def old_apps(self): return self.executor.loader.project_state(self.migrate_from).apps @property def new_apps(self): return self.executor.loader.project_state(self.migrate_to).apps
def test_unrelated_applied_migrations_mutate_state(self): """ #26647 - Unrelated applied migrations should be part of the final state in both directions. """ executor = MigrationExecutor(connection) executor.migrate([ ('mutate_state_b', '0002_add_field'), ]) # Migrate forward. executor.loader.build_graph() state = executor.migrate([ ('mutate_state_a', '0001_initial'), ]) self.assertIn('added', dict(state.models['mutate_state_b', 'b'].fields)) executor.loader.build_graph() # Migrate backward. state = executor.migrate([ ('mutate_state_a', None), ]) self.assertIn('added', dict(state.models['mutate_state_b', 'b'].fields))
def test_backwards_deps(self): """ #23474 - Migrating backwards shouldn't cause the wrong migrations to be unapplied. Migration dependencies (x -> y === y depends on x): m.0001 -+-> m.0002 +-> m2.0001 1) Migrate m2 to 0001, causing { m.0001, m2.0002 } to be applied. 2) Migrate m to 0001. m.0001 has already been applied, so this should be a noop. """ executor = MigrationExecutor(connection) executor.migrate([("migrations2", "0001_initial")]) try: self.assertTableExists("migrations2_example") # Rebuild the graph to reflect the new DB state executor.loader.build_graph() self.assertEqual( executor.migration_plan([("migrations", "0001_initial")]), [], ) executor.migrate([("migrations", "0001_initial")]) self.assertTableExists("migrations2_example") finally: # And migrate back to clean up the database executor.loader.build_graph() executor.migrate([("migrations", None)]) self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_tribble")
def test_unrelated_model_lookups_backwards(self): """ #24123 - Tests that all models of apps being unapplied which are unrelated to the first app being unapplied are part of the initial model state. """ try: executor = MigrationExecutor(connection) self.assertTableNotExists("lookuperror_a_a1") self.assertTableNotExists("lookuperror_b_b1") self.assertTableNotExists("lookuperror_c_c1") executor.migrate([("lookuperror_a", "0004_a4"), ("lookuperror_b", "0003_b3"), ("lookuperror_c", "0003_c3")]) self.assertTableExists("lookuperror_b_b3") self.assertTableExists("lookuperror_a_a4") self.assertTableExists("lookuperror_c_c3") # Rebuild the graph to reflect the new DB state executor.loader.build_graph() # Migrate backwards -- This led to a lookup LookupErrors because # lookuperror_b.B2 is not in the initial state (unrelated to app c) executor.migrate([("lookuperror_a", None)]) # Rebuild the graph to reflect the new DB state executor.loader.build_graph() finally: # Cleanup executor.migrate([("lookuperror_b", None), ("lookuperror_c", None)]) self.assertTableNotExists("lookuperror_a_a1") self.assertTableNotExists("lookuperror_b_b1") self.assertTableNotExists("lookuperror_c_c1")
def setUp(self): assert self.migrate_from and self.migrate_to, \ "TestCase '{}' must define migrate_from and migrate_to properties".format(type(self).__name__) self.migrate_from = [(self.app, self.migrate_from)] self.migrate_to = [(self.app, self.migrate_to)] executor = MigrationExecutor(connection) #print('unmigrated: %s'%executor.loader.unmigrated_apps) #print('migrated: %s'%executor.loader.migrated_apps) #executor.loader.build_graph() # reload. old_apps = executor.loader.project_state(self.migrate_from).apps executor.migrate(self.migrate_from) self.setUpBeforeMigration(old_apps) # Run the migration to test executor = MigrationExecutor(connection) executor.loader.build_graph() # reload. executor.migrate(self.migrate_to) self.apps = executor.loader.project_state(self.migrate_to).apps
def test_run(self): """ Tests running a simple set of migrations. """ executor = MigrationExecutor(connection) executor.recorder.flush() # Let's look at the plan first and make sure it's up to scratch plan = executor.migration_plan([("migrations", "0002_second")]) self.assertEqual( plan, [ (executor.loader.graph.nodes["migrations", "0001_initial"], False), (executor.loader.graph.nodes["migrations", "0002_second"], False), ], ) # Were the tables there before? self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_book") # Alright, let's try running it executor.migrate([("migrations", "0002_second")]) # Are the tables there now? self.assertTableExists("migrations_author") self.assertTableExists("migrations_book") # Rebuild the graph to reflect the new DB state executor.loader.build_graph() # Alright, let's undo what we did plan = executor.migration_plan([("migrations", None)]) self.assertEqual( plan, [ (executor.loader.graph.nodes["migrations", "0002_second"], True), (executor.loader.graph.nodes["migrations", "0001_initial"], True), ], ) executor.migrate([("migrations", None)]) # Are the tables gone? self.assertTableNotExists("migrations_author") self.assertTableNotExists("migrations_book")
def setUp(self): assert self.migrate_from and self.migrate_to, \ "TestCase '{}' must define migrate_from and migrate_to properties".format( type(self).__name__) self.migrate_from = [(self.app, self.migrate_from)] self.migrate_to = [(self.app, self.migrate_to)] executor = MigrationExecutor(connection) # Reverse to the original migration executor.migrate(self.migrate_from) old_apps = executor.loader.project_state(self.migrate_from).apps self.setUpBeforeMigration(old_apps) # Run the migration to test executor = MigrationExecutor(connection) executor.migrate(self.migrate_to) self.apps = executor.loader.project_state(self.migrate_to).apps self.setUpAfterMigration(self.apps)
def test_add_case_families(transactional_db): executor = MigrationExecutor(connection) app = "caluma_workflow" migrate_from = [(app, "0019_slugfield_length")] migrate_to = [(app, "0020_case_families")] executor.migrate(migrate_from) old_apps = executor.loader.project_state(migrate_from).apps # Create some old data. Can't use factories here Case = old_apps.get_model(app, "Case") Workflow = old_apps.get_model(app, "Workflow") WorkItem = old_apps.get_model(app, "WorkItem") Task = old_apps.get_model(app, "Task") HistoricalCase = old_apps.get_model(app, "HistoricalCase") workflow = Workflow.objects.create(slug="main-workflow") case = Case.objects.create(workflow=workflow) child_case = Case.objects.create(workflow=workflow) task = Task.objects.create() WorkItem.objects.create(child_case=child_case, case=case, task=task) WorkItem.objects.create(child_case=None, case=child_case, task=task) historical_case = HistoricalCase.objects.create( workflow=workflow, id=case.pk, created_at=timezone.now(), modified_at=timezone.now(), history_date=timezone.now(), ) historical__child_case = HistoricalCase.objects.create( workflow=workflow, id=child_case.pk, created_at=timezone.now(), modified_at=timezone.now(), history_date=timezone.now(), ) historical_orphan_case = HistoricalCase.objects.create( workflow=workflow, created_at=timezone.now(), modified_at=timezone.now(), history_date=timezone.now(), ) # Migrate forwards. executor.loader.build_graph() # reload. executor.migrate(migrate_to) new_apps = executor.loader.project_state(migrate_to).apps # Test the new data. Case = new_apps.get_model(app, "Case") HistoricalCase = new_apps.get_model(app, "HistoricalCase") # Refresh objects case = Case.objects.get(pk=case.pk) historical_case = HistoricalCase.objects.get(pk=historical_case.pk) historical__child_case = HistoricalCase.objects.get( pk=historical__child_case.pk) historical_orphan_case = HistoricalCase.objects.get( pk=historical_orphan_case.pk) for c in Case.objects.iterator(): assert c.family.pk == case.pk assert historical_case.family_id == historical__child_case.family_id == case.id assert historical_orphan_case.family_id == historical_orphan_case.id
def handle(self, *args, **options): self.verbosity = options.get('verbosity') self.interactive = options.get('interactive') self.show_traceback = options.get('traceback') self.load_initial_data = options.get('load_initial_data') db_dry_run = options.get("db_dry_run") # Get the database we're operating from db = options.get('database') connection = connections[db] # If they asked for a migration listing, quit main execution flow and show it if options.get("list", False): self.stderr.write( "The 'migrate --list' command is deprecated. Use 'showmigrations' instead." ) self.stdout.ending = None # Remove when #21429 is fixed return call_command( 'showmigrations', '--list', app_labels=[options['app_label']] if options['app_label'] else None, database=db, no_color=options.get('no_color'), settings=options.get('settings'), stdout=self.stdout, traceback=self.show_traceback, verbosity=self.verbosity, ) # Hook for backends needing any database preparation connection.prepare_database() # Work out which apps have migrations and which do not executor = MigrationExecutor(connection, self.migration_progress_callback) # Before anything else, see if there's conflicting apps and drop out # hard if there are any conflicts = executor.loader.detect_conflicts() if conflicts: name_str = "; ".join("%s in %s" % (", ".join(names), app) for app, names in conflicts.items()) raise CommandError( "Conflicting migrations detected (%s).\nTo fix them run " "'python manage.py makemigrations --merge'" % name_str) # If they supplied command line arguments, work out what they mean. run_syncdb = False target_app_labels_only = True if options['app_label'] and options['migration_name']: app_label, migration_name = options['app_label'], options[ 'migration_name'] if app_label not in executor.loader.migrated_apps: raise CommandError( "App '%s' does not have migrations (you cannot selectively " "sync unmigrated apps)" % app_label) if migration_name == "zero": targets = [(app_label, None)] else: try: migration = executor.loader.get_migration_by_prefix( app_label, migration_name) except AmbiguityError: raise CommandError( "More than one migration matches '%s' in app '%s'. " "Please be more specific." % (migration_name, app_label)) except KeyError: raise CommandError( "Cannot find a migration matching '%s' from app '%s'." % (migration_name, app_label)) targets = [(app_label, migration.name)] target_app_labels_only = False elif options['app_label']: app_label = options['app_label'] if app_label not in executor.loader.migrated_apps: raise CommandError( "App '%s' does not have migrations (you cannot selectively " "sync unmigrated apps)" % app_label) targets = [ key for key in executor.loader.graph.leaf_nodes() if key[0] == app_label ] else: targets = executor.loader.graph.leaf_nodes() run_syncdb = True plan = executor.migration_plan(targets) # Print some useful info if self.verbosity >= 1: self.stdout.write( self.style.MIGRATE_HEADING("Operations to perform:")) if run_syncdb and executor.loader.unmigrated_apps: self.stdout.write( self.style.MIGRATE_LABEL(" Synchronize unmigrated apps: ") + (", ".join(executor.loader.unmigrated_apps))) if target_app_labels_only: self.stdout.write( self.style.MIGRATE_LABEL(" Apply all migrations: ") + (", ".join(set(a for a, n in targets)) or "(none)")) else: if targets[0][1] is None: self.stdout.write( self.style.MIGRATE_LABEL(" Unapply all migrations: ") + "%s" % (targets[0][0], )) else: self.stdout.write( self.style.MIGRATE_LABEL( " Target specific migration: ") + "%s, from %s" % (targets[0][1], targets[0][0])) # Run the syncdb phase. # If you ever manage to get rid of this, I owe you many, many drinks. # Note that pre_migrate is called from inside here, as it needs # the list of models about to be installed. if run_syncdb and executor.loader.unmigrated_apps: if self.verbosity >= 1: self.stdout.write( self.style.MIGRATE_HEADING( "Synchronizing apps without migrations:")) created_models = self.sync_apps(connection, executor.loader.unmigrated_apps) else: created_models = [] emit_pre_migrate_signal([], self.verbosity, self.interactive, connection.alias) # The test runner requires us to flush after a syncdb but before migrations, # so do that here. if options.get("test_flush", False): call_command( 'flush', verbosity=max(self.verbosity - 1, 0), interactive=False, database=db, reset_sequences=False, inhibit_post_migrate=True, ) # Migrate! if self.verbosity >= 1: if db_dry_run: self.stdout.write( self.style.MIGRATE_HEADING("Running migrations dry-run:")) else: self.stdout.write( self.style.MIGRATE_HEADING("Running migrations:")) if not plan: executor.check_replacements() if self.verbosity >= 1: self.stdout.write(" No migrations to apply.") # If there's changes that aren't in migrations yet, tell them how to fix it. autodetector = MigrationAutodetector( executor.loader.project_state(), ProjectState.from_apps(apps), ) changes = autodetector.changes(graph=executor.loader.graph) if changes: self.stdout.write( self.style.NOTICE( " Your models have changes that are not yet reflected " "in a migration, and so won't be applied.")) self.stdout.write( self.style.NOTICE( " Run 'manage.py makemigrations' to make new " "migrations, and then re-run 'manage.py migrate' to " "apply them.")) else: fake = options.get("fake") fake_initial = options.get("fake_initial") if db_dry_run: # Print the SQL without making changes if db_dry_run is set sql_statements = executor.collect_sql(plan) return '\n'.join(sql_statements) else: executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial) # Send the post_migrate signal, so individual apps can do whatever they need # to do at this point. emit_post_migrate_signal(created_models, self.verbosity, self.interactive, connection.alias)
def handle(self, *args, **options): self.verbosity = options['verbosity'] self.interactive = options['interactive'] # @@ TODO あとで。 # managementを読んで何をしているのか。 # Import the 'management' module within each installed app, to register # dispatcher events. for app_config in apps.get_app_configs(): if module_has_submodule(app_config.module, "management"): import_module('.management', app_config.name) logger.debug('options {}'.format(options)) # @@ 普通は`default`が入っている db = options['database'] # @@ 対応するDBへのコネクションラッパを取得する # ConnectionHandler().__getitem__(db) # django.db.backends.sqlite3.base.DatabaseWrapper が戻る connection = connections[db] logger.debug('connection {}'.format(connection)) # @@ sqlite3では未実装なのでpass # 実際のところgisだけっぽい # postgisのbaseより。 # def prepare_database(self): # super().prepare_database() # # Check that postgis extension is installed. # with self.cursor() as cursor: # cursor.execute("CREATE EXTENSION IF NOT EXISTS postgis") connection.prepare_database() # Work out which apps have migrations and which do not # @@ executorの取得 # migration_progress_callbackは進捗をstdoutにいい感じにだすための処理 # DBから状態を取り出し、適用をするクラス executor = MigrationExecutor(connection, self.migration_progress_callback) # Raise an error if any migrations are applied before their dependencies. # @@ # executor.loaderはMigrationLoader # 適用済マイグレーションのツリーの一貫性チェック # 適用されているマイグレーションのparentがgraph.nodesにあるかを見ている # どこかで辿りきれなくなっているのはまずいので。どこかで流れが変わっている可能性がある executor.loader.check_consistent_history(connection) # Before anything else, see if there's conflicting apps and drop out # hard if there are any # @@ マイグレーションファイルのコンフリクトチェック # 同じAppで複数のリーフが存在していないかを見ている conflicts = executor.loader.detect_conflicts() if conflicts: name_str = "; ".join( "%s in %s" % (", ".join(names), app) for app, names in conflicts.items() ) raise CommandError( "Conflicting migrations detected; multiple leaf nodes in the " "migration graph: (%s).\nTo fix them run " "'python manage.py makemigrations --merge'" % name_str ) # If they supplied command line arguments, work out what they mean. # @@ app_labelやmigration_nameの対応 # 該当する部分だけをdisk_migrationから取り出す # 未指定なら全部の末端ノードを取り出す target_app_labels_only = True if options['app_label'] and options['migration_name']: app_label, migration_name = options['app_label'], options['migration_name'] if app_label not in executor.loader.migrated_apps: raise CommandError( "App '%s' does not have migrations." % app_label ) if migration_name == "zero": targets = [(app_label, None)] else: try: # @@ # migration_nameは前方一致で単一になればなんでもいい migration = executor.loader.get_migration_by_prefix(app_label, migration_name) except AmbiguityError: raise CommandError( "More than one migration matches '%s' in app '%s'. " "Please be more specific." % (migration_name, app_label) ) except KeyError: raise CommandError("Cannot find a migration matching '%s' from app '%s'." % ( migration_name, app_label)) targets = [(app_label, migration.name)] target_app_labels_only = False elif options['app_label']: app_label = options['app_label'] if app_label not in executor.loader.migrated_apps: raise CommandError( "App '%s' does not have migrations." % app_label ) targets = [key for key in executor.loader.graph.leaf_nodes() if key[0] == app_label] else: targets = executor.loader.graph.leaf_nodes() logger.debug('migration target {}'.format(targets)) # @@ # 実際に適用すべきマイグレーションを決定する plan = executor.migration_plan(targets) logger.debug('plan {}'.format(plan)) # @@ # https://docs.djangoproject.com/en/2.0/ref/django-admin/#django-admin-migrate # --run-syncdb¶ # Allows creating tables for apps without migrations. While this isn’t recommended, # the migrations framework is sometimes too slow on large projects with hundreds of models. # これのためにあるらしい run_syncdb = options['run_syncdb'] and executor.loader.unmigrated_apps logger.debug('executor.loader.unmigrated_apps {}'.format(executor.loader.unmigrated_apps)) # Print some useful info if self.verbosity >= 1: self.stdout.write(self.style.MIGRATE_HEADING("Operations to perform:")) if run_syncdb: self.stdout.write( self.style.MIGRATE_LABEL(" Synchronize unmigrated apps: ") + (", ".join(sorted(executor.loader.unmigrated_apps))) ) if target_app_labels_only: self.stdout.write( self.style.MIGRATE_LABEL(" Apply all migrations: ") + (", ".join(sorted({a for a, n in targets})) or "(none)") ) else: if targets[0][1] is None: self.stdout.write(self.style.MIGRATE_LABEL( " Unapply all migrations: ") + "%s" % (targets[0][0],) ) else: self.stdout.write(self.style.MIGRATE_LABEL( " Target specific migration: ") + "%s, from %s" % (targets[0][1], targets[0][0]) ) # @@ マイグレーション前のProjectStateを構成する # 恐らく適用済の範囲だけっぽい pre_migrate_state = executor._create_project_state(with_applied_migrations=True) pre_migrate_apps = pre_migrate_state.apps # @@ シグナルを投げる # 最終的にinject_rename_contenttypes_operationsが呼ばれる emit_pre_migrate_signal( self.verbosity, self.interactive, connection.alias, apps=pre_migrate_apps, plan=plan, ) # Run the syncdb phase. if run_syncdb: if self.verbosity >= 1: self.stdout.write(self.style.MIGRATE_HEADING("Synchronizing apps without migrations:")) self.sync_apps(connection, executor.loader.unmigrated_apps) # Migrate! if self.verbosity >= 1: self.stdout.write(self.style.MIGRATE_HEADING("Running migrations:")) # @@ 適用するものがなければメッセージ出すだけ if not plan: if self.verbosity >= 1: self.stdout.write(" No migrations to apply.") # If there's changes that aren't in migrations yet, tell them how to fix it. # @@ これは優しさ # もしmakemigrationsされてない変更があれば警告する autodetector = MigrationAutodetector( executor.loader.project_state(), ProjectState.from_apps(apps), ) changes = autodetector.changes(graph=executor.loader.graph) if changes: self.stdout.write(self.style.NOTICE( " Your models have changes that are not yet reflected " "in a migration, and so won't be applied." )) self.stdout.write(self.style.NOTICE( " Run 'manage.py makemigrations' to make new " "migrations, and then re-run 'manage.py migrate' to " "apply them." )) fake = False fake_initial = False else: fake = options['fake'] fake_initial = options['fake_initial'] # @@ migrateを実行する post_migrate_state = executor.migrate( targets, plan=plan, state=pre_migrate_state.clone(), fake=fake, fake_initial=fake_initial, ) # post_migrate signals have access to all models. Ensure that all models # are reloaded in case any are delayed. post_migrate_state.clear_delayed_apps_cache() post_migrate_apps = post_migrate_state.apps # Re-render models of real apps to include relationships now that # we've got a final state. This wouldn't be necessary if real apps # models were rendered with relationships in the first place. with post_migrate_apps.bulk_update(): model_keys = [] for model_state in post_migrate_apps.real_models: model_key = model_state.app_label, model_state.name_lower model_keys.append(model_key) post_migrate_apps.unregister_model(*model_key) post_migrate_apps.render_multiple([ ModelState.from_model(apps.get_model(*model)) for model in model_keys ]) # Send the post_migrate signal, so individual apps can do whatever they need # to do at this point. emit_post_migrate_signal( self.verbosity, self.interactive, connection.alias, apps=post_migrate_apps, plan=plan, )
def handle(self, *args, **options): self.verbosity = options.get('verbosity') self.interactive = options.get('interactive') # Import the 'management' module within each installed app, to register # dispatcher events. for app_config in apps.get_app_configs(): if module_has_submodule(app_config.module, "management"): import_module('.management', app_config.name) # Get the database we're operating from db = options.get('database') connection = connections[db] # If they asked for a migration listing, quit main execution flow and show it if options.get("list", False): warnings.warn( "The 'migrate --list' command is deprecated. Use 'showmigrations' instead.", RemovedInDjango110Warning, stacklevel=2) self.stdout.ending = None # Remove when #21429 is fixed return call_command( 'showmigrations', '--list', app_labels=[options['app_label']] if options['app_label'] else None, database=db, no_color=options.get('no_color'), settings=options.get('settings'), stdout=self.stdout, traceback=options.get('traceback'), verbosity=self.verbosity, ) # Hook for backends needing any database preparation connection.prepare_database() # Work out which apps have migrations and which do not executor = MigrationExecutor(connection, self.migration_progress_callback) # Before anything else, see if there's conflicting apps and drop out # hard if there are any conflicts = executor.loader.detect_conflicts() if conflicts: name_str = "; ".join( "%s in %s" % (", ".join(names), app) for app, names in conflicts.items() ) raise CommandError( "Conflicting migrations detected; multiple leaf nodes in the " "migration graph: (%s).\nTo fix them run " "'python manage.py makemigrations --merge'" % name_str ) # If they supplied command line arguments, work out what they mean. target_app_labels_only = True if options['app_label'] and options['migration_name']: app_label, migration_name = options['app_label'], options['migration_name'] if app_label not in executor.loader.migrated_apps: raise CommandError( "App '%s' does not have migrations." % app_label ) if migration_name == "zero": targets = [(app_label, None)] else: try: migration = executor.loader.get_migration_by_prefix(app_label, migration_name) except AmbiguityError: raise CommandError( "More than one migration matches '%s' in app '%s'. " "Please be more specific." % (migration_name, app_label) ) except KeyError: raise CommandError("Cannot find a migration matching '%s' from app '%s'." % ( migration_name, app_label)) targets = [(app_label, migration.name)] target_app_labels_only = False elif options['app_label']: app_label = options['app_label'] if app_label not in executor.loader.migrated_apps: raise CommandError( "App '%s' does not have migrations." % app_label ) targets = [key for key in executor.loader.graph.leaf_nodes() if key[0] == app_label] else: targets = executor.loader.graph.leaf_nodes() plan = executor.migration_plan(targets) run_syncdb = options.get('run_syncdb') and executor.loader.unmigrated_apps # Print some useful info if self.verbosity >= 1: self.stdout.write(self.style.MIGRATE_HEADING("Operations to perform:")) if run_syncdb: self.stdout.write( self.style.MIGRATE_LABEL(" Synchronize unmigrated apps: ") + (", ".join(executor.loader.unmigrated_apps)) ) if target_app_labels_only: self.stdout.write( self.style.MIGRATE_LABEL(" Apply all migrations: ") + (", ".join(set(a for a, n in targets)) or "(none)") ) else: if targets[0][1] is None: self.stdout.write(self.style.MIGRATE_LABEL( " Unapply all migrations: ") + "%s" % (targets[0][0], ) ) else: self.stdout.write(self.style.MIGRATE_LABEL( " Target specific migration: ") + "%s, from %s" % (targets[0][1], targets[0][0]) ) emit_pre_migrate_signal(self.verbosity, self.interactive, connection.alias) # Run the syncdb phase. if run_syncdb: if self.verbosity >= 1: self.stdout.write(self.style.MIGRATE_HEADING("Synchronizing apps without migrations:")) self.sync_apps(connection, executor.loader.unmigrated_apps) # Migrate! if self.verbosity >= 1: self.stdout.write(self.style.MIGRATE_HEADING("Running migrations:")) if not plan: executor.check_replacements() if self.verbosity >= 1: self.stdout.write(" No migrations to apply.") # If there's changes that aren't in migrations yet, tell them how to fix it. autodetector = MigrationAutodetector( executor.loader.project_state(), ProjectState.from_apps(apps), ) changes = autodetector.changes(graph=executor.loader.graph) if changes: self.stdout.write(self.style.NOTICE( " Your models have changes that are not yet reflected " "in a migration, and so won't be applied." )) self.stdout.write(self.style.NOTICE( " Run 'manage.py makemigrations' to make new " "migrations, and then re-run 'manage.py migrate' to " "apply them." )) else: fake = options.get("fake") fake_initial = options.get("fake_initial") executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial) # Send the post_migrate signal, so individual apps can do whatever they need # to do at this point. emit_post_migrate_signal(self.verbosity, self.interactive, connection.alias)
def handle(self, *args, **options): self.verbosity = options['verbosity'] self.interactive = options['interactive'] # Import the 'management' module within each installed app, to register # dispatcher events. for app_config in apps.get_app_configs(): if module_has_submodule(app_config.module, "management"): import_module('.management', app_config.name) # Get the database we're operating from db = options['database'] connection = connections[db] # Hook for backends needing any database preparation connection.prepare_database() # Work out which apps have migrations and which do not executor = MigrationExecutor(connection, self.migration_progress_callback) # Raise an error if any migrations are applied before their dependencies. executor.loader.check_consistent_history(connection) # Before anything else, see if there's conflicting apps and drop out # hard if there are any conflicts = executor.loader.detect_conflicts() if conflicts: name_str = "; ".join( "%s in %s" % (", ".join(names), app) for app, names in conflicts.items() ) raise CommandError( "Conflicting migrations detected; multiple leaf nodes in the " "migration graph: (%s).\nTo fix them run " "'python manage.py makemigrations --merge'" % name_str ) # If they supplied command line arguments, work out what they mean. run_syncdb = options['run_syncdb'] target_app_labels_only = True if options['app_label']: # Validate app_label. app_label = options['app_label'] try: apps.get_app_config(app_label) except LookupError as err: raise CommandError(str(err)) if run_syncdb: if app_label in executor.loader.migrated_apps: raise CommandError("Can't use run_syncdb with app '%s' as it has migrations." % app_label) elif app_label not in executor.loader.migrated_apps: raise CommandError("App '%s' does not have migrations." % app_label) if options['app_label'] and options['migration_name']: migration_name = options['migration_name'] if migration_name == "zero": targets = [(app_label, None)] else: try: migration = executor.loader.get_migration_by_prefix(app_label, migration_name) except AmbiguityError: raise CommandError( "More than one migration matches '%s' in app '%s'. " "Please be more specific." % (migration_name, app_label) ) except KeyError: raise CommandError("Cannot find a migration matching '%s' from app '%s'." % ( migration_name, app_label)) targets = [(app_label, migration.name)] target_app_labels_only = False elif options['app_label']: targets = [key for key in executor.loader.graph.leaf_nodes() if key[0] == app_label] else: targets = executor.loader.graph.leaf_nodes() plan = executor.migration_plan(targets) if options['plan']: self.stdout.write('Planned operations:', self.style.MIGRATE_LABEL) if not plan: self.stdout.write(' No planned migration operations.') for migration, backwards in plan: self.stdout.write(str(migration), self.style.MIGRATE_HEADING) for operation in migration.operations: message, is_error = self.describe_operation(operation, backwards) style = self.style.WARNING if is_error else None self.stdout.write(' ' + message, style) return # At this point, ignore run_syncdb if there aren't any apps to sync. run_syncdb = options['run_syncdb'] and executor.loader.unmigrated_apps # Print some useful info if self.verbosity >= 1: self.stdout.write(self.style.MIGRATE_HEADING("Operations to perform:")) if run_syncdb: if options['app_label']: self.stdout.write( self.style.MIGRATE_LABEL(" Synchronize unmigrated app: %s" % app_label) ) else: self.stdout.write( self.style.MIGRATE_LABEL(" Synchronize unmigrated apps: ") + (", ".join(sorted(executor.loader.unmigrated_apps))) ) if target_app_labels_only: self.stdout.write( self.style.MIGRATE_LABEL(" Apply all migrations: ") + (", ".join(sorted({a for a, n in targets})) or "(none)") ) else: if targets[0][1] is None: self.stdout.write(self.style.MIGRATE_LABEL( " Unapply all migrations: ") + "%s" % (targets[0][0],) ) else: self.stdout.write(self.style.MIGRATE_LABEL( " Target specific migration: ") + "%s, from %s" % (targets[0][1], targets[0][0]) ) pre_migrate_state = executor._create_project_state(with_applied_migrations=True) pre_migrate_apps = pre_migrate_state.apps emit_pre_migrate_signal( self.verbosity, self.interactive, connection.alias, apps=pre_migrate_apps, plan=plan, ) # Run the syncdb phase. if run_syncdb: if self.verbosity >= 1: self.stdout.write(self.style.MIGRATE_HEADING("Synchronizing apps without migrations:")) if options['app_label']: self.sync_apps(connection, [app_label]) else: self.sync_apps(connection, executor.loader.unmigrated_apps) # Migrate! if self.verbosity >= 1: self.stdout.write(self.style.MIGRATE_HEADING("Running migrations:")) if not plan: if self.verbosity >= 1: self.stdout.write(" No migrations to apply.") # If there's changes that aren't in migrations yet, tell them how to fix it. autodetector = MigrationAutodetector( executor.loader.project_state(), ProjectState.from_apps(apps), ) changes = autodetector.changes(graph=executor.loader.graph) if changes: self.stdout.write(self.style.NOTICE( " Your models have changes that are not yet reflected " "in a migration, and so won't be applied." )) self.stdout.write(self.style.NOTICE( " Run 'manage.py makemigrations' to make new " "migrations, and then re-run 'manage.py migrate' to " "apply them." )) fake = False fake_initial = False else: fake = options['fake'] fake_initial = options['fake_initial'] post_migrate_state = executor.migrate( targets, plan=plan, state=pre_migrate_state.clone(), fake=fake, fake_initial=fake_initial, ) # post_migrate signals have access to all models. Ensure that all models # are reloaded in case any are delayed. post_migrate_state.clear_delayed_apps_cache() post_migrate_apps = post_migrate_state.apps # Re-render models of real apps to include relationships now that # we've got a final state. This wouldn't be necessary if real apps # models were rendered with relationships in the first place. with post_migrate_apps.bulk_update(): model_keys = [] for model_state in post_migrate_apps.real_models: model_key = model_state.app_label, model_state.name_lower model_keys.append(model_key) post_migrate_apps.unregister_model(*model_key) post_migrate_apps.render_multiple([ ModelState.from_model(apps.get_model(*model)) for model in model_keys ]) # Send the post_migrate signal, so individual apps can do whatever they need # to do at this point. emit_post_migrate_signal( self.verbosity, self.interactive, connection.alias, apps=post_migrate_apps, plan=plan, )
def handle(self, *args, **options): self.verbosity = int(options.get('verbosity')) self.interactive = options.get('interactive') self.show_traceback = options.get('traceback') self.load_initial_data = options.get('load_initial_data') self.test_database = options.get('test_database', False) # Import the 'management' module within each installed app, to register # dispatcher events. for app_config in apps.get_app_configs(): if module_has_submodule(app_config.module, "management"): import_module('.management', app_config.name) # Get the database we're operating from db = options.get('database') connection = connections[db] # If they asked for a migration listing, quit main execution flow and show it if options.get("list", False): return self.show_migration_list(connection, args) # Work out which apps have migrations and which do not executor = MigrationExecutor(connection, self.migration_progress_callback) # Before anything else, see if there's conflicting apps and drop out # hard if there are any conflicts = executor.loader.detect_conflicts() if conflicts: name_str = "; ".join("%s in %s" % (", ".join(names), app) for app, names in conflicts.items()) raise CommandError( "Conflicting migrations detected (%s).\nTo fix them run 'python manage.py makemigrations --merge'" % name_str) # If they supplied command line arguments, work out what they mean. run_syncdb = False target_app_labels_only = True if len(args) > 2: raise CommandError( "Too many command-line arguments (expecting 'app_label' or 'app_label migrationname')" ) elif len(args) == 2: app_label, migration_name = args if app_label not in executor.loader.migrated_apps: raise CommandError( "App '%s' does not have migrations (you cannot selectively sync unmigrated apps)" % app_label) if migration_name == "zero": targets = [(app_label, None)] else: try: migration = executor.loader.get_migration_by_prefix( app_label, migration_name) except AmbiguityError: raise CommandError( "More than one migration matches '%s' in app '%s'. Please be more specific." % (app_label, migration_name)) except KeyError: raise CommandError( "Cannot find a migration matching '%s' from app '%s'." % (app_label, migration_name)) targets = [(app_label, migration.name)] target_app_labels_only = False elif len(args) == 1: app_label = args[0] if app_label not in executor.loader.migrated_apps: raise CommandError( "App '%s' does not have migrations (you cannot selectively sync unmigrated apps)" % app_label) targets = [ key for key in executor.loader.graph.leaf_nodes() if key[0] == app_label ] else: targets = executor.loader.graph.leaf_nodes() run_syncdb = True plan = executor.migration_plan(targets) # Print some useful info if self.verbosity >= 1: self.stdout.write( self.style.MIGRATE_HEADING("Operations to perform:")) if run_syncdb: self.stdout.write( self.style.MIGRATE_LABEL(" Synchronize unmigrated apps: ") + (", ".join(executor.loader.unmigrated_apps) or "(none)")) if target_app_labels_only: self.stdout.write( self.style.MIGRATE_LABEL(" Apply all migrations: ") + (", ".join(set(a for a, n in targets)) or "(none)")) else: if targets[0][1] is None: self.stdout.write( self.style.MIGRATE_LABEL(" Unapply all migrations: ") + "%s" % (targets[0][0], )) else: self.stdout.write( self.style.MIGRATE_LABEL( " Target specific migration: ") + "%s, from %s" % (targets[0][1], targets[0][0])) # Run the syncdb phase. # If you ever manage to get rid of this, I owe you many, many drinks. # Note that pre_migrate is called from inside here, as it needs # the list of models about to be installed. if run_syncdb: if self.verbosity >= 1: self.stdout.write( self.style.MIGRATE_HEADING( "Synchronizing apps without migrations:")) created_models = self.sync_apps(connection, executor.loader.unmigrated_apps) else: created_models = [] # Migrate! if self.verbosity >= 1: self.stdout.write( self.style.MIGRATE_HEADING("Running migrations:")) if not plan: if self.verbosity >= 1: self.stdout.write(" No migrations needed.") # If there's changes that aren't in migrations yet, tell them how to fix it. autodetector = MigrationAutodetector( executor.loader.graph.project_state(), ProjectState.from_apps(apps), ) changes = autodetector.changes(graph=executor.loader.graph) if changes: self.stdout.write( self.style.NOTICE( " Your models have changes that are not yet reflected in a migration, and so won't be applied." )) self.stdout.write( self.style.NOTICE( " Run 'manage.py makemigrations' to make new migrations, and then re-run 'manage.py migrate' to apply them." )) else: executor.migrate(targets, plan, fake=options.get("fake", False)) # Send the post_migrate signal, so individual apps can do whatever they need # to do at this point. emit_post_migrate_signal(created_models, self.verbosity, self.interactive, connection.alias)
def handle(self, *args, **options): self.verbosity = int(options.get('verbosity')) self.interactive = options.get('interactive') self.show_traceback = options.get('traceback') self.load_initial_data = options.get('load_initial_data') self.test_database = options.get('test_database', False) # Import the 'management' module within each installed app, to register # dispatcher events. for app_name in settings.INSTALLED_APPS: if module_has_submodule(import_module(app_name), "management"): import_module('.management', app_name) # Get the database we're operating from db = options.get('database') connection = connections[db] # If they asked for a migration listing, quit main execution flow and show it if options.get("list", False): return self.show_migration_list(connection, args) # Work out which apps have migrations and which do not executor = MigrationExecutor(connection, self.migration_progress_callback) # If they supplied command line arguments, work out what they mean. run_syncdb = False target_app_labels_only = True if len(args) > 2: raise CommandError("Too many command-line arguments (expecting 'appname' or 'appname migrationname')") elif len(args) == 2: app_label, migration_name = args if app_label not in executor.loader.migrated_apps: raise CommandError("App '%s' does not have migrations (you cannot selectively sync unmigrated apps)" % app_label) if migration_name == "zero": targets = [(app_label, None)] else: try: migration = executor.loader.get_migration_by_prefix(app_label, migration_name) except AmbiguityError: raise CommandError("More than one migration matches '%s' in app '%s'. Please be more specific." % (app_label, migration_name)) except KeyError: raise CommandError("Cannot find a migration matching '%s' from app '%s'. Is it in INSTALLED_APPS?" % (app_label, migration_name)) targets = [(app_label, migration.name)] target_app_labels_only = False elif len(args) == 1: app_label = args[0] if app_label not in executor.loader.migrated_apps: raise CommandError("App '%s' does not have migrations (you cannot selectively sync unmigrated apps)" % app_label) targets = [key for key in executor.loader.graph.leaf_nodes() if key[0] == app_label] else: targets = executor.loader.graph.leaf_nodes() run_syncdb = True plan = executor.migration_plan(targets) # Print some useful info if self.verbosity >= 1: self.stdout.write(self.style.MIGRATE_HEADING("Operations to perform:")) if run_syncdb: self.stdout.write(self.style.MIGRATE_LABEL(" Synchronize unmigrated apps: ") + (", ".join(executor.loader.unmigrated_apps) or "(none)")) if target_app_labels_only: self.stdout.write(self.style.MIGRATE_LABEL(" Apply all migrations: ") + (", ".join(set(a for a, n in targets)) or "(none)")) else: if targets[0][1] is None: self.stdout.write(self.style.MIGRATE_LABEL(" Unapply all migrations: ") + "%s" % (targets[0][0], )) else: self.stdout.write(self.style.MIGRATE_LABEL(" Target specific migration: ") + "%s, from %s" % (targets[0][1], targets[0][0])) # Run the syncdb phase. # If you ever manage to get rid of this, I owe you many, many drinks. # Note that pre_migrate is called from inside here, as it needs # the list of models about to be installed. if run_syncdb: if self.verbosity >= 1: self.stdout.write(self.style.MIGRATE_HEADING("Synchronizing apps without migrations:")) created_models = self.sync_apps(connection, executor.loader.unmigrated_apps) else: created_models = [] # Migrate! if self.verbosity >= 1: self.stdout.write(self.style.MIGRATE_HEADING("Running migrations:")) if not plan: if self.verbosity >= 1: self.stdout.write(" No migrations needed.") else: executor.migrate(targets, plan, fake=options.get("fake", False)) # Send the post_migrate signal, so individual apps can do whatever they need # to do at this point. emit_post_migrate_signal(created_models, self.verbosity, self.interactive, connection.alias)
class Migrator(object): """ Class to manage your migrations and app state. It is designed to be used inside the tests to ensure that migrations are working as intended: both data and schema migrations. This class can be but probably should not be used directly. Because we have utility test framework integrations for ``unitest`` and ``pytest``. Use them for better experience. """ def __init__( self, database: Optional[str] = None, ) -> None: """That's where we initialize all required internals.""" if database is None: database = DEFAULT_DB_ALIAS self._database: str = database self._executor = MigrationExecutor(connections[self._database]) def apply_initial_migration(self, targets: MigrationSpec) -> ProjectState: """Reverse back to the original migration.""" targets = normalize(targets) style = no_style() # start from clean database state sql.drop_models_tables(self._database, style) sql.flush_django_migrations_table(self._database, style) # prepare as broad plan as possible based on full plan self._executor.loader.build_graph() # reload full_plan = self._executor.migration_plan( self._executor.loader.graph.leaf_nodes(), clean_start=True, ) plan = truncate_plan(targets, full_plan) # apply all migrations from generated plan on clean database # (only forward, so any unexpected migration won't be applied) # to restore database state before tested migration return self._migrate(targets, plan=plan) def apply_tested_migration(self, targets: MigrationSpec) -> ProjectState: """Apply the next migration.""" self._executor.loader.build_graph() # reload return self._migrate(normalize(targets)) def reset(self) -> None: """ Reset the state to the most recent one. Notably, signals are not muted here to avoid https://github.com/wemake-services/django-test-migrations/issues/128 """ call_command('migrate', verbosity=0, database=self._database) def _migrate( self, migration_targets: MigrationSpec, plan: Optional[MigrationPlan] = None, ) -> ProjectState: with mute_migrate_signals(): return self._executor.migrate(migration_targets, plan=plan)
def migrate(self, app, to): migration = [(app, to)] executor = MigrationExecutor(connection) executor.migrate(migration) return executor.loader.project_state(migration).apps