dstandish opened a new issue, #49570:
URL: https://github.com/apache/airflow/issues/49570
### Body
traceback
```
Traceback (most recent call last):
File "/Users/dstandish/code/airflow/.venv/bin/airflow", line 10, in
<module>
sys.exit(main())
File "/Users/dstandish/code/airflow/airflow-core/src/airflow/__main__.py",
line 55, in main
args.func(args)
File
"/Users/dstandish/code/airflow/airflow-core/src/airflow/cli/cli_config.py",
line 48, in command
return func(*args, **kwargs)
File
"/Users/dstandish/code/airflow/airflow-core/src/airflow/utils/cli.py", line
111, in wrapper
return f(*args, **kwargs)
File
"/Users/dstandish/code/airflow/airflow-core/src/airflow/utils/providers_configuration_loader.py",
line 55, in wrapped_function
return func(*args, **kwargs)
File
"/Users/dstandish/code/airflow/airflow-core/src/airflow/cli/commands/db_command.py",
line 206, in downgrade
run_db_downgrade_command(args, db.downgrade, _REVISION_HEADS_MAP)
File
"/Users/dstandish/code/airflow/airflow-core/src/airflow/cli/commands/db_command.py",
line 181, in run_db_downgrade_command
command(to_revision=to_revision, from_revision=from_revision,
show_sql_only=args.show_sql_only)
File
"/Users/dstandish/code/airflow/airflow-core/src/airflow/utils/session.py", line
101, in wrapper
return func(*args, session=session, **kwargs)
File "/Users/dstandish/code/airflow/airflow-core/src/airflow/utils/db.py",
line 1234, in downgrade
_offline_migration(command.downgrade, config=config,
revision=revision_range)
File "/Users/dstandish/code/airflow/airflow-core/src/airflow/utils/db.py",
line 1015, in _offline_migration
migration_func(config, revision, sql=True)
File
"/Users/dstandish/code/airflow/.venv/lib/python3.9/site-packages/alembic/command.py",
line 453, in downgrade
script.run_env()
File
"/Users/dstandish/code/airflow/.venv/lib/python3.9/site-packages/alembic/script/base.py",
line 586, in run_env
util.load_python_file(self.dir, "env.py")
File
"/Users/dstandish/code/airflow/.venv/lib/python3.9/site-packages/alembic/util/pyfiles.py",
line 95, in load_python_file
module = load_module_py(module_id, path)
File
"/Users/dstandish/code/airflow/.venv/lib/python3.9/site-packages/alembic/util/pyfiles.py",
line 113, in load_module_py
spec.loader.exec_module(module) # type: ignore
File "<frozen importlib._bootstrap_external>", line 850, in exec_module
File "<frozen importlib._bootstrap>", line 228, in
_call_with_frames_removed
File
"/Users/dstandish/code/airflow/airflow-core/src/airflow/migrations/env.py",
line 136, in <module>
run_migrations_offline()
File
"/Users/dstandish/code/airflow/airflow-core/src/airflow/migrations/env.py",
line 94, in run_migrations_offline
context.run_migrations()
File "<string>", line 8, in run_migrations
File
"/Users/dstandish/code/airflow/.venv/lib/python3.9/site-packages/alembic/runtime/environment.py",
line 946, in run_migrations
self.get_context().run_migrations(**kw)
File
"/Users/dstandish/code/airflow/.venv/lib/python3.9/site-packages/alembic/runtime/migration.py",
line 623, in run_migrations
step.migration_fn(**kw)
File
"/Users/dstandish/code/airflow/airflow-core/src/airflow/migrations/versions/0028_3_0_0_drop_ab_user_id_foreign_key.py",
line 83, in downgrade
if table_exists("ab_user"):
File
"/Users/dstandish/code/airflow/airflow-core/src/airflow/migrations/versions/0028_3_0_0_drop_ab_user_id_foreign_key.py",
line 43, in table_exists
inspector = inspect(op.get_bind())
File
"/Users/dstandish/code/airflow/.venv/lib/python3.9/site-packages/sqlalchemy/inspection.py",
line 64, in inspect
ret = reg(subject)
File
"/Users/dstandish/code/airflow/.venv/lib/python3.9/site-packages/sqlalchemy/engine/reflection.py",
line 178, in _connectable_insp
return Inspector._construct(Inspector._init_legacy, bind)
File
"/Users/dstandish/code/airflow/.venv/lib/python3.9/site-packages/sqlalchemy/engine/reflection.py",
line 117, in _construct
init(self, bind)
File
"/Users/dstandish/code/airflow/.venv/lib/python3.9/site-packages/sqlalchemy/engine/reflection.py",
line 124, in _init_legacy
self._init_engine(bind)
File
"/Users/dstandish/code/airflow/.venv/lib/python3.9/site-packages/sqlalchemy/engine/reflection.py",
line 128, in _init_engine
engine.connect().close()
AttributeError: 'MockConnection' object has no attribute 'close'
~/code/airflow simplify-migration-re-dag-versions-etc*
.venv ❯ airflow db downgrade --to-revision 5f2621c13b39 --show-sql-only
````
### Committer
- [x] I acknowledge that I am a maintainer/committer of the Apache Airflow
project.
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