# a new column, model, etc. has been added before alembic revision --autogenerate -m '<describe your changes>' # review the migration in backend/feedback/alembic/versions # upgrade to the latest version alembic upgrade head
Make it a point to downgrade and upgrade whenever a change has a migration, to make sure nothing breaks.
Field length changes¶
Alembic doesn't detect field length changes by default, it's configuration has to be modified to detect it.
Alembic can make errors when using
context.configure(url=url, target_metadata=target_metadata, literal_binds=True, compare_type=True)