How can I use Flask-Migrate for advanced database migrations?

How can I use Flask-Migrate for advanced database migrations?

Flask-Migrate is an extension that handles SQLAlchemy database migrations for Flask applications. For advanced usage, you can customize migration scripts, manage multiple databases, and use Alembic commands directly.

Can you show me how to create a custom migration script?

Sure! You can create a custom migration script by using the flask db migrate -m "Your message here" command. This generates a new migration file in the migrations folder.

What if I need to downgrade my database?

You can downgrade your database using the command flask db downgrade <revision>, where <revision> is the identifier of the migration you want to revert to.

Is it possible to manage multiple databases with Flask-Migrate?

Yes, you can manage multiple databases by configuring each database in your Flask app and using the --database option with the migration commands.