Асинхронная SQLAlchemy 2.0 | alembic миграции | Отношения между таблицами | Не FastAPI | Видео 3

Key Takeaways

• Alembic is essential for managing database schema changes, especially when working with asynchronous SQLAlchemy, as `Base.metadata.create_all` only creates new tables and cannot handle modifications.
• Alembic simplifies database migrations by automatically generating migration scripts, eliminating the need for manual SQL commands and reducing the risk of errors.
• The `alembic init` command sets up the necessary directory structure and configuration files for managing migrations within a project.
• Alembic supports different migration templates, including `generic` for standard migrations and `async` for asynchronous database operations.
• Migration scripts consist of `upgrade` and `downgrade` functions, where `upgrade` applies changes and `downgrade` reverts them, ensuring data integrity.
• For asynchronous operations, Alembic's `async` template generates an asynchronous `run_async_migrations` function that handles connections and executes migrations asynchronously.
• The `alembic revision -m "message"` command generates a new migration script with a unique ID and a descriptive message, facilitating version control.
• Customizing Alembic's configuration, such as the revision naming template, can improve the organization and readability of migration history.