What are Rails migrations and how does versioning work?

What are Rails migrations and how does versioning work?

Rails migrations are a way to modify your database schema over time in a consistent and easy manner. Versioning in migrations allows you to keep track of changes and roll back if necessary.

Can you explain how to create a migration in Rails?

Sure! You can create a migration using the command rails generate migration MigrationName. This will create a new migration file in the db/migrate directory.

How do I roll back a migration?

You can roll back a migration by running the command rails db:rollback. This will undo the last migration that was applied.

What happens if I have multiple migrations?

Rails applies migrations in the order they were created, based on their timestamp. Each migration is versioned, so you can manage them easily.