How do I create a migration in Rails?

How do I create a migration in Rails?

To create a migration in Rails, you can use the command rails generate migration MigrationName. Replace MigrationName with a descriptive name.

What if I want to add a column to an existing table?

You can create a migration to add a column by using the command rails generate migration AddColumnNameToTableName column_name:data_type. For example, rails generate migration AddAgeToUsers age:integer.

How do I run the migration after creating it?

After creating the migration, run rails db:migrate to apply the changes to your database.

Can I roll back a migration?

Yes, you can roll back the last migration by running rails db:rollback. You can specify steps if needed.