If you are using UUIDs as primary keys in your Rails application, you may find it tedious to specify them in every single migration. Fortunately, Rails provides a clean way to set this configuration globally so that all new tables use UUIDs automatically.

By adding a simple generator configuration to your config/application.rb, Rails will handle the primary key type for you. Inside your application class, define:

config.generators do |g|
  g.orm :active_record, primary_key_type: :uuid
end

With this setting in place, any time you generate a new model, Rails will create migrations that use UUIDs as the default primary key. This eliminates repetitive setup and ensures consistency across your database schema. It’s a small change that can save you time!