Rails:Migrations

Official Documentation

• https://guides.rubyonrails.org/active_record_migrations.html

Schema Migrations

Generate a Migration

Generic

# rails g migration <name>
rails g migration CreateCruds

Data Migrations

What if you need to do a data migration or data fix on existing data?

• https://thoughtbot.com/blog/data-migrations-in-rails
• https://github.com/dimroc/datafix