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Official Documentation

Database Types

For list of (postgres) column types, see:

Schema Migrations

Generate a Migration


# rails g migration <name>
rails g migration CreateCruds

Run the Migration

# Run new migrations
rails db:migrate

# Don't forget to test rollbacks on new migrations
rails db:rollback STEP=1

Data Migrations

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