Rails:Migrations
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Contents
Official Documentation
Database Types
For list of (postgres) column types, see:
- https://stackoverflow.com/q/17918117/1093087
- https://github.com/rails/rails/blob/master/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb (See NATIVE_DATABASE_TYPES)
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?