Upknit

Adding this gem to a Rails application with PostgreSQL automatically enables UUID primary key.

Add this gem to your Rails application.

Add this line to your application's Gemfile:

gem 'upknit'

And then execute:

$ bundle

This gem does two things to enable UUID primary key.

1. Enable PostgreSQL's extension for calculation of UUID(v4).
2. Configure generators to use UUID
   • as primary key for newly generated tables.
   • as type of references.

The gem is available as open source under the terms of the MIT License.