Active Record and PostgreSQL — Ruby on Rails Guides

This guide covers PostgreSQL specific usage of Active Record. After reading this guide, you will know: How to use PostgreSQL's datatypes. How to use UUID primary keys. How to include non-key columns in indexes. How to use deferrable foreign keys. How to use unique constraints. How to implement exclusion constraints. How to implement full text search with PostgreSQL. How to back your Active Record

[hujuu]

“.create”

[suginoy]

このドキュメントって Guides のどこにリンクがあるんだろう？

[south37]

[postgresql]

[katsyoshi]

JSONだけじゃないのか