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
Using PostgreSQL and jsonb with Ruby on Rails
PostgreSQL 9.4 introduced jsonb, a new column type for storing documents in your relational database. jsonb and json columns look exactly the same on a higher level, but differs on the storage implementation. The advantage of using jsonb is that you can easily integrate relational and non-relation data, with performance that can be better than most non-relational databases like MongoDB. Understand
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