Sharding

Rails way to harness the power of SQL "EXISTS" statement

Subscribe to changes on ActiveRecord models

ActiveRecord/Rails Integration for the Workflow library. Workflow is a finite-state-machine-inspired API for modeling and interacting with what we tend to refer to as 'workflow'.

A smart sms verification tool

Simulate multi-table inheritance for activerecord models using a polymorphic association

Recursively traverse trees using a single SQL query

ActiveRecord Stand-alone migrations

Awesome patches backported for ActiveRecord MySQL adapters

MySQL index hint support for ActiveRecord

Rescue from MySQL and Sqlite duplicate errors

Rails ActiveRecord connector for Google Spanner Database

Directed Acyclic Graph hierarchy for Rail's ActiveRecord, supporting Rails 4.x

With Amountable, you can easily attach, organize and sum Ruby money fields to your models without migrating.

Oauth and OpenID made dead simple, added custom token settings for Facebook

Extension for ActiveRecord that adds support for PostgreSQL array columns, mapping string values to integers.

Restrict the values assignable to ActiveRecord attributes or associations

Oauth and OpenID made dead simple

Brainstem allows you to create rich API presenters that know how to filter, sort, and include associations.

Cucumber Factory allows you to create ActiveRecord models from your Cucumber features without writing step definitions for each model.