Sharding

Introspects your database string field maximum lengths and automatically defines length validations.

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

Subscribe to changes on ActiveRecord models

Backported from Rails 5.0 to use with 4.x versions

Recursively traverse trees using a single SQL query

ActiveRecord Stand-alone migrations

Awesome patches backported for ActiveRecord MySQL adapters

It is the library to reconnect automatically when ActiveRecord is disconnected from MySQL.

This gem enables your model to query the database using the earthdistance extension. This should be much faster than using trigonometry functions over standart indexs.

Rails ActiveRecord connector for Google Spanner Database

This gem is only needed before Rails 7.1, where the trilogy adapter is built in. When you upgrade to a version after 7.1.a, replace this with `gem "trilogy"` to ensure that trilogy itself is available.

Dead simple snapshot versioning for ActiveRecord models and associations.

Simple tagging gem for Rails using postgres array.

Plugin for running methods on ActiveRecord models after record is committed

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

Multidb is an ActiveRecord extension for switching between multiple database connections, such as primary/replica setups.

Oauth and OpenID made dead simple

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