Include ActiveRecord::Immutable in your ActiveRecord models to make your tables append-only.

Pass control of Active Record methods to a dedicated object.

Attribute inheritance for AR associations

Specify columns like you would with ActiveRecord migrations and then run .auto_upgrade! Based on the mini_record gem from Davide D'Agostino, it adds fewer aliases, doesn't create timestamps and relationship columns automatically.

Fork of the ActiveRecord JDBC adapter with support for SQL Server and Azure SQL, for more information and help look at the README file in the github repository. AR-JDBC is a database adapter for Rails' ActiveRecord component designed to be used with JRuby built upon Java's JDBC API for database a...

Install this gem to use AS/400 with JRuby on Rails.

This is a fork of ActiveRecord SQL Server Adapter for JRuby. SQL Server 2012 and upward.

Install this gem and require 'teradata' with JRuby on Rails.

A useful ActiveRecord extension to handle columns containing large amounts of data

Something with the combination of Rails 3.1, Mysql2 0.3.x, Capybara, Selenium/Webkit/etc causes Mysql to raise exceptions where the connection is waiting on a result. This gem provides an auto-retry capability with the Mysql2Adapter to retry any query execution up to 5 times. Thi...

An ActiveRecord adapter for MySQL, based on mysql gem.

An ActiveRecord extension for enabling SQL_CACHE and SQL_NO_CACHE in MySQL queries

Adds a :uuid column to ActiveRecord MySQL2 Adapter. Store UUIDs as 16 bytes binary column.

It is a library that performs extended verification when an error occurs when executing SQL.

Implements the Null Object Pattern for nil values in ActiveRecord associations.

PostgreSQL PGCrypto support for ActiveRecord models.

Several extensions to ActiveRecord's PostgreSQLAdapter.

Allows polymorphic loading of has_many through objects

This gem adds support to the ActiveRecord (3.x and 4.x) for composite types.

citext support for rails