ActiveRecord SQL Server Adapter. SQL Server 2012 and upward.

AR-JDBC is a database adapter for Rails' ActiveRecord component designed to be used with JRuby built upon Java's JDBC API for database access. Provides (ActiveRecord) built-in adapters: MySQL, PostgreSQL and SQLite3 as well as adapters for popular databases such as Oracle, SQLServer, DB2, FireBird and even Java (embed) databases: Derby, HSQLDB and H2. It allows to connect to virtually any JDBC-compliant database with your JRuby on Rails application.

A database backend that translates database interactions into no-ops. Using NullDB enables you to test your model business logic - including after_save hooks - without ever touching a real database.

MySQL JDBC adapter for JRuby on Rails.

Postgres JDBC adapter for JRuby on Rails.

Derby JDBC adapter for JRuby on Rails.

Oracle "enhanced" ActiveRecord adapter contains useful additional methods for working with new and legacy Oracle databases. This adapter is superset of original ActiveRecord Oracle adapter.

An ActiveRecord ODBC adapter

Active Record adapter for https://github.com/trilogy-libraries/trilogy.

This gem includes several enhancements and customizations to the standard ActiveRecord Oracle Enhanced adapter, which is still required. Any customizations to this adapter's behaviour or additional Oracle-specific utilities should be added here.