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.

Migrate large tables without downtime by copying to a temporary table in chunks. The old table is not dropped. Instead, it is moved to timestamp_table_name for verification.

Migrate large tables without downtime by copying to a temporary table in chunks. The old table is not dropped. Instead, it is moved to timestamp_table_name for verification.

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.

Prometheus metric collector and exporter for Ruby

Alchemy is a powerful, userfriendly and flexible Rails CMS.

Automatically eager loads Rails associations as associations are traversed

ranked-model is a modern row sorting library built for Rails 4.2+. It uses ARel aggressively and is better optimized than most other libraries.

Attach comments to your ActiveRecord queries.

Overrides some basic methods for the current model so that calling #destroy sets a 'deleted_at' field to the current timestamp. ActiveRecord is required.

Identify database issues before they hit production.

Provides simple way to integrate regression test selection approach to your RSpec test suite

Adds helpers to migrations and dumps foreign keys to schema.rb

Advisory locking for ActiveRecord

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.

ActiveRecord instrumentation for the OpenTelemetry framework

Monitors Ruby apps and reports detailed metrics on performance to Scout.

Extension to ActiveRecord::Base for validating hostnames

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.

lol_dba is a small package of rake tasks that scan your application models and displays a list of columns that probably should be indexed. Also, it can generate .sql migration scripts.