Log all changes to your ActiveRecord models

XML serialization for your Active Model objects and Active Record models - extracted from Rails

An awesome nested set implementation for Active Record

Clearance is built to support authentication and authorization via an email/password sign-in mechanism in applications. It provides some core classes commonly used for these features, along with some opinionated defaults - but is intended to be easy to override.

ActiveRecord backend for Delayed::Job, originally authored by Tobias Lütke

A simple, fast, memory-efficient and threadsafe implementation of GetText

Seed Fu is an attempt to once and for all solve the problem of inserting and maintaining seed data in a database. It uses a variety of techniques gathered from various places around the web and combines them to create what is hopefully the most robust seed data system around.

Shrine is a toolkit for file attachments in Ruby applications. It supports uploading, downloading, processing and deleting IO objects, backed by various storage engines. It uses efficient streaming for low memory usage. Shrine comes with a high-level interface for attaching uploaded files to database records, saving their location and metadata to a database column, and tying them to record's lifecycle. It natively supports background jobs and direct uploads for fully asynchronous user experience.

Adds support for creating state machines for attributes on ActiveRecord

Rails I18n de-facto standard library for ActiveRecord model/data translation.

Easy activity tracking for your ActiveRecord models. Provides Activity model with details about actions performed by your users, like adding comments, responding etc.

This gem allows you to use sharded databases with ActiveRecord. This also provides a interface for replication and for running migrations with multiples shards.

A resource-centric approach to implementing the controllers, routes, and serializers needed to support the JSON API spec.

Apartment allows Rack applications to deal with database multitenancy through ActiveRecord

Simple testing of Sidekiq jobs via a collection of matchers and helpers

PgSearch builds Active Record named scopes that take advantage of PostgreSQL's full text search

An Action Dispatch session store backed by an Active Record class.

Some [hopefully] useful extensions to Ruby's String class. Stringex is made up of three libraries: ActsAsUrl [permalink solution with better character translation], Unidecoder [Unicode to ASCII transliteration], and StringExtensions [miscellaneous helper methods for the String class].

Rake tasks to migrate data alongside schema changes.

Allows marking ActiveRecord objects as discarded, and provides scopes for filtering.