Recorder tracks changes of your Rails models

RecordFilter is a Pure-ruby criteria API for building complex queries in ActiveRecord. It supports queries that are built on the fly as well as named filters that can be added to objects and chained to create complex queries. It also gets rid of the nasty hard-coded SQL that shows up in most ActiveRecord code with a clean API that makes queries simple and intuitive to build.

Recursively delete all dependent model associations without an N + 1

Adds support in ActiveRecord for foreign_keys, complex indexes and other database-related stuff. Easily create foreign_keys, complex indexes and views.

Dump statistics from Redis to DB

A Redis-based version-addressable caching system. Memoize pure functions, aggregated database queries, and 3rd party API calls.

Store application and user settings on Redis. Comes with ActiveRecord support.

redshift-connector is a bulk data connector for Rails (ActiveRecord).

redshift_connector is a bulk data connector for Rails (ActiveRecord).

Admin interface for RubyOnRails projects inspired by Leaf CMS

A collection of RSpec matchers for web apps.

Connection proxy for ActiveRecord for leader / replica setups.

master-slave replication helper for ActiveRecord

Record your rack/rails requests and store them for future inspection

Rescues unique constraint violations and turns them into ActiveRecord errors

Provides a relational feature to your Rails application.

ResourceFull provides a fully-compliant ActiveResource server implementation built on ActionController. Additionally, it provides RESTful parameter queryability, paging, sorting, separation of controller concerns, multiple formats (HTML, XML, JSON), CRUD access permissions, and API metadata.

Enable send_later support for Resque

This gem provides two-way bindings between Salesforce records and records in an ActiveRecord-compatible database. It leans on the Restforce library for Salesforce API interactions, and provides a self-daemonizing binary which keeps records in sync by way of a tight polling loop.

Roles solution for active-record-backed Rails 3 applications