Active Record (>=3.0) plugin which allows you to hide and restore records without actually deleting them. Check its GitHub page for more in-depth information.

Lightweight state machine extracted from ActiveModel

Bit fields for ActiveRecord: This gem lets you use a single integer column in an ActiveRecord model to store a collection of boolean attributes (flags). Each flag can be used almost in the same way you would use any boolean attribute on an ActiveRecord object.

This gem allows you to easily use [Hashids](http://hashids.org/ruby/) in your Rails app. Instead of your models using sequential numbers like 1, 2, 3, they will instead have unique short hashes like "yLA6m0oM", "5bAyD0LO", and "wz3MZ49l". The database will still use integers under the hood, so this gem can be added or removed at any time.

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.

Rails observer (removed from core in Rails 4.0)

Search analytics made easy

ActiveRecord::JSONValidator makes it easy to validate JSON attributes with a JSON schema.

[DEPRECATION] 'attr_searchable' is deprecated. Migrate to 'search_cop' instead.

AutoStripAttributes helps to remove unnecessary whitespaces from ActiveRecord or ActiveModel attributes. It's good for removing accidental spaces from user inputs. It works by adding a before_validation hook to the record. It has option to set empty strings to nil or to remove extra spaces inside the string.

Rails I18n: de-facto standard library for ActiveRecord 3 model/data translation

Decorators on top of your ORM layer.

Operational controls for Active Job

Traditional username/password based authentication system for OmniAuth

Migrations and model helpers for creating and managing PostgreSQL 10 partitions

Add simple versioning to ActiveRecord models.

A build of acts_as_versioned, that works with rails 3.1.3

Useful tools to help construct database queries with ActiveRecord and Arel.

Send your application errors to our hosted service and reclaim your inbox.

A collection of lightweight, standardized, rails-oriented patterns.