never let an unscoped Model.all accidentally leak data to an unintended audience.

An awesome nested set implementation for Active Record

Create and modify your notifications through a simple API.

Integrates with your authentication solution to craft a personalized user notification platform.

A ruby library for working with the Open Archive Initiative Protocol for Metadata Harvesting (OAI-PMH)

use pagy for cursor-based pagination with rails

If you like the straight forward and effective nature of Strong Parameters and suspect that CanCan might be overkill for your project then you'll love Petergate's easy to use and read action and content based authorizations.

A Postgres advisory lock client

Amazon Redshift _makeshift_ adapter for ActiveRecord 4.

Adds missing native PostgreSQL data types to ActiveRecord and convenient querying extensions for ActiveRecord and Arel

Helps to save your eyes, when reading hardcore SQL requests in console

Adds the ability to pull random records from ActiveRecord

A modern fast tagging framework for Rails 3.1+

SchemaValidations extends ActiveRecord to automatically create validations by inspecting the database schema. This makes your models more DRY as you no longer need to duplicate NOT NULL, unique, numeric and varchar constraints on the model level.

State machine that allows dynamic transitions for business workflows

ActiveRecord has always stored the base class in polymorphic _type columns when using STI. This can have non-trivial performance implications in certain cases. This gem adds the 'store_base_sti_class' configuration option which controls whether ActiveRecord will store the base class or the actual class. Defaults to true for backwards compatibility.'

Sharding

Introspects your database string field maximum lengths and automatically defines length validations.

Rails way to harness the power of SQL "EXISTS" statement

Subscribe to changes on ActiveRecord models