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MixIn used to extend ActiveRecord::Base classes implementing bulk insert and update operations through {#create_many} and {#update_many}.

Auto corrector for N+1 queries detected at runtime with Bullet.

Store the version of any class for cache invalidation

Imagine you have an Account model which has many transactions. calculable_attrs gem allows you to define Account#balance as SUM(transactions.amount) directly in your Account model. And solves n+1 problem for you in an elegant way.

Extends CanCan with dynamic, inheritable permissions stored in a database, with caching and multi-tenant refinements

Validate carrierwave uploads are virus free with clamav.

Asynchronously LISTEN for Postgresql NOTIFY messages with payloads and Do Something

An Active Record extension to provide state callbacks

Simple ActiveRecord audit system

ChronoForge provides a robust framework for building durable, distributed workflows in Ruby on Rails applications. It offers reliable state management, error recovery, and workflow orchestration through features like durable execution, wait states, and comprehensive error tracking.

circuit_switch is a gem for 'difficult' application. This switch helps to make changes easier and deploy safely.

For Rails applications - add creator and updater to your ActiveRecord models and automatically set these from current_user See the README on github for more info

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An ActiveRecord plugin to strip whitespace from strings and coerce empty strings to nil values on assignment.

Add comment support for ActiveRecord models.

ComputedModel is a helper for building a read-only model (sometimes called a view) from multiple sources of models. It comes with batch loading and dependency resolution for better performance. It is designed to be universal. It's as easy as pie to pull data from both ActiveRecord and remote server (such as ActiveResource).

Give condition when to increment/decrement counter cache.

Consent permission based authorization

Consort allows you to define relationships between various ORM/ODMs and access them similarly to ActiveRecord associations.