# Libraries

## Authentication

* [Devise](https://github.com/plataformatec/devise) - Flexible and modular authentication solution.
* [OmniAuth](https://github.com/omniauth/omniauth) - Flexible authentication solution for multi-provider auth (e.g. Sign in with GitHub or Google).

## Authorization

* [Pundit](https://github.com/varvet/pundit) - Minimal authorization through OO design and pure Ruby classes.

## ActiveJob

* [job-iteration](https://github.com/Shopify/job-iteration) - Make background jobs interruptible and resumable by design.

## Countries

* [countries](https://github.com/hexorx/countries) - All sorts of useful information about every country packaged as convenient little country objects. It includes data from ISO 3166 (countries and states/subdivisions ), ISO 4217 (currency), and E.164 (phone numbers).

## Payments

* [ActiveMerchant](https://github.com/activemerchant/active_merchant) - Payment abstraction library extracted from Shopify.

## Phones

* [phony\_rails](https://github.com/joost/phony_rails) - This Gem adds useful methods to your Rails app to validate, display and save phone numbers. It uses the super awesome Phony gem ([floere/phony](https://github.com/floere/phony)).

## Event-Driven Architecture

* [rails\_event\_store](https://github.com/RailsEventStore/rails_event_store) - A Ruby implementation of an Event Store based on Active Record.
* [sequent](https://github.com/zilverline/sequent) - CQRS & event sourcing framework for Ruby.
* [Eventide](https://eventide-project.org/) - Microservices, Autonomous Services, Service-Oriented Architecture, and Event Sourcing Toolkit for Ruby with Support for Event Store and Postgres.

## Enums

* [Enumerize](https://github.com/brainspec/enumerize) - Enumerated attributes with I18n and ActiveRecord/Mongoid/MongoMapper/Sequel support.

## Database

* [paranoia](https://github.com/rubysherpas/paranoia) - Overriding ActiveRecord `delete` and `destroy` to act as soft deletion.
* [scenic](https://github.com/scenic-views/scenic) - Versioned database views for Rails.
  * See also ["Effectively Using Materialized Views in Ruby on Rails"](https://pganalyze.com/blog/materialized-views-ruby-rails).

## Auditing

* [audited](https://github.com/collectiveidea/audited) - An ORM extension that logs all changes to your Rails models.
* [paper\_trail](https://github.com/paper-trail-gem/paper_trail) - Track changes to your models, for auditing or versioning. See how a model looked at any stage in its lifecycle, revert it to any version, or restore it after it has been destroyed.

## Localization

* [globalize](https://github.com/globalize/globalize) - Rails I18n de-facto standard library for ActiveRecord model/data translation.

## Forms

* [simple\_form](https://github.com/plataformatec/simple_form) - Forms made easy for Rails! It's tied to a simple DSL, with no opinion on markup. 

## Views

* [view\_component](https://github.com/github/view_component) - A framework for building reusable, testable & encapsulated view components in Ruby on Rails.

## PDF

* [wicked\_pdf](https://github.com/mileszs/wicked_pdf) - PDF generator (from HTML) plugin for Ruby on Rails.

## Monitoring

* [Bullet](https://github.com/flyerhzm/bullet) - Helps to kill N+1 queries and unused eager loading.

## Testing

* [shoulda-matchers](https://github.com/thoughtbot/shoulda-matchers) - Simple one-liner tests for common Rails functionality.
* [letter\_opener](https://github.com/ryanb/letter_opener) - Preview mail in the browser instead of sending.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://wiki.omar.engineer/programming-languages/ruby/ruby-on-rails/libraries.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.