This validator allows you to verify nested models created with nested forms to validate the uniqueness of an attribute, More details in http://github.com/evedovelli/unique_nested_validator

Unite provides extensions to your objects to support values with units

Unity provides extensions to your objects to support values with units

A Rails adaptor that encapsulate measurements and their units in Ruby on Rails.

A minimal endpoint for driving server-side validations from a remote UI

A UOB Payroll File Generator

A sustainable architecture for Ruby on Rails.

Library for validating urls in Rails

Validate the url format of an attribute.

Usine (french word for factory) is a wrapper around factory_girl for Trailblazer’s operations.

UUID attribute for ActiveRecord

uuid_v7 enables UUID V7 as primary keys in Rails, optimized for Mysql and Sqlite, with efficient migration and integration features.

Provides a set of additional Git commands to help developers when working with Pivotal Tracker

Rails 3 awesome custom validators

Validacity adds an extra layer of validation objects where all your validation logic can be moved to.

Validates Cnpj

Validates CPF

Simple gem helpful in validating standard credit card forms

Use ActiveModel to validate arguments for any Ruby method

Adds validates_associated_with_context to models to validate associated models with validation context