URI validation for ActiveModel

Validate the url format of an attribute.

A module that helps you to implement the Use Case design pattern

Rails ActiveModel gem to access Usergrid / Apigee App Services

validates that username is not included in reserved list.

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

A wrapper for the iMIS API.

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.

UUID Validator for ActiveModel

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

A CUIT/CUIL validator for ActiveModel & Rails with multiple customizable options

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

ActiveModel validation that two associated models are related to each other.