Scope ActiveModel validations

A extension activemodel's validations to validation step by step.

A collection of delicious Rails validators

contextual validations for controllers and wanna learn to do other stuff good too

ActiveModel validation for credit card number.

Your favourite validations with Ruby

Valid-env allows you to specify the environment variables that are required, those that are optional, and those that depend on one another, and will throw a useful error message immediately if something is missing.

VAT Identification Number data object and validator

VAT-ID validator based on ActiveModel::EachValidator

Vat number validator for Rails 3+ using vatlayer.com API

A Ruby wrapper library for veritrans Air Direct API

This Gem acts as an API Client for the VersaCommerce Theme API.

Auto generating ActiveModel validations for hashes

Interface for Pure-FTPd

Concerns to help manage attributes in View Components

Rails compatible view models

ViewSpec helps you develop, test and document the view layer of your Rails app using example-led specifications written in an expressive Ruby DSL.

Generates and validates Finnish national reference numbers (viitenumero).

Vim Script Package Manager based on pathogen.vim by Tim Pope

Provides VIN number validator for ActiveModel