Presence at least one validation for ActiveModel

Set of rich helpers for email validation

A Domain Specific Language for Validations written in pure Ruby.

Build UI tests for manual validation across multiple devices.

Provides parsing, validation & accessors

Automatically pass attributes through Sanitize before validation

A schema parsing and validation library for Ruby

Helpful rspec matchers for testing validations and associations.

Extra validations for Scrivener.

Integrates sequel validations and sequel hooks into couchbase model.

PORO validation mixin with no deps

simple validation

Param checker adds a before filter for each api to do the validation

Easy validation and processing of Paypal IPN payments

Adds new validations to AR

WADL validator for requests

Description of StrongestValidations.

Tripwire captures validation errors from your Ruby on Rails application to help you identify and fix user experience issues. The TripwireNotifier gem makes it easy to hook up your app to the Tripwire web service.

Flexible and modular validations for ActiveRecord models

This Gem is Used for Validations URLs