Object validation library

NIS validation for ActiveModel

Some extra sensible validations

A very simple wrapper for the PostCodeAnywhere Bank Account Validation API.

Provides an easy way to add model-based validations to excel files.

A gem that handles your form and query validation in an elegant way.

Array validations for Rails (e.g. Postgres jsonb columns)

Calls and parses various maps APIs for accurate address validation and geocoding

JekyllFileWizard is a comprehensive gem designed to streamline the management and dynamic updating of Jekyll site structures. It automates the process of checking, creating, and updating various files in a Jekyll project, including HTML files, data files, and more. The gem offers features like dy...

UPS address validation gem

Auto generating ActiveModel validations for hashes

Provides Rails model services (such as validations) to non-ActiveRecord descendants.

Language Independent Validation Rules. Implements 2.0 specification

adds a uniqueness validator for globalize3 translated models

A Guilded (http://github.com/midas/guilded/tree/master) component that will reflect ActiveRecord validations and use them to live validate forms.

Little gem that take advantage of Roo gem and Rails ActiveModel validation methods to read and validate the content of a spreadsheet

A simple library for communicating with Apple's iTunes receipt validation server.

Provides subset validation for serialized arrays or sets in Active Record

Simple recaptcha plugin which allows to add reCAPTCHA validations to your forms

IbanValidation provides a simple ActiveModel::EachValidator for formally validating International Bank Account Numbers (IBAN). It is based on the IBANTools gem.