ActiveRecord: Simple filtering for html as validation.

Apply ActiveModel validations at a model instance level

Easily add Judge client side validation to your Formtastic forms.

Validations for ruby objects

Built for Developers. Ideal for MVPs, product ideation and validation.

Parsing, conversion, and validation for dates, phonetic names, and numbers.

NIS validation for ActiveModel

Some extra sensible validations

Provides validation methods for models in the LumberYard Sinatra app and command line application.

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

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

HasPhoneNumber makes validations for US phone numbers in ActiveRecord models easy.

An advance email validator. Checks format, MX record existence for email domain, and SMTP address validation.

Your favourite validations with Ruby

A collection of various validators for Rails forms

Allow for validation of only some attributes

Auto generating ActiveModel validations for hashes

Avoid sending plain text messages to API consumers by sending them more detailed information about validation errors.

Language Independent Validation Rules. Implements 2.0 specification

adds a uniqueness validator for globalize3 translated models