Validate specific value for Rails

Validate phone numbers against E.164 format with this Ruby on Rails gem

Validate against blacklist of words

Add to Rails the possibility to validate the quantity of an associate model

Validates mexican RFC and test it with matchers in a simple way.

Validate Your Social Security Number

Add common validations.

Subdomain validator

This library helps validate that an attribute is a subset of a specified set

Validates Telephone for Brazil and United States and test it with matchers in a simple way.

ValidatesTimeliness mongoid ORM compatability.

Makes boolean validations a little cleaner.

Parse numbers suffixed with mangitude specifiers and/or abbreivations.

Library for validating unchangeable attributes.

Validates if an attribute has a valid xml content or a xsd valid content.

Validate XML against it's embedded XSI elements that define the XSD's.

Adds validation methods considering different country zip code formats. Currently, we can validate 130 countries.

With this gem you will have several validations that are common on day day and that will make life much easier for dev. Validations can be returned in a simple and standardized way..

Delegates validation between objects

A notifier for form validation errors.