Validations for making ActiveRecord objects immutable.

Validates IPv4 and IPv6 addresses

Rails plugin that provides a validates_ip_format_of method to ActiveRecord models. IPs are validated by regexp. IP validation. Validate IP.

Validates uniqueness of has_many children

ActiveModel validator that ensures Word-tags hasn't been accidentally pasted into WYSIWYG attributes.

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

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.

provides a simple way to validate hashes(params, json etc)

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.

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

Delegates validation between objects

A notifier for form validation errors.

Find and report ActiveRecord validation errors.