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)

Uses the power and familiarity of ActiveModel::Validations to validate hash structures. Designed for detecting and providing feedback on bad requests to your RESTful Web Service.

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.

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.

Find and report ActiveRecord validation errors.

validation_examples_matcher provides rspec matcher testing validations with examples.

Use reflection to spec ActiveModel validations

ActiveModel Interface for validation_reflection

A collection of common validation rules