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

Validate Your Social Security Number

Add common validations.

Subdomain validator

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

ValidatesTimeliness mongoid ORM compatability.

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

Find and report ActiveRecord validation errors.

validation_examples_matcher provides rspec matcher testing validations with examples.

Shows what a field expects before validation fails — complementary to ActiveModel errors.

Helper to customize the validation messages in Hanami application views.

A Validation framework for creating validation profiles, allowing for the separation & reuse of validation logic from the object being validated.

If you need a way to easily skip validations on some attributes and only in certain cases, this gem will allow you to do it in a clean and elegant way.

A extension activemodel's validations to validation step by step.