A Rails model validation, my first gem, just a practice work

Extra validations for rails: date, domain, email, iban, phone, postal_code, commerce_number, vat_number

Delegates validation between objects

A credit card validation library to check offline validity of any AMEX, Discover, MasterCard, Visa cards using length and Luhn algorithm.

Ruby Gem to make a validation of a variable or a hash, based on regular expressions or own pre-defined validation templates in an easy way. See full documentation on GitHub.

Ajax validation

A notifier for form validation errors.

Common validations for ActiveModel

Find and report ActiveRecord validation errors.

Use Validation for Email in ruby

Provides an extensible hook for adding custom html attributes to input elements based on validation rules defined in your model.

Validations for Argentinian specific information

Validations for CPF and CNPJ

Simple clean validation errors that can be used independently

DEV.ME API Documentation [Currency Conversion and Exchange Rates API](https://dev.me/products/currency) - [IP2Location, IP Country, IP Information API](https://dev.me/products/ip) - [Email Validation, Mailbox Verification](https://dev.me/products/email) - [Phone Number Validation](https://dev.me...

HTML Acceptance lets you accept warnings/errors. Less noisey validation will hopefully let you build html validation into your test suite, but break the rules if you must.

DecoLite is a little gem that allows you to use the provided DecoLite::Model class to dynamically create Decorator class objects. Use the DecoLite::Model class directly, or inherit from the DecoLite::Model class to create your own unique subclasses with custom functionality. DecoL...

Validation errors for logging

A simple gem that adds a validate_before method to Thor, allowing pre-command validations

The validation APIs help you validate data. Check if an E-mail address is real. Check if a domain is real. Check up on an IP address, and even where it is located. All this and much more is available in the validation API.