A method construction and validation toolkit.

Methodic : provide Hash table options arguments manager (specifications and validations

MinHTTP allows one to send and receive raw HTTP requests. It's a very thin wrapper around EventMachine's connect method with some SSL validation added.

Provides data class validation for active-model objects

Adds the association and validation macros for Rspec in the same way Shoulda does for ActiveRecord.

JSON Data Definition Format validation for Ruby

This gem covers the generation and validation of the Portuguese Fiscal Code (or NIF). It also includes a rails custom validator.

numberjack validation lib

Shared CarrierWave and Validations and Configurations

[Deprecated] Flexible, Easy Function Parameters with Validation.

Validation errors explanation done in good way for Padrino framework.

A TOTP generator, that includes validation, generation and send methods. See https://github.com/fboccacini/onetime-totp for reference and usage.

DSL for method arguments validation and casting

Client side validation with parsley and simple_form.

PDF/A Validation using Apache PDFbox

Postcode validation module

Presence at least one validation for ActiveModel

FullMetalBody is an input validation tool for ruby on rails.

An ActiveModel extension that automatically converts all non-English digits to English digits before validation. https://github.com/aalyahya/normalize_digits

expose presence-validation in a more controller-friendly manner