Gem Utilities for ISBN validation and Isbn Conversion

iTunes Receipt validation

iTunes Receipt validation library

jacaranda generates helper methods based on your model validations.

Json Schema Client is a Ruby client for JsonSchema with validation and hypermedia.

Validation of popular Polish codes, such as PESEL, NIP, REGON, post codes, car registration numbers, credit card numbers and anything really that can be helpful in advanced commercial application for Polish customers.

µValidator is a zero dependency validation library, which mimics ActiveModel::Error behaviour

Adds parameter validation and error control to interactor

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

Wrap validation conditions with a single command

Handle validation, coercion, and attributes.

Tiny plugin for MongoMapper to strip whitespace from strings before validation.

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

An ActiveModel extension that strips tags from attributes before validation using the strip-tags helper.

JSON Data Definition Format validation for Ruby

ActiveModel::Unvalidate provides a clean api for removing existing validations from models

MySQL constraints in migrations similiar to ActiveRecord validations