Object validation inspired by RSpec.

Simple DSL for datatype validation for basic data types.Inspired from GRPC DSL. Since ruby is dynamic language, datatype validator helps to reduce runtime errors by validating structure before processing

Library to parse X12 messages and manipulate their loops, segments, fields, composites, and validation tables.

YAML files loader with validation

Simple validation library with virtus integration

Brazilian zipcode validations for ActiveRecord, integrated with correios-cep gem.

ActiveRecord model validation against stopforumspam.com (Rails 3)

IAP and IAB receipt validation module.

Auto generating ActiveModel validations for hashes

Language Independent Validation Rules. Implements 2.0 specification

adds a uniqueness validator for globalize3 translated models

A Guilded (http://github.com/midas/guilded/tree/master) component that will reflect ActiveRecord validations and use them to live validate forms.

Little gem that take advantage of Roo gem and Rails ActiveModel validation methods to read and validate the content of a spreadsheet

This gem wraps the guards.js jQuery validation library as a Rails asset gem.

This gem provides immutability validation. This is different from `readonly: true` stuff because it sets the error.

rack-oidc-api provides a JWT validation middleware which automatically discovers the settings supported by a given OIDC provider, and validates the token against the published keys.

Use the ActiveRecord mimicking API to write into CM and enjoy all the benefits of callbacks, validations and permission checking

PIC is a pattern matching library, like regular expressions, based on Cobol edited pictures. It's advantage over regular expressions is it more concise syntax which geared specifically toward validation of user input.

iTunes In-App Purchase and Subscription Receipt Analysis and Validation

This is useful when you want to define optional validations for a resource and keep it valid.