Allow for validation of only some attributes

A collection of various validators for Rails forms

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

ActiveRecord model validation against stopforumspam.com (Rails 3)

W3C Validators is a Ruby wrapper for the World Wide Web Consortium's online validation services.

Defined hashlike objects, with validations. For simple schema definitions and checking they're followed

WIP!!! escher sign and validation for faraday http rest client

Framecurve parser, validation and interpolation

Apply ActiveModel validations at a model instance level

Built for Developers. Ideal for MVPs, product ideation and validation.

A very simple wrapper for the PostCodeAnywhere Bank Account Validation API.

Auto generating ActiveModel validations for hashes

adds a uniqueness validator for globalize3 translated models

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.

Make it easy to use handles (callsigns/monikers/usernames) in URLs, even if they might be blank. Provides sensible validations and a find_by_id_or_handle method.