Validate an email address using RFC 822 pattern match regex regular expressions

Basic document validation

The Wechat Validator engine handles the Wechat server validation requests. 微信验证器引擎处理微信服务器的验证请求。

A simple js form validation

Checksum validation for New Zealand IRD numbers. See http://www.ird.govt.nz/how-to/irdnumbers/ for details of what an IRD is.

RailsRestKit provides a comprehensive solution for building RESTful Rails controllers with minimal boilerplate. It automatically generates standard CRUD actions (index, show, new, create, edit, update, destroy) with built-in lifecycle callbacks and validation states (valid/invalid). The gem inclu...

Tiny implementation of the command pattern, including input validation, using Scrivener.

ActiveRecord Tableless provides a simple mixin for creating models that are not bound to the database. This approach is mostly useful for capitalizing on the features ActiveRecord::Validation

email validation

Simple actions and complex forms with validations, nesting, etc.

YAML Easy Schemas it a straight-foward but powerful YPath-based schema format and validation program for YAML documents.

Simple YML validation

Library for validation of czech bank account numbers

Provides a simple way to define a configuration with validation

Tools to help validate web pages. Gathers validation results from multiple sources, providing a single interface for both requests and responses.

This gem will take care of scopes, validations and normalization

Instead of scattering validations, strong parameters, and business rules across controllers and models, changesets give you one clear pipeline for handling data before it touches the database.

validate-response is a gem for bringing error messages from one or more ActiveRecord objects to the unified structure & highlight validation errors in forms (ajax supported).

Bailitheoir is a JavaScript that you can insert into your pages to ensure that the browser will implement form input validation.

Failfast mode for ActiveModel::EachValidator