A simple gem for email validation.

EachValidator that adds a parent model's association's validation errors to the parent model

An ActiveModel validator utilizing the built in URI parse methods to provide a rich semantic API for URI validation

Allows one to implement object validations without writing too much code

Rails gem that implements an ActiveRecord validation helper called validates_as_phone_number which validates U.S. phone numbers

Validations for making ActiveRecord objects immutable.

The beginning of a validation library

Valvat_cache caches in a json file results of the VIES validation keeping it a couple of weeks

This gem unions a server-side ActiveModel password strength validation plugin with a client-side password strength estimation

Adds validation methods considering different country zip code formats. Currently, we can validate 130 countries.

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

== FEATURES/PROBLEMS: Right now, only one function: parse. This does the validation and parsing all in one step. This is intended to be used by any reader (who would take care of what links have been read, etc). == SYNOPSIS: results = Zsff.parse(url) results[:errors] #Any errors encountered ...

Adds URL validation to your Grape API parameters.

A gem for id and passport validation.

Language Independent Validation Rules

A JSON schema validation tool.

add description to your classes and make your ActiveRecord validations smarter

Params validations for Ruby on Rails