Schema-based validation and coercion for Ruby data structures, inspired by Prismatic/schema for Clojure.

A custom validation for your Active Model that check if an array is included in another one

Provides JSON Schema validation for ElasticGraph.

A Rails plugin that adds an ActiveRecord validation helper to do range and start/end date checking in.

Model.validates { presence_of :name }

Keep your code DRY by inferring column validations from table properties! Automagically validate presence, length, numericality, inclusion and uniqueness of ActiveRecord backed columns.

This gem preps a new Rails app with some of the best Rails gems and Jquery sweetness available( Twitter-Bootstrap, Devise, CanCan, Rails Admin, Spreadsheet, ) Not only does it takes care of the installation of these gems, it also extends your scaffolds to give aesthetically improved views. Furthe...

Ruby gem for runtime data validation and monitoring using the contracts approach.

IBAN + SWIFT/BIC: Information, Validation and Formatting.

This library helps validate attributes to specific types in the same way that ActiveModel valiations work. Able to chain additional modifiers to each validation.

A development toolkit for Ruby with several small/cohesive abstractions (monads, enums, business logic, data validation...) to empower your development workflow - It's totally free of dependencies.

A small wrapper around ActiveModel Validations.

Easily add Judge client side validation to your SimpleForm forms.

Handles application errors and model validations

Encapsulate form logic and validations in a simple object

Token validation for distributed resource servers

Headhunter is an HTML and CSS validation tool that injects itself into your Rails feature tests and automagically checks all your generated HTML and CSS for validity. In addition, it also looks out for unused (and therefore superfluous) CSS selectors.

ActiveModel validation that checks email addresses against a blacklist of trash-mail providers

Validate iTunes Transaction and Unified style receipts with local decoding and remote validation.

LHS ia a Rails-Gem, providing an ActiveRecord like interface to access HTTP-JSON-Services from Rails Applications. Special features provided by this gem are: Multiple endpoint configuration per resource, active-record-like query-chains, scopes, error handling, relations, request cycle cache, batc...