Easy client side validation for your ActiveRecord models

Valcro is a validation library for arbitrary ruby objects. I's primary goal is to remain as simple as possible so that it can be useful to a large surface of use cases remaining easily extensible.

This plugin adds extra validations to a host.

ActiveRecord Tablefree Models provides a simple mixin for creating models that are not bound to the database. This approach is useful for taking advantage of the features of ActiveRecord such as validation, relationships, nested_attributes, etc.

pure ruby PNG file manipulation & validation

GTIN provides basic validation, checksum and conversion functionality for UPC, EAN and GTIN barcode values.

Validate your ActiveRecord models on the client, showing their error and success messages by providing a validation controller.

Rails Devs For Data Integrity catches unique key and foreign key violations coming from the MySQLdatabase and converts them into an error on the ActiveRecord object similar to validation errors

FlowChat is a Rails framework for building sophisticated conversational interfaces across USSD and WhatsApp platforms. Create interactive flows with menus, prompts, validation, media support, and session management. Features include multi-tenancy, background job processing, built-in simulator f...

A Ruby library for talking to the HMRC Government Gateway. This provides a builder for creating classes that can generate the XML needed complete with type information and runtime validation.

Allows testing vor valid html (including html5) and css. In addition you can configure the gem to use a locally installed validation service instead of the online w3c servers

Provides Rails model services (such as validations) to non-ActiveRecord descendants.

Europe is a simple library for retrieving EU government data such as VAT information, VAT validation, currency exchange rates and country information.

When IBAN validation is not enough

DB constraints in migrations similiar to ActiveRecord validations. Core classes

Gem includes validations, card brand detection method, etc.

Standalone PORO assertions and validations

This code is meant to be used by developers who are attempting to build web applications on AWS but wish to run client-side testing and validation.

Rack parameter validation and type coercion.

Provides client side validations for forms with the http://formvalidation.io/ library.