Simple gem helpful in validating standard credit card forms

Validate HTML files as they leave your app by rack or by mail or by turbo-stream

Email validator that hits freemium providers one by one and returns normalized response.

Inspired by Airbnb blog post https://medium.com/airbnb-engineering/large-scale-payments-systems-and-ruby-on-rails-bfe5b89f6f4 - by including a module in any of your classes, you can validate the type and presence of a method's parameters.

Validates the given string

Validates a NZ bank account against checksum rules

Provides a clean DSL to validate params for controller actions.

Now you can validate VAT using the European service called VIES, to ensure it exists. Only require this gem and call validate_as_vat_number on your VAT field, in an Active Record object.

Validates wether an association belongs to the same owner

Validates CNPJ and test it with matchers in a simple way.

Brazilian zipcode validations for ActiveRecord, integrated with correios-cep gem.

The purpose of this gem is to validate countrycodes in ISO 3166-1 alpha-2 format

Validates CPF and test it with matchers in a simple way.

Validates CURP and test it with matchers in a simple way.

ActiveRecord callback which handle the name duplication in your model.

Some description for validates-gem

Rails 2 and Rails 3 plugin. Validates e-mail address format (RFC2822 and RFC3696) and whitelist/blacklist the domain part.

Validates Host, Domain and IP and test it with matchers in a simple way.

Validate iban

Adds ActiveModel validators for common instant messaging services like Skype and AIM.