Domain Validator 
This is a ActiveModel validator for domains.
Installation
gem install domain-validator
Usage
In your models, the gem provides new :domain validator
class Model < ActiveRecord::Base
validates :domain_name, domain: true
end
Domain Validator
validates :domain_name, domain: true
validates :domain_name, domain: { message: 'custom message' }
Localization Tricks
To customize error message, you can use { message: "your custom message" } or simple use Rails localization en.yml file, for instance:
en:
errors:
messages:
domain:
long: "your custom length error message"
activemodel:
errors:
messages:
domain:
invalid: "custom error message only for activemodel"
models:
your_model:
domain:
invalid: "custom error message for YourDomain model"
Copyright
Copyright 2015 Shuttlerock Ltd. See LICENSE for details.