EmailDomainInclusion

EmailDomainInclusion is a custom ActiveModel::EachValidator that checks if a given email has a whitelisted domain

Add this line to your application's Gemfile:

gem 'email_domain_inclusion'

And then execute:

$ bundle

Or install it yourself as:

$ gem install email_domain_inclusion

class Person
  include ActiveModel::Validations
  attr_accessor :name, :email

  validates :email, email_domain_inclusion: {allow_subdomains: true, allowed_domains: ["hotmail.com", "gmail.com"]}
end

You may also pass a Proc to allowed_domains

validates :email, email_domain_inclusion: {allowed_domains: ->(person) { AllowedDomains.pluck(:domain) }}

1. Fork it ( https://github.com/[my-github-username]/email_domain_inclusion/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request