Reserved Subdomains

Add this line to your application's Gemfile:

gem 'reserved_subdomains'

And then execute:

$ bundle

Or install it yourself as:

$ gem install reserved_subdomains

Use the custom validator on your ActiveModel or ActiveRecord class for normal validation.

class Company < ApplicationRecord
  validates :subdomain, allowed_subdomain: true
end

• https://github.com/Sage/vat_id_validator - for code organization and testing inspiration
• https://github.com/nkkollaw/reserved-subdomains - For the list of subdomains

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/clayton/reserved_subdomains.

The gem is available as open source under the terms of the MIT License.