Rn

This gem adds a validator for the Belgium government registration numbers (also known as rijksregisternummer or RN for short). You can use it to check if the registration number is a valid number, you can also optionally check against a users birthday.

Add this line to your application's Gemfile:

gem 'rn'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rn

Using the RnValidator:

class User < ActiveRecord::Base
	validates :number, rn: true
end

This will only check if the number conforms to the rules specified by the Belgian government.

You can also validate against the users birthday:

class User < ActiveRecord::Base
	validates :number, rn: { birthday: true }
end

This will look for the users birthday in the birthday property which has to be a Date. If you want to use another method or column, you can do that as follows:

class User < ActiveRecord::Base
	validates :number, rn: { birthday: true, birthday_column: :date_of_birth }
end

Add the following to your locale file:

en:
	activemodel:
		errors:
			models:
				MODEL:
					attributes:
						ATTRIBUTE:
							invalid_registration_number: 'is not a valid registration number'
							no_matching_birthday: 'does not match birthday'

1. Fork it
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 new Pull Request