Nip

This gem provides the Nip class to check the NIP number.

NIP (Numer Identyfikacji Podatkowej) is the Polish Tax Identification Number.

More information (in Polish language): http://pl.wikipedia.org/wiki/NIP

If you are looking for the Nip as a plugin: http://github.com/macuk/nip-plugin

Installation

gem install nip

Example

Standalone class:

nip = Nip.new('845-167-08-82') nip.valid? # true nip.to_s # '8451670882'

ActiveRecord:

class Company < ActiveRecord::Base validate :check_nip

private
  def check_nip
    n = Nip.new(nip)
    errors[:nip] << 'Invalid NIP number' unless n.valid?
  end

end

Copyright (c) 2010 Piotr Macuk, released under the MIT license