A small library for validating Australian Business Numbers (ABN)
Installation
gem install abn
Usage
require 'abn'
ABN.new("12042168743").valid?
=> true
ABN.valid?("12042168743")
=> true
ABN.valid?("12042168744")
=> false
With ActiveRecord
Version 1.3 of this gem had an active record mixin for validating ABN fields in models. I removed it in version 2.0 to avoid complications of supporting active record 2.x and 3.x (and Datamapper, Mongoid, etc).
To validate an ABN field in your model add the ABN gem to your Gemfile and use the following pattern:
class Business < ActiveRecord::Base
validate :validate_abn
private
def validate_abn
if self.abn.present && !ABN.valid?(self.abn)
self.errors.add(:abn, "is not a valid ABN")
false
end
end
end