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Description: Small library for validating Australian Business Numbers
Homepage:
Clone URL: git://github.com/yob/abn.git 
mention the new AR validation method in the README
yob (author)
Wed Apr 15 22:17:27 -0700 2009
commit  6c2ab0bc6f6daa9026c57d20b7b0890e0ead1b7b
tree    f183904b4a9c9d864493e340271ecb6387b92612
parent  13534a83ff0f5df28ffd8a4e0a3f36af5ba33cb6
abn /
name age
history
message
file CHANGELOG Wed Apr 15 22:06:07 -0700 2009 CHANGELOG update [yob]
file MIT-LICENSE Mon Jul 28 01:24:51 -0700 2008 initial commit [yob]
file README.rdoc Wed Apr 15 22:23:42 -0700 2009 mention the new AR validation method in the README [yob]
file Rakefile Tue Aug 12 18:44:46 -0700 2008 update a few files to reference the fact this g... [yob]
file TODO Mon Aug 11 23:26:05 -0700 2008 added TODO for support for business.gov.au API [bjeanes]
file abn.gemspec Wed Apr 15 21:33:20 -0700 2009 version bump [codeape]
directory lib/ Wed Apr 15 22:04:55 -0700 2009 whitespace [yob]
directory spec/ Wed Apr 15 22:04:55 -0700 2009 whitespace [yob]
README.rdoc

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

The gem includes a simple ActiveRecord method to validate your model attributes and ensure they’re a valid ABN.

Start by loading the gem in your app. In Rails 2.1 or higher, the best place to do this is in config/environment.rb 

    config.gem "abn", :version => "1.3.0"

Then just add the follow line to your model: 

    validates_abn_correctness_of :abn

If you want to allow empty values, then the standard option for that works: 

    validates_abn_correctness_of :abn, :allow_nil => true

Further Reading