Bonanza
Bonanza provides some nice helpers and enhancements for nine.ch Rails apps.
For real cowboys only!

Installation
Add this line to your application's Gemfile:
gem 'bonanza'
And then execute:
$ bundle
Link Helpers
There is a basic little helper to get an application's url. To use the urn specific link helpers, the infrastructure-client dependency is required.
nine_app_url(:redmine, :issue, '123')
=> "https://redmine.nine.ch/issues/123"
There are two link helpers for the nine ticket systems. One for customer profiles and one for tickets.
Link to a customer profile:
<%= link_to_otrs_customer 'OTRS Customer Profile', 5247, class: 'blue' %>
Link to an otrs ticket:
<%= link_to_otrs_ticket 'OTRS Ticket', '2014110610000325' %>
Link to customer data in Billing:
<%= link_to_billing 'Billing', 5247, class: 'blue' %>
Link to customer data in the Mighty Stats:
<%= link_to_stats 'Stats', 5247, class: 'black' %>
Link to a redmine issue:
<%= link_to_redmine 'Redmine', 123 %>
Link to a migration item:
<%= link_to_migration_item 'Migration', 123 %>
Link to a resource represented by a URN:
<%= link_to_urn 'VServer', 'urn:nine:vserver:1279' %>
Validators
Bonanza can validate OTRS Ticket numbers. But don't fear! It just checks for a 16-character number.
class Order < ActiveRecord::Base
include Bonanza::Validators
validates :otrs_ticket, otrs_number: true
end
Bonanza can validate nine urns, like 'urn:nine:vserver:1234'. To use this validator, the infrastructure-client dependency is required.
class Order < ActiveRecord::Base
include Bonanza::Validators
validates :urn, urn: true
end