sequel versioning

gistfile1.rbx

class Ticket < Sequel::Model
  set_schema do
    foreign_key :ticket_version_id, :table => :ticket_version
  end
  is(:versioned_fact, {:dimensions => [TicketVersion]})  
  one_to_many :ticket_versions
end

class TicketVersion < Sequel::Model
 set_schema do
   foreign_key :ticket_id, :table => :tickets
 end
 is :versioned_object
 many_to_one :ticket
end

tic = Ticket.create(:name=>"version 1")
tic.name = "version 2"
tic.save
puts tic.current_ticket_version  # should =2 
puts tic.get_version(1).name #should = name.  This methoud is not implemented.  How woudl I get this fucntionality?