[Nitro] is Orderable weird exception

[Aureliano Calvo]

> like before and like I explained already, Orderable as class can
> not be found so Og does some magic.
> Require the right file (og/model/orderable.rb) and it'll go away.

I've required the right file and this error went away but orderable is
not working :(.
It creates the position row in the database but it does not fill it.

Models:
class Question
  attr_accessor :text, String
  belongs_to :survey
  is Orderable, :scope => :survey
end

class Survey
  attr_accessor :name, String
  has_many :questions , :list => true, :order => 'position DESC'
end

Offending spec:

describe Question, "new" do

  before( :all ) do
    @your_car = Survey.create_with( :name => "your car")
  end

  it "positions should be set" do
    @like_your_car = Question.create_with( :text => "Do you like your car?")
    @your_car.questions << like_your_car
    @your_car_color = Question.create_with( :text => "What is the
color of your car?")
    @your_car.questions << your_car_color

    @like_your_car.position.should == 1 # position == null both here
and in the database.
    @your_car_color.position.should == 2
  end

  after( :each ) do
    Question.delete_all
  end

  after( :all ) do
    Survey.delete_all
  end
end