Ruby on Rails

Hi,

I'm using habtm to create a relationship between two models:

class Question < ActiveRecord::Base

  has_and_belongs_to_many :exams

end

class Exam < ActiveRecord::Base

  has_and_belongs_to_many :questions

end

At some point I'm doing this:

class Exam < ActiveRecord::Base

   has_and_belongs_to_many :questions

   def generate

      (1..5).each do

         questions.create(Question::SKELETON)

      end

   end

end

When I do that, a sql inserts a record inside questions_exams table.

But this table has another column called: 'order' where I need to put some data inside

How can I populate the 'order' column inside join table ?

questions_exams

   - question_id

   - exam_id

   - order

Thanks.