osem-fcy/db/migrate/20140112192801_create_qanswers_registrations.rb

class CreateQanswersRegistrations < ActiveRecord::Migration
  def change
    create_table :qanswers_registrations, :id => false do |t|
      t.references :registration, :null => false
      t.references :qanswer, :null => false
    end
  end
end