create_through_record

# File activerecord/lib/active_record/associations/has_one_through_association.rb, line 5
      def create_through_record(new_value) #nodoc:
        klass = @reflection.through_reflection.klass

        current_object = @owner.send(@reflection.through_reflection.name)
        
        if current_object
          klass.destroy(current_object)
          @owner.clear_association_cache
        end
        
        @owner.send(@reflection.through_reflection.name,  klass.send(:create, construct_join_attributes(new_value)))
      end