construct_owner_attributes

# File activerecord/lib/active_record/associations/has_many_through_association.rb, line 92
        def construct_owner_attributes(reflection)
          if as = reflection.options[:as]
            { "#{as}_id" => @owner.id,
              "#{as}_type" => @owner.class.base_class.name.to_s }
          else
            { reflection.primary_key_name => @owner.id }
          end
        end