resolve_sti

# File activerecord/lib/active_record/insert_all.rb, line 101
      def resolve_sti
        return if model.descends_from_active_record?

        sti_type = model.sti_name
        @inserts = @inserts.map do |insert|
          insert.reverse_merge(model.inheritance_column.to_s => sti_type)
        end
      end