elsif @field_name.match(/_id/)
          if @table_name == 'file_metas' and @field_name == 'parent_id'
            value = value.to_i + KEY_OFFSETS[@table_name].to_i unless value.nil?
          else
            # parse out the table
            table_name = @field_name.gsub(/_id/,'s')
            value = value.to_i + KEY_OFFSETS[table_name].to_i
          end
        end