when the Constructor has no params , dart run build_runner build cannot build the correct query result

[1196185392]

1、this is Entity SpaceInfo：

2、this is SpaceInfoDao defined：

3、but after run build_runner build ， I need
@OverRide
Future<List> findAllSpaceInfo() async {
return _queryAdapter.queryList('SELECT * FROM SpaceInfo',
mapper: (Map<String, Object?> row) => SpaceInfo().fromJson(row));
}

why can not build with SpaceInfo.fromJson(row) ?