How to build query with successive order methods

Question

I am getting error for building query with chaining order methods as it has a return type of void.

  final qc =
        Entity_.objectID
            .equals(objectId)
            .and(Entity_.date
                .lessOrEqual(date.millisecondsSinceEpoch));

   final  QueryBuilder qBuilder = _box
        .query(qc)
        .order(DualPhaseOilWaterTankReadingData_.readingNumber)
        .order(DualPhaseOilWaterTankReadingData_.readingDate).build();

   
    List<Entity> data = qBuilder.find();
    qBuilder.close();
    return data

Answer 1

You can use special Dart syntax (cascade notation) to "chain the order method calls:

final QueryBuilder qBuilder = _box.query(qc)
  ..order(DualPhaseOilWaterTankReadingData_.readingNumber)
  ..order(DualPhaseOilWaterTankReadingData_.readingDate);
final query = qBuilder.build();