HiveError: Cannot read, unknown typeId: 32. Did you forget to register an adapter?

Question

I'm trying to create a try Hive database and facing some issues I can't solve.

my model is

@HiveType(typeId: 1)
class Tasks {
  @HiveField(0)
  final String task;

  @HiveField(1)
  final bool isCompleted;

  Tasks({required this.task, required this.isCompleted});
}

and the file generated by hive_generator

class TasksAdapter extends TypeAdapter<Tasks> {
  @override
  final int typeId = 1;

  @override
  Tasks read(BinaryReader reader) {
    final numOfFields = reader.readByte();
    final fields = <int, dynamic>{
      for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
    };
    return Tasks(
      task: fields[0] as String,
      isCompleted: fields[1] as bool,
    );
  }

  @override
  void write(BinaryWriter writer, Tasks obj) {
    writer
      ..writeByte(2)
      ..writeByte(0)
      ..write(obj.task)
      ..writeByte(1)
      ..write(obj.isCompleted);
  }

    @override
  int get hashCode => typeId.hashCode;

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
      other is TasksAdapter &&
          runtimeType == other.runtimeType &&
          typeId == other.typeId;
}

in my main():

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  final directory = await getApplicationDocumentsDirectory();
  Hive.init(directory.path);

  Hive.registerAdapter(TasksAdapter());
  await Hive.openBox<Tasks>("TheList");

  runApp(const MyApp());
}

I also tried lazy open but the same error is showing in debugging.

my installed dependencies are: hive: ^2.0.4 hive_flutter: ^1.1.0 path_provider: ^2.0.5 and build_runner: ^2.1.2 hive_generator: ^1.1.1

Answer 1

The solution is replacing the Hive.init(); with Hive.initFlutter(); from hive_flutter package.

So, the code would be:

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  final document = await getApplicationDocumentsDirectory();
  await Hive.initFlutter(document.path);
  Hive.registerAdapter(TodoAdapter());
  await Hive.openBox<Todo>('todos');
  runApp(const MyApp());
}