flutter - hive 错误 : There is already a TypeAdapter

Question

我目前正在实现 Hive在我的 FlutterApp 中。不幸的是，这个错误一直弹出:

HiveError: There is already a TypeAdapter for typeId 100.

这是我的对象:

@HiveType(typeId: 100)
class ShopList{
  @HiveField(0)
  String name;
  @HiveField(1)
  List<ListProduct> products = List();

  ShopList({this.name, this.products});

那是自动生成的适配器:

class ShopListAdapter extends TypeAdapter<ShopList> {
  @override
  final int typeId = 100;

  @override
  ShopList read(BinaryReader reader) {
    final numOfFields = reader.readByte();
    final fields = <int, dynamic>{
      for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
    };
    return ShopList(
      name: fields[0] as String,
      products: (fields[1] as List)?.cast<ListProduct>(),
    );
  }

  @override
  void write(BinaryWriter writer, ShopList obj) {
    writer
      ..writeByte(2)
      ..writeByte(0)
      ..write(obj.name)
      ..writeByte(1)
      ..write(obj.products);
  }

  @override
  int get hashCode => typeId.hashCode;

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

我还有其他一些带有 typeId 的对象s 101 和 102，它们抛出相同的错误。 Hive.registerAdapter(ShopListAdapter));在 try-catch-block 中运行.所以如果适配器已经加载，代码可以继续，但是 FutureBuilder -Widget 使用来自 Hive 的值加载无限长。
你有什么建议吗？

Answer 1

您需要检查 typeId，即使在同一文件中，它们也应该与其他类模型不同且唯一。

@HiveType(typeId: 0)
class Module1 {}

@HiveType(typeId: 1)
class Module2 {}

一旦 typeId 被改变，那么

reinstall the app,
delete .g.dart generated file,
run command ---> flutter packages pub run build_runner build