flutter - 如何使用嵌套类互相与蜂巢？

Question

您好，我有三个嵌套类，我希望将它们存储在 hive 包提供的盒子中，我插入了一些代码，但我不知道这是真实的方式，我该如何存储它们，有人可以帮助我吗？

@HiveType(typeId : 1)
class CategoryModel extends HiveObject{
  CategoryModel(
      { this.categoryId,
        this.categoryImagePath,
        this.categoryName,
        this.categoryColor,
        this.subCategoryModels});

  @HiveField(0)
  final int categoryColor;

  @HiveField(1)
  HiveList <SubCategoryModel> subCategoryModels;

  @HiveField(2)
  int categoryId;

  @HiveField(3)
  String categoryImagePath;

  @HiveField(4)
  String categoryName;


}

@HiveType(typeId : 2)
class SubCategoryModel extends HiveObject{
  SubCategoryModel({
    this.subCategoryId,
    this.subCategoryImagePath,
    this.subCategoryName,
    this.categoryColor,
    this.recipeId,
    HiveList<Ingredient>ingredients,
    this.recipePhotoDir,
    this.recordedVoiceDir,
    bool isCompeted});

  @HiveField(0)
  final Color categoryColor;

  @HiveField(1)
  final double recipeId;

  @HiveField(2)
  bool isCompleted;

  @HiveField(3)
  int subCategoryId;

  @HiveField(4)
  String subCategoryImagePath;

  @HiveField(5)
  String subCategoryName;

  @HiveField(6)
  HiveList <Ingredient> ingredients ;

  @HiveField(7)
  String recipePhotoDir;

  @HiveField(8)
  String recordedVoiceDir;

}

@HiveType(typeId: 3)
class Ingredient extends HiveObject{
  Ingredient({this.ingredientName,
              this.dropDownValue,
              this.ingredientAmount});

  @HiveField(0)
  final ingredientName;

  @HiveField(1)
  String dropDownValue;

  @HiveField(2)
  String ingredientAmount;
}

class HiveHelper{
  Box <CategoryModel>categoryModels;
  CategoryModel categoryModel;

  void initState() async {
    if(categoryModels==null){
      var _directory =await getApplicationDocumentsDirectory();
      Hive
        ..init(_directory.path)
        ..registerAdapter(CategoryModelAdapter())
        ..registerAdapter(SubCategoryModelAdapter())
        ..registerAdapter(IngredientAdapter());

      categoryModels = await Hive.openBox<CategoryModel>('categoryModels');

    }
  }
  void addCategoryModel(CategoryModel categoryModel)async{
    await categoryModels.add(categoryModel);
  }
  Future <Box> getCategoryModels()async{
    return categoryModels;
  }
}

标签： flutterflutter-hive