Flutter hive：无法生成适配器文件

Posted 2023-04-14

【中文标题】Flutter hive：无法生成适配器文件

【英文标题】：Flutter hive: cannot generate Adapter files

【发布时间】：2021-11-06 23:10:19

【问题描述】：

我有一个这样的模型：

import 'package:uuid/uuid.dart';
import 'package:hive/hive.dart';

part 'config_item.g.dart';

@HiveType()
class ConfigItem 
  @HiveField(0)
  String _id; // this can be a uuid or a MongoDB ObjectID
  @HiveField(1)
  final String deviceName;
....

我喜欢生成适配器文件，但它不想这样做！当我调用flutter packages pub run build_runner build --delete-conflicting-outputs 时，我得到以下输出：

flutter packages pub run build_runner build  --delete-conflicting-outputs                main  ✭ ✈
[INFO] Generating build script...
[INFO] Generating build script completed, took 399ms

[SEVERE] Nothing can be built, yet a build was requested.
[INFO] Initializing inputs
[INFO] Reading cached asset graph...
[INFO] Reading cached asset graph completed, took 45ms

[INFO] Checking for updates since last build...
[INFO] Checking for updates since last build completed, took 399ms

[INFO] Running build...
[INFO] Running build completed, took 3ms

[INFO] Caching finalized dependency graph...
[INFO] Caching finalized dependency graph completed, took 35ms

[INFO] Succeeded after 53ms with 0 outputs (0 actions)

在我的pubspec.yaml 我有：

environment:
  sdk: ">=2.12.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter


  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for ios style icons.
  cupertino_icons: ^1.0.2
  bottom_navy_bar: ^6.0.0
  get_it: ^7.2.0
  get_it_mixin: ^3.1.3
  servicestack: ^2.0.0
  font_awesome_flutter: ^9.1.0
  hive: ^2.0.4
  hive_flutter: ^1.1.0
  path_provider: ^2.0.3
  uuid: ^3.0.4

dev_dependencies:
  flutter_test:
    sdk: flutter
  build_runner:

我尝试了各种方法，例如

删除 .dart_tool 文件夹 将*.g.dart 添加到.gitignore flutter clean 还有很多我在网上搜索时发现的。

但没有任何帮助！知道缺少什么吗？

我正在使用最新（稳定）版本的 Flutter、dart SDK 和 androidStudio。

【问题讨论】：

我认为您在开发依赖项中缺少hive_generator: ^1.1.1。

这就是build 的解决方案。我必须在 @HiveType 注释中分配一个 typeId，如下所示：@HiveType(typeId : 1)。非常感谢您的提示。

【参考方案1】：

运行这个命令：

flutter packages pub run build_runner build

但在此之前，您必须导入生成器。

示例：如果您的文件名为 project_database.dart，则在该文件中：

导入，

import 'package:hive/hive.dart';
part 'project_database.g.dart'; //this will show an error initially but if
 // you run the above command, it will generate the generator file

【参考方案2】：

我有同样的问题。我通过将更改保存在 pubspec.yaml 中来解决。 只需在 pubspec.yaml 中按 ctrl + s 然后运行 ​​flutter packages pub run build_runner build 再次。

【参考方案3】：

我遇到了同样的问题，但我错过了hive_generator: ^1.1.1。原来Docs里没找到。

特别感谢@Denny Mueller 的评论