GetIt注入报错：NotificationRepositoryImpl依赖未注册的NotificationService

我了解已有类似问题，但未找到解决方案。NotificationRepository依赖NotificationService，而后者依赖Flutter Local Notifications插件实例。

初始化代码 #

// Initialization 
final GetIt getIt = GetIt.instance;

@InjectableInit(
  initializerName: 'init', // default
  preferRelativeImports: true, // default
  asExtension: true,
)
void configureDependencies() => getIt.init(); 

已在main函数中调用该方法。

模块代码 #

@module
abstract class InjectableModule {
  // for other use
  @lazySingleton
  Dio dio() => ...

  @lazySingleton
  FlutterLocalNotificationsPlugin getLocalNotification() =>
      FlutterLocalNotificationsPlugin();
}

这是用于将FlutterLocalNotificationsPlugin注入NotificationService的模块。

NotificationService实现 #

abstract class NotificationService {
 // required functions...
}


@LazySingleton(as: NotificationService)
class NotificationServiceImp implements NotificationService {
  final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin;

  NotificationServiceImp(this.flutterLocalNotificationsPlugin);
  .....
}

NotificationRepository实现 #

abstract class NotificationRepository {
  ....
}

@LazySingleton(as: NotificationRepository)
class NotificationRepositoryImpl implements NotificationRepository {
  final NotificationService _notificationService;
  NotificationRepositoryImpl(this._notificationService);
  ....
}

运行build runner时的警告 #

[WARNING] injectable_generator:injectable_config_builder on lib/di/get_it.dart:
Missing dependencies in statedemo/di/get_it.dart

[NotificationRepositoryImpl] depends on unregistered type [NotificationService] from package:statedemo/data/services/notification_serivce_imp.dart

运行代码时的错误 #

Bad state: GetIt: Object/factory with type NotificationService is not registered inside GetIt.
(Did you accidentally do GetIt sl=GetIt.instance(); instead of GetIt sl=GetIt.instance;
Did you forget to register it?)

项目中其他依赖（如Dio）的GetIt注入正常，仅在实现通知功能时出现问题。手动实现NotificationService单例模式时功能正常，尝试命名实例后仍报错：

Bad state: GetIt: Object/factory with with name NotificationServiceImp and type NotificationService
is not registered inside GetIt.
(Did you accidentally do GetIt sl=GetIt.instance(); instead of GetIt sl=GetIt.instance;
Did you forget to register it?)

1. 确保注解被正确扫描 #

在configureDependencies所在文件顶部添加文件级别的@Injectable()注解，或者在@InjectableInit中明确指定扫描目录，避免injectable遗漏目标文件：

@Injectable()
final GetIt getIt = GetIt.instance;

@InjectableInit(
  initializerName: 'init',
  preferRelativeImports: true,
  asExtension: true,
  generateForDir: ['lib/data/services', 'lib/data/repositories'],
)
void configureDependencies() => getIt.init(); 

2. 修正拼写错误 #

警告中提到的文件路径是notification_serivce_imp.dart，其中serivce是拼写错误（正确应为service）。务必修正文件名、类名及所有相关导入路径的拼写，保证完全一致——拼写错误会导致注解扫描失效。

3. 清理并重新生成代码 #

删除旧的生成文件（通常是lib/di/get_it.config.dart），然后执行以下命令重新生成：

flutter pub run build_runner clean
flutter pub run build_runner build --delete-conflicting-outputs

4. 显式添加构造函数注解 #

如果上述步骤无效，尝试给NotificationServiceImp的构造函数添加@Injectable()注解（虽然@LazySingleton已包含该注解，但部分场景下显式添加可解决扫描问题）：

@LazySingleton(as: NotificationService)
class NotificationServiceImp implements NotificationService {
  final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin;

  @Injectable()
  NotificationServiceImp(this.flutterLocalNotificationsPlugin);
  // ...
}

内容的提问来源于stack exchange，提问作者Suraj Rao