Failed assertion: line 315 pos 7: 'instanceFactory != null': Object/factory with type LoginViewModel is not registered inside GetIt.

[lamgiahung112]

I got an error as stated in the title, but only in the instance(), everything else that uses getit's instance work just fine. I checked the log and see that everything is registered properly

My LoginScreen file:

`import 'package:flutter/material.dart';
import 'package:red_tutor_flutter_app/app/dependency_injection.dart';
import 'package:red_tutor_flutter_app/data/network/network_info.dart';
import 'login_viewmodel.dart';
import 'widgets/login_form.dart';
import '../resources/assets_manager.dart';

class LoginScreen extends StatefulWidget {
  const LoginScreen({super.key});

  @override
  State<LoginScreen> createState() => _LoginScreenState();
}

class _LoginScreenState extends State<LoginScreen> {
  final network = instance<NetworkInfo>();
  final _viewModel = instance<LoginViewModel>();

  _bind() {
    _viewModel.start();
  }

  @override
  void initState() {
    _bind();
    super.initState();
  }

  @override
  void dispose() {
    _viewModel.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      resizeToAvoidBottomInset: false,
      body: Stack(
        children: [
          Container(
            decoration: const BoxDecoration(
              image: DecorationImage(
                image: AssetImage(ImageAssets.loginBg),
                fit: BoxFit.cover,
              ),
            ),
          ),
          SafeArea(
            child: Container(
              margin: const EdgeInsets.symmetric(
                vertical: 12,
                horizontal: 12,
              ),
              child: const LoginForm(),
            ),
          ),
        ],
      ),
    );
  }
}
`

My dependency injection file:

`import 'dart:developer';

import 'package:data_connection_checker_nulls/data_connection_checker_nulls.dart';
import 'package:get_it/get_it.dart';
import 'package:red_tutor_flutter_app/app/app_prefs.dart';
import 'package:red_tutor_flutter_app/data/data_sources/remote_data_source.dart';
import 'package:red_tutor_flutter_app/data/network/app_api.dart';
import 'package:red_tutor_flutter_app/data/network/dio_factory.dart';
import 'package:red_tutor_flutter_app/data/network/network_info.dart';
import 'package:red_tutor_flutter_app/data/repository/repository_impl.dart';
import 'package:red_tutor_flutter_app/domain/repository/repository.dart';
import 'package:red_tutor_flutter_app/domain/usecase/login_usecase.dart';
import 'package:red_tutor_flutter_app/presentation/login/login_viewmodel.dart';
import 'package:shared_preferences/shared_preferences.dart';

final instance = GetIt.instance;

Future<void> initAppModule() async {
  final prefs = await SharedPreferences.getInstance();

  // shared preferences instance
  instance.registerLazySingleton<SharedPreferences>(() => prefs);

  // app preferences instance
  instance.registerLazySingleton<AppPreferences>(() => AppPreferences(instance()));

  // network info
  instance
      .registerLazySingleton<NetworkInfo>(() => NetworkInfoImpl(DataConnectionChecker()));

  // dio
  instance.registerLazySingleton<DioFactory>(() => DioFactory(instance()));

  // app service client
  final dio = await instance<DioFactory>().getDio();
  instance.registerLazySingleton<AppServiceClient>(() => AppServiceClient(dio));

  // remote data source
  instance
      .registerLazySingleton<RemoteDataSource>(() => RemoteDataSourceImpl(instance()));

  // repository
  instance
      .registerLazySingleton<Repository>(() => RepositoryImpl(instance(), instance()));
  log("Initialized app modules");
}

initLoginModule() {
  if (!instance.isRegistered<LoginViewModel>()) {
    log('here');
    instance.registerLazySingleton<LoginUseCase>(() => LoginUseCase(instance()));
    instance.registerLazySingleton<LoginViewModel>(() => LoginViewModel(instance()));
    log(instance.isRegistered<LoginViewModel>().toString());
    log("Initialized Login Module");
  }
}
`

[hussenIbrahim]

See this comment

[lamgiahung112]

PROBLEM SOLVED

I changed my dependency_injection.dart file name in to di.dart and it just works.
I still don't know why it works tho. It would be great if anyone could give some information about it!