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danagbemava opened this issue May 23, 2020 · 4 comments
Closed

GetIt fails to register instances #81

danagbemava opened this issue May 23, 2020 · 4 comments

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@danagbemava
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danagbemava commented May 23, 2020 •
edited
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I have setup my locators like so

GetIt locator = GetIt.I;

Future<void> setupLocators() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  final box = await Hive.openBox('user');

  locator.registerSingleton<UserService>(UserService(box),
      instanceName: 'User Service');
  locator.registerSingleton<SharedPreferences>(prefs,
      instanceName: 'Shared Preferences');
  locator.registerSingleton<SharedPrefsUtils>(SharedPrefsUtils(),
      instanceName: 'Shared Preferences Utils');

  locator.registerSingleton<AuthRepo>(AuthRepo(), instanceName: 'Auth Repo');
  locator.registerSingleton<AirtimeRepo>(AirtimeRepo(),
      instanceName: 'Airtime Repo');

  locator.registerSingleton<InternetBundleRepo>(InternetBundleRepo(),
      instanceName: 'Internet Bundle Repo');
  locator.registerSingleton<VoucherRepo>(VoucherRepo(),
      instanceName: 'Voucher Repo');
}

And this is my main method

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await Hive.initFlutter();
  await setupLocators();
  BlocSupervisor.delegate = BlocDelegate();

  runApp(IBorrowApp());
}

and this is the IBorrowApp widget

class IBorrowApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MultiBlocProvider(
      providers: [
        BlocProvider<AuthBloc>(
          create: (context) => AuthBloc(locator.get<AuthRepo>()),
        ),
        BlocProvider<AirtimeBloc>(
          create: (context) => AirtimeBloc(locator.get<AirtimeRepo>()),
        ),
        BlocProvider<InternetBundleBloc>(
          create: (context) =>
              InternetBundleBloc(locator.get<InternetBundleRepo>()),
        ),
        BlocProvider<VouchersBloc>(
          create: (context) => VouchersBloc(locator.get<VoucherRepo>()),
        ),
      ],
      child: MaterialApp(
        title: 'iBorrow',
        theme: Styles.lightTheme,
        onGenerateRoute: Router.onGenerateRoute(),
      ),
    );
  }
}

But when the app is run, I get an error

E/flutter (14500):  Did you forget to pass an instance name? 
E/flutter (14500): (Did you accidentally do  GetIt sl=GetIt.instance(); instead of GetIt sl=GetIt.instance;did you forget to register it?)
E/flutter (14500): #0      _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:42:39)
E/flutter (14500): #1      _AssertionError._throwNew (dart:core-patch/errors_patch.dart:38:5)
E/flutter (14500): #2      _GetItImplementation._findFactoryByNameOrType (package:get_it/get_it_impl.dart:251:14)
E/flutter (14500): #3      _GetItImplementation.get (package:get_it/get_it_impl.dart:263:27)
E/flutter (14500): #4      new SharedPrefsUtils (package:iborrow/utils/prefs_utils.dart:10:22)
E/flutter (14500): #5      setupLocators (package:iborrow/utils/locator.dart:18:47)
E/flutter (14500): <asynchronous suspension>
E/flutter (14500): #6      main (package:iborrow/main.dart:16:3)
E/flutter (14500): <asynchronous suspension>
E/flutter (14500): #7      _runMainZoned.<anonymous closure>.<anonymous closure> (dart:ui/hooks.dart:241:25)
E/flutter (14500): #8      _rootRun (dart:async/zone.dart:1184:13)
E/flutter (14500): #9      _CustomZone.run (dart:async/zone.dart:1077:19)
E/flutter (14500): #10     _runZoned (dart:async/zone.dart:1619:10)
E/flutter (14500): #11     runZonedGuarded (dart:async/zone.dart:1608:12)
E/flutter (14500): #12     _runMainZoned.<anonymous closure> (dart:ui/hooks.dart:233:5)
E/flutter (14500): #13     _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:301:19)
E/flutter (14500): #14     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)
E/flutter (14500):
I/flutter (14500): 'package:get_it/get_it_impl.dart': Failed assertion: line 251 pos 14: 'instanceFactory != null': No type UserService is registered inside GetIt.
I/flutter (14500):  Did you forget to pass an instance name? 
I/flutter (14500): (Did you accidentally do  GetIt sl=GetIt.instance(); instead of GetIt sl=GetIt.instance;did you forget to register it?)
I/flutter (14500): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
I/flutter (14500): The following assertion was thrown building ActivationScreen(dependencies: [_InheritedTheme,
I/flutter (14500): _LocalizationsScope-[GlobalKey#93dc5]], state: _ActivationScreenState#ef53e):
I/flutter (14500): No type AuthRepo is registered inside GetIt.
I/flutter (14500):  Did you forget to pass an instance name?
I/flutter (14500): (Did you accidentally do  GetIt sl=GetIt.instance(); instead of GetIt sl=GetIt.instance;did you
I/flutter (14500): forget to register it?)
I/flutter (14500): 'package:get_it/get_it_impl.dart':
I/flutter (14500): Failed assertion: line 251 pos 14: 'instanceFactory != null'
I/flutter (14500):
I/flutter (14500): The relevant error-causing widget was:
I/flutter (14500):   ActivationScreen file:///C:/Users/Deana/Flutter/side_hustle/iborrow/lib/utils/router.dart:20:20
I/flutter (14500):
I/flutter (14500): When the exception was thrown, this was the stack:
I/flutter (14500): #2      _GetItImplementation._findFactoryByNameOrType (package:get_it/get_it_impl.dart:251:14)
I/flutter (14500): #3      _GetItImplementation.get (package:get_it/get_it_impl.dart:263:27)
I/flutter (14500): #4      _IBorrowAppState.build.<anonymous closure> (package:iborrow/main.dart:34:49)
I/flutter (14500): #5      _CreateInheritedProviderState.value (package:provider/src/inherited_provider.dart:576:35)
I/flutter (14500): #6      _InheritedProviderScopeElement.value (package:provider/src/inherited_provider.dart:439:33)
I/flutter (14500): #7      Provider.of (package:provider/src/provider.dart:216:29)
I/flutter (14500): #8      BlocProvider.of (package:flutter_bloc/src/bloc_provider.dart:105:23)
I/flutter (14500): #9      _BlocListenerBaseState.initState (package:flutter_bloc/src/bloc_listener.dart:160:41)
I/flutter (14500): #10     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4640:58)
I/flutter (14500): #11     ComponentElement.mount (package:flutter/src/widgets/framework.dart:4476:5)
I/flutter (14500): #12     SingleChildWidgetElementMixin.mount (package:nested/nested.dart:223:11)
I/flutter (14500): ...     Normal element mounting (123 frames)
I/flutter (14500): #135    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3446:14)
I/flutter (14500): #136    Element.updateChild (package:flutter/src/widgets/framework.dart:3214:18)
I/flutter (14500): #137    RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:5580:32)
I/flutter (14500): #138    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:5957:17)
I/flutter (14500): #139    Element.updateChild (package:flutter/src/widgets/framework.dart:3201:15)
I/flutter (14500): #140    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4527:16)
I/flutter (14500): #141    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4675:11)
I/flutter (14500): #142    Element.rebuild (package:flutter/src/widgets/framework.dart:4218:5)
I/flutter (14500): #143    StatefulElement.update (package:flutter/src/widgets/framework.dart:4707:5)
I/flutter (14500): #144    Element.updateChild (package:flutter/src/widgets/framework.dart:3201:15)
I/flutter (14500): #145    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4527:16)
I/flutter (14500): #146    Element.rebuild (package:flutter/src/widgets/framework.dart:4218:5)
I/flutter (14500): #147    ProxyElement.update (package:flutter/src/widgets/framework.dart:4862:5)
I/flutter (14500): #148    _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:181:11)
I/flutter (14500): #149    Element.updateChild (package:flutter/src/widgets/framework.dart:3201:15)
I/flutter (14500): #150    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:5837:14)
I/flutter (14500): #151    Element.updateChild (package:flutter/src/widgets/framework.dart:3201:15)
I/flutter (14500): #152    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4527:16)
I/flutter (14500): #153    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4675:11)
I/flutter (14500): #154    Element.rebuild (package:flutter/src/widgets/framework.dart:4218:5)
I/flutter (14500): #155    StatefulElement.update (package:flutter/src/widgets/framework.dart:4707:5)
I/flutter (14500): #156    Element.updateChild (package:flutter/src/widgets/framework.dart:3201:15)
I/flutter (14500): #157    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:5837:14)
I/flutter (14500): #158    Element.updateChild (package:flutter/src/widgets/framework.dart:3201:15)
I/flutter (14500): #159    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:5837:14)
I/flutter (14500): #160    Element.updateChild (package:flutter/src/widgets/framework.dart:3201:15)
I/flutter (14500): #161    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4527:16)
I/flutter (14500): #162    Element.rebuild (package:flutter/src/widgets/framework.dart:4218:5)
I/flutter (14500): #163    StatelessElement.update (package:flutter/src/widgets/framework.dart:4583:5)
I/flutter (14500): #164    Element.updateChild (package:flutter/src/widgets/framework.dart:3201:15)
I/flutter (14500): #165    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4527:16)
I/flutter (14500): #166    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4675:11)
I/flutter (14500): #167    Element.rebuild (package:flutter/src/widgets/framework.dart:4218:5)
I/flutter (14500): #168    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2627:33)
I/flutter (14500): #169    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:883:20)
I/flutter (14500): #170    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:284:5)
I/flutter (14500): #171    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1113:15)
I/flutter (14500): #172    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1052:9)
I/flutter (14500): #173    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:968:5)
I/flutter (14500): #177    _invoke (dart:ui/hooks.dart:261:10)
I/flutter (14500): #178    _drawFrame (dart:ui/hooks.dart:219:3)
I/flutter (14500): (elided 5 frames from class _AssertionError and dart:async)
I/flutter (14500):
I/flutter (14500): ════════════════════════════════════════════════════════════════════════════════════════════════════

Flutter doctor summary:

[√] Flutter (Channel stable, v1.17.1, on Microsoft Windows [Version 10.0.18363.836], locale en-US)
 
[√] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
[√] Android Studio (version 3.6)
[√] VS Code, 64-bit edition (version 1.45.1)
[√] Connected device (1 available)

• No issues found!

UPDATE: Added the code for the IBorrowApp.
Side note: I do not use any relative imports in the app, all my imports are at the package level.
@escamoteur
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Why are you use instance names? If you use them when registering you have to pass the name when you access the instance with get.

@danagbemava
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danagbemava commented May 25, 2020 •
edited
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I added the instance names because I was getting the error posted in the initial comment.

Initially, they were working fine without the instance name, but it just stopped registering until I added the instance names.

After adding the instance names and calling get with them, the application is working fine.

I find the behavior strange because I have other projects in which I use get_it and don't use the instance names and they all work fine.

I even tried copying a working configuration from one of my projects and changing the instances to match the current project classes, but it still failed.

@escamoteur
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This sounds really weird. Did you always use the gerneric types when using without names?

@danagbemava
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Yes.
So I decided to do some debugging and I took out all the instance names across the entire project.
It is working for now, so this issue can be closed.
However, I will try to investigate and see what actually caused it to fail all of a sudden and share my findings.

@mahdiyami2 mahdiyami2 mentioned this issue Jun 28, 2020
Closed
@jikeyt jikeyt mentioned this issue Apr 9, 2021
Closed
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@escamoteur @danagbemava