Can't access an instance member in an initializer for redirection example

[nyck33]

I tried to copy that one like this:

class SmartPMSApp extends ConsumerWidget {
  SmartPMSApp(
      {Key? key,
      required this.user,
      required this.appBarState,
      required this.sideBarState,
      required this.loginStatus,
      required this.sessionValid})
      : super(key: key);
  final UserSharedPrefs user;
  final AppBarState appBarState;
  final SideBarState sideBarState;
  final LoginStatus loginStatus;
  //session was loaded from SP
  final bool sessionValid;
  //changenotifier from go_router example
  final loginInfo = LoginInfo();

  //LoginInfo get _loginInfo => loginInfo;

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final userProviderState = ref.watch(userProvider);
    final sidebarProviderState = ref.watch(sideBarProvider);
    final appBarProviderState = ref.watch(appBarProvider);
    final userNotifierProvider = ref.watch(userProvider.notifier);
    final sidebarNotifierProvider = ref.watch(sideBarProvider.notifier);
    final appbarNotifierProvider = ref.watch(appBarProvider.notifier);
    //final sessionNotifierProvider = ref.watch(sessionProvider.notifier);
    //initialize Storage in each controller
    userNotifierProvider.initializeStorage();
    sidebarNotifierProvider.initializeStorage();
    appbarNotifierProvider.initializeStorage();
    //set state loaded from Storage
    userNotifierProvider.initializeUser(user);
    sidebarNotifierProvider.initializeSideBarState(sideBarState);
    appbarNotifierProvider.initializeAppBarState(appBarState);
    if (sessionValid) {
      //for go_router
      //sessionNotifierProvider.setSessionInvalid();
      loginInfo.login();
    }

    return MaterialApp.router(
        routeInformationParser: _router.routeInformationParser,
        routerDelegate: _router.routerDelegate,
        title: 'SmartPMS X');
  }

  //userSharedPrefs dummyUser has loginStatus loggedIn
  final _router = GoRouter(
    initialLocation: pathZeroMap[PathsZero.home]!,
    routes: [
      GoRoute(
          path: pathZeroMap[PathsZero.home]!,
          pageBuilder: (context, state) {
            return MaterialPage<void>(
                key: state.pageKey, child: MyHomePage(title: 'SmartPMS X'));
          }),
      GoRoute(
        path: '/login',
        pageBuilder: (context, state) => MaterialPage<void>(
          key: state.pageKey,
          child: LoginScreen(),
        ),
      ),
      //TODO sub_routes and other routes here
    ],
    errorPageBuilder: (context, state) => MaterialPage<void>(
      key: state.pageKey,
      child: ErrorPage(state.error),
    ),
    redirect: (state) {},
    refreshListenable: loginInfo,
    //urlPathStrategy: UrlPathStrategy.path,
    debugLogDiagnostics: true,
  );
}

But it's telling me I cannot access loginInfo. Why is that?

[nyck33]

The example redirection.dart looks like

/// sample app using redirection to another location
class App extends StatelessWidget {
  App({Key? key}) : super(key: key);

  final loginInfo = LoginInfo();

  // add the login info into the tree as app state that can change over time
  @override
  Widget build(BuildContext context) => ChangeNotifierProvider<LoginInfo>.value(
        value: loginInfo,
        child: MaterialApp.router(
          routeInformationParser: _router.routeInformationParser,
          routerDelegate: _router.routerDelegate,
          title: 'GoRouter Example: Redirection',
          debugShowCheckedModeBanner: false,
        ),
      );
.
.
.

loginInfo looks like an instance member there too but it can be accessed. What's the difference between the example and mine?

[csells]

What's the error?

[nyck33]

@csells

The instance member 'loginInfo' can't be accessed in an initializer.
Try replacing the reference to the instance member with a different expressiond

[csells]

Try replacing this:

final _router = GoRouter(...)

With this:

late final _router = GoRouter(...)

[nyck33]

Thank you Mr. Sells, I apologize for not being more experimental. I was being lazy, get it?