I have a Navigation bar, and the list of tab widgets are all initialised in a controller called RootController.

I happen to add another tab to the list called JobsView() but when i try to move to navigate to the tab it gives me this error:

I have tried initialising the controller it said was missing but i don't really understand where it is missing because looks like all my controllers are initialized. What's the trick?

I will add the following snippets:

JobsView() root_controller

class JobsView extends GetView<EServicesController> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      floatingActionButton: new FloatingActionButton(
        child: new Icon(Icons.add, size: 32, color: Get.theme.primaryColor),
        onPressed: () => {Get.offAndToNamed(Routes.E_SERVICE_FORM)},
        backgroundColor: Get.theme.colorScheme.secondary,
      ),
      floatingActionButtonLocation: FloatingActionButtonLocation.endFloat,
      body: RefreshIndicator(
        onRefresh: () async {
          Get.find<LaravelApiClient>().forceRefresh();
          controller.refreshEServices(showMessage: true);
          Get.find<LaravelApiClient>().unForceRefresh();
        },
        child: CustomScrollView(
          controller: controller.scrollController,
          physics: AlwaysScrollableScrollPhysics(),
          shrinkWrap: false,
          slivers: <Widget>[
            SliverAppBar(
              backgroundColor: Get.theme.scaffoldBackgroundColor,
              expandedHeight: 140,
              elevation: 0.5,
              primary: true,
              pinned: false,
              floating: true,
              iconTheme: IconThemeData(color: Get.theme.primaryColor),
              title: Text(
                "My Services".tr,
                style: Get.textTheme.headline6.merge(TextStyle(color: Get.theme.primaryColor)),
              ),
              centerTitle: true,
              automaticallyImplyLeading: false,
              leading: new IconButton(
                icon: new Icon(Icons.arrow_back_ios, color: Get.theme.primaryColor),
                onPressed: () => {Get.back()},
              ),
              bottom: HomeSearchBarWidget(),
              flexibleSpace: FlexibleSpaceBar(
                  collapseMode: CollapseMode.parallax,
                  background: Container(
                    width: double.infinity,
                    padding: EdgeInsets.symmetric(vertical: 75),
                    decoration: new BoxDecoration(
                      gradient: new LinearGradient(
                          colors: [Get.theme.colorScheme.secondary.withOpacity(1), Get.theme.colorScheme.secondary.withOpacity(0.2)],
                          begin: AlignmentDirectional.topStart,
                          //const FractionalOffset(1, 0),
                          end: AlignmentDirectional.bottomEnd,
                          stops: [0.1, 0.9],
                          tileMode: TileMode.clamp),
                      borderRadius: BorderRadius.only(topLeft: Radius.circular(5), topRight: Radius.circular(5)),
                    ),
                  )).marginOnly(bottom: 42),
            ),
            SliverToBoxAdapter(
              child: Wrap(
                children: [
                  Container(
                    height: 60,
                    child: ListView(
                        primary: false,
                        shrinkWrap: true,
                        scrollDirection: Axis.horizontal,
                        children: List.generate(CategoryFilter.values.length, (index) {
                          var _filter = CategoryFilter.values.elementAt(index);
                          return Obx(() {
                            return Padding(
                              padding: const EdgeInsetsDirectional.only(start: 20),
                              child: RawChip(
                                elevation: 0,
                                label: Text(_filter.toString().tr),
                                labelStyle: controller.isSelected(_filter)
                                    ? Get.textTheme.bodyText2.merge(TextStyle(color: Get.theme.primaryColor))
                                    : Get.textTheme.bodyText2,
                                padding: EdgeInsets.symmetric(horizontal: 12, vertical: 15),
                                backgroundColor: Get.theme.focusColor.withOpacity(0.1),
                                selectedColor: Get.theme.colorScheme.secondary,
                                selected: controller.isSelected(_filter),
                                shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
                                showCheckmark: true,
                                checkmarkColor: Get.theme.primaryColor,
                                onSelected: (bool value) {
                                  controller.toggleSelected(_filter);
                                  controller.loadEServicesOfCategory(filter: controller.selected.value);
                                },
                              ),
                            );
                          });
                        })),
                  ),
                  ServicesListWidget(),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class RootController extends GetxController {
  
  final currentIndex = 0.obs;
  final notificationsCount = 0.obs;
  final customPages = <CustomPage>[].obs;
  NotificationRepository _notificationRepository;
  CustomPageRepository _customPageRepository;
  RootController() {
    _notificationRepository = new NotificationRepository();
    _customPageRepository = new CustomPageRepository();
  }

  @override
  void onInit() async {
    await getCustomPages();
    if (Get.arguments != null && Get.arguments is int) {
      changePageInRoot(Get.arguments as int);
    } else {
      changePageInRoot(0);
    }
    super.onInit();
  }
  
  List<Widget> pages = [
    HomeView(),
    JobsView(),
    ReviewsView(),
    MessagesView(),
    AccountView(),
  ];

  Widget get currentPage => pages[currentIndex.value];

  /**
   * change page in route
   * */
  void changePageInRoot(int _index) {
    currentIndex.value = _index;
  }

  void changePageOutRoot(int _index) {
    currentIndex.value = _index;
    Get.offNamedUntil(Routes.ROOT, (Route route) {
      if (route.settings.name == Routes.ROOT) {
        return true;
      }
      return false;
    }, arguments: _index);
  }

  Future<void> changePage(int _index) async {
    if (Get.currentRoute == Routes.ROOT) {
      changePageInRoot(_index);
    } else {
      changePageOutRoot(_index);
    }
    await refreshPage(_index);
  }

  Future<void> refreshPage(int _index) async {
    switch (_index) {
      case 0:
        {
          await Get.find<HomeController>().refreshHome();
          break;
        }
      case 2:
        {
          await Get.find<MessagesController>().refreshMessages();
          break;
        }
    }
  }

  void getNotificationsCount() async {
    notificationsCount.value = await _notificationRepository.getCount();
  }

  Future<void> getCustomPages() async {
    customPages.assignAll(await _customPageRepository.all());
  }
}

CodePudding user response：

you need to initialise controller before used it as mention in error logs. so you can try this:

So before use any controller in GETX you need to initialise first before use it.

 @override
  Widget build(BuildContext context) {
    Get.put(EServicesController()); // ADD this line
     return Scaffold(...);
  } 

You learn more about GETX controller check out this link

Checkout package Readme for more details.