The value of an AngularJS service is not being reflected in the view

I have implemented the stateProvider in my code, and I am facing an issue with updating the breadcrumbs in the header when the state changes. Instead of creating embedded views for each state, I have a service that shares an array of breadcrumbs containing their names and links. Whenever a state is called, a function inside each controller updates this array. I can see the values being updated in the service through the debugger, but the view does not refresh. Do you have any suggestions on how to resolve this issue?

Code: Header controller:

$scope.breadcrumbs = breadcrumbsService.breadcrumbs;

The View:

<md-button ng-repeat="breadcrumb in breadcrumbs" ui-sref="{{breadcrumb.link}}"> {{breadcrumb.title}} </md-button>

Service:

.service("breadcrumbsService", function Breadcrumbs() {
        var self = this;
        self.breadcrumbs = [
            {title: "Home", link: "KeyStyle.home"}
        ];
    });

Sample from another controller:

.controller("ownerRegistrationController", ["$scope", "Owner", "$http", "domain", "breadcrumbsService",
        function ($scope, Owner, $http, domain, breadcrumbsService) {

            updateBreadcrumbs();
...
        function updateBreadcrumbs() {
                breadcrumbsService.breadcrumbs = [
                    {title: "Home", link: "KeyStyle.home"},
                    {title: "New owner", link: "KeyStyle.home.owner.registration"}
                ];
            }

Answer №1

When you change the value of breadcrumbsService.breadcrumbs, you are disrupting the reference that was established with

$scope.breadcrumbs = breadcrumbsService.breadcrumbs;

Instead, it is advisable to add new entries to the array using the push method. Additionally, this action should either trigger a digest cycle ($scope.$apply()) or be scheduled for the next one ($scope.$applyAsync)

function updateBreadcrumbs() {
    $scope.$applyAsync(function() {
        breadcrumbsService.breadcrumbs.push({
            {title: "New owner", link: "KeyStyle.home.owner.registration"}
        });
    });
}

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