角度解析:未定义变量

我是第一次使用角度路线，我最近提出了一个关于刷新丢失一些数据的问题，我得到的答案是使用解析。这似乎是我一直在寻找的解决方案，但我无法让它正常工作。

.config(['$routeProvider', function($routeProvider) {
           //determines redirects go via shortcuts, clicking on the management icon on the main page sends the routeProvider /MG which it then uses to pull the relevant HTML file
           $routeProvider
               .when('/MG', {
                   controller: 'teammateController',
                   templateUrl: './assets/departments/department.html',
                   resolve: {
                       activeDepartment: function() {
                           return 'Management'
                       }
                   }
               })
               .when('/PO', {
                   controller: 'teammateController',
                   templateUrl: './assets/departments/department.html',
                   resolve: {
                       activeDepartment: function() {
                           return 'Programs Office'
                       }
                   }
               })
               .when('/SM', {
                   controller: 'teammateController',
                   templateUrl: './assets/departments/department.html',
                   resolve: {
                       activeDepartment: function() {
                           return 'Sales And Marketing'
                       }
                   }
               })
               .when('/', {
                   controller: 'teammateController',
                   templateUrl: 'home.html',
                   resolve: {
                       activeDepartment: function() {
                           console.log("working");
                           return 'home';
                       }
                   }
               })
               .otherwise({
                   controller: 'teammateController',
                   templateUrl: 'home.html',
                   resolve: {
                       activeDepartment: function() {
                           console.log("working");
                           return 'home';
                       }
                   }
               })
       }]);
   app.controller('teammateController', function teammateController($scope, $http, $rootScope, $timeout, Idle, $location) {
       $scope.deptName = activeDepartment();
     });

我收到"引用错误：未定义活动部门"。控制台日志工作，我看到"工作"，所以我知道正在运行解决方案，但随后出现错误消息。我已经尝试了我能想到的一切，我一辈子都看不到我哪里出了问题。任何帮助将不胜感激。