如何 return Firebase 在 Angular 中被拒绝的承诺

Question

我正在尝试 return 来自 Angular 中 Firebase promise 的 Rejected 函数的一些数据用于 $routeChangeError。出于某种原因，console.error(data) 有效，但下一行 return 数据无效。

这是我的代码：

angular.module('campaignsHub.dashboard', ['ngRoute'])
  .run(["$rootScope", "$location", "$route",
    function($rootScope, $location, $route) {

      $rootScope.$on("$routeChangeError", function(event, next, previous, error) {

        // This works if I use return authService.auth.$requireAuth(); and nothing else
        if (error === "AUTH_REQUIRED") {
          $location.path("/login");
        }

      });

    }
  ])

.config(['$routeProvider',
  function($routeProvider) {
    $routeProvider.when('/dashboard', {
      templateUrl: 'dashboard/dashboard.html',
      controller: 'DashboardCtrl',
      resolve: {

        "currentAuth": ["authService",
          function(authService) {
            authService.auth.$requireAuth().then(function(data) {
              // RESOLVED
              authService.GetCurrentUser().then(function(userData) {
                return userData; // This works if user is logged in
              })
            }, function(data) {
              // REJECTED
              console.error(data); // This part works - returns AUTH_REQUIRED if user is not logged in
              return data; // This part doesn't as it should be picked up by the .run() method
            });
          }
        ]
      }
    });
  }
])

Answer 1

要使 promise 正常工作，您必须 return 来自函数的 promise。一旦 promise 得到解决，calle 将获得可用于进一步处理的已解决数据。

所以你肯定需要 return 声明你的 authService inside resolve。

改变这个

function(authService) {
            authService.auth.$requireAuth().then(function(data) {
              // RESOLVED
              authService.GetCurrentUser().then(function(userData) {
                return userData; // This works if user is logged in
              })
            }, function(data) {
              // REJECTED
              console.error(data); // This part works - returns AUTH_REQUIRED if user is not logged in
              return data; // This part doesn't as it should be picked up by the .run() method
            });
          }

至

function(authService) {
            return authService.auth.$requireAuth().then(function(data) {
              // RESOLVED
              authService.GetCurrentUser().then(function(userData) {
                return userData; // This works if user is logged in
              })
            }, function(data) {
              // REJECTED
              console.error(data); // This part works - returns AUTH_REQUIRED if user is not logged in
              return data; // This part doesn't as it should be picked up by the .run() method
            });
          }

Answer 2

我已经设法找到了解决方案。为了让它工作，我扩展了 Shankar 的解决方案并在我的 resolve 方法中返回了每一个承诺。所以现在，它看起来像这样：

resolve: {
  "currentAuth": ["authService",
    function(authService) {
      return authService.auth.$requireAuth().then(function(data) {
        // RESOLVED
        return authService.GetCurrentUser().then(function(userData) {
          return userData;
        })
      }, function(data) {
        // REJECTED
        throw data;
      });
    }
  ]
}

如何 return Firebase 在 Angular 中被拒绝的承诺

How to return Firebase's rejected promise in Angular

angularjs

firebase