AngularJS: Returning a promise from within.

Question

I have a user service. I would like to create a method that uses another service that I created. There are two methods on this service. getUser()and getCurrentUser(). getCurrentUser()uses an introduced service that receives a UID. It uses the returned UID to run the method getUser(). My problem is that I can’t get getCurrentUser()to return a second level promise.

This question is a little difficult to explain. Here is the code ...

svs.service("usersService", function($rootScope, $http, loginService, alertBoxService) {
  var self = this;
  self.getUser = function(identifier, column) {
    if (typeof(column) === 'undefined') column = "uid";
    return $http.get($rootScope.api + "/getUser/" + identifier + "/" + column);
  }
  self.getCurrentUser = function() {
    var currentUserPromise;
    loginService.getCurrentUid().then(
      function(response) {
        if (response.data === "false") {
          alertBoxService.trigger($rootScope.unexpectedApiResponse);
        } else {
          console.log(self.getUser(response.data));
          currentUserPromise = self.getUser(response.data);
        }
      }, function(response) {
        alertBoxService.trigger($rootScope.asyncFailed);
      }
    );
    return currentUserPromise;
  }
});

Answer 1

Set up a chain of promises, but don't forget to turn off the deviations too ...

self.getCurrentUser = function() {
    return loginService.getCurrentUid().then(function(response) {
        if (response.data === 'false') {
            alertBoxService.trigger($rootScope.unexpectedApiResponse);
            return $q.reject(response); // convert into a rejection
        }
        return self.getUser(response.data); // chain the promise resolution
    }, function(response) {
        alertBoxService.trigger($rootScope.asyncFailed);
        return $q.reject(response); // chain the rejections
    });
}

, , $q.

---

, , $q.reject,

throw response;

Answer 2

, getCurrentUser undefined. , undefined. , return loginService.

Answer 3

async, , , , , .

.

  svs.service("usersService", function($rootScope, $http, loginService, alertBoxService) {
  var self = this;
  self.getUser = function(identifier, column) {
    if (typeof(column) === 'undefined') column = "uid";
    return $http.get($rootScope.api + "/getUser/" + identifier + "/" + column);
  }
  self.getCurrentUser = function() {
    return loginService.getCurrentUid().then(
      function(response) {
        if (response.data === "false") {
          alertBoxService.trigger($rootScope.unexpectedApiResponse);
        } else {
          console.log(self.getUser(response.data));
          return self.getUser(response.data);
        }
      }, function(response) {
        alertBoxService.trigger($rootScope.asyncFailed);
      }
    );
  }
});