How to get value from resolved defer Angularjs

Question

i am creating android application using ionic and angularjs and using window.requestFileSystem for get image from storage. So for this process i used $q.defer() for asynchronous process and its working fine and showing object in console: console.log(deferred.promise)

but now, when i am trying to get the value from deferred.promise like

var vals = deferred.promise;
console.log(vals.$$state.value);

its showing undefined. Can anyone tell me how i can get that value?

My Code:

var deferred = $q.defer();
    document.addEventListener("deviceready", function() {
        window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function (fileSystem) {
            imagePath = fileSystem.root.toURL() + 'SmaartMedia/' + splited[splitedLength-1];
            deferred.resolve(imagePath);
            $rootScope.$apply();
        });
    }, false);
    var vals = deferred.promise;
    console.log(vals.$$state.value);

Thanks

Amygdaloideum · Accepted Answer · 2016-09-07 06:53:08Z

4

function getStuff() {
  var deferred = $q.defer();
  document.addEventListener("deviceready", function () {
    window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function (fileSystem) {
      imagePath = fileSystem.root.toURL() + 'SmaartMedia/' + splited[splitedLength - 1];
      deferred.resolve(imagePath);
      $rootScope.$apply();
    });
  }, false);
  return deferred.promise;
}

//Get value like this
getStuff().then(function(response){
  //Use value here
});

answered Sep 7, 2016 at 6:53

Amygdaloideum

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1 Comment

Eigi Over a year ago

Not correct, look at the eventListener. defer should be inside. And i also don't think it's really working, because the eventListener will not be executed in this function, it only get registered. Nothing more. So the return won't work either. There is no nice way to achieve his goal, because of the eventListener.

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