angular.js deferred doesnt work in callback

Question

Consider the following example:

    .service('movieGetter', ['$q', '$timeout', function ($q, $timeout) {
    this.getData = function () {
        var deferred = $q.defer();
        $timeout(function(){
            mock.getData(function(data){
                deferred.resolve(data);
            });
        }, 2000);

        return deferred.promise;
    };
}]);

For some reason this code doesn't work, when the line deferred.resolve() fires the callback at then in the constroller does't

On the other hand tthis example works fine:

    .service('movieGetter', ['$q', '$timeout', function ($q, $timeout) {
    this.getData = function () {
        var deferred = $q.defer();
        $timeout(function () {

            deferred.resolve('test');
        }, 2000);

        return deferred.promise;
    };
}]);

Fow some reason when the deferred.resolve() fires inside callback the then callback on the constroller doesn't work.

Any ideas?

Thanks!

When you say 'doesn't work' do you have an error message? If so could you update the question with the message? — MaxWillmott, May 31 '13 at 15:02

score 14 · Accepted Answer · answered Jun 01 '13 at 18:17

14

As it appears, the promise API in angular is part of the scope and thus, when calling resolve inside callback angular is not in the $apply cycle and it's unaware of the function call.

To resolve this $scope.$apply() should be called right after the resolve function. If in service, and the $scope injectable is unavailable you can inject $rootScope instead.

answered Jun 01 '13 at 18:17

Dimkin

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2

You can accept your own answers and you should if they solved the problem. – schlingel Jul 30 '13 at 12:57
1

Thanks a lot I've struggled with this one all morning! – iamjonesy Aug 02 '13 at 13:06
1

when i pass the scope and do apply after the deferred.resolve(answer); i get: Error: [$rootScope:inprog] $digest already in progress .... Please help. – Mike Dec 10 '15 at 08:23

angular.js deferred doesnt work in callback

1 Answers1