ui-angular fullcalendar refresh issue

Question

I'm using ui-calendar to display events. To fill out the calendar model, the controller fetches the events from a Factory. The wierd part (which I can't figure out), is that when the Factory fetches the data from the API, the calendar shows the events just fine. However, in order to "speed things up" a little, the Factory saves the api fetched data in a local variable. If the Factory returns the data from the local variable, the calendar does not display the events. However if the Factory returns data from the API, the events are displayed just fine (so there must be something wrong with the way I am returning the local variable data from the Factory).

The Factory method is as follows:

function getAll() {
    if (!_allEventsRequiresUpdate && _allEvents) {
        var deferred = $q.defer();
        deferred.resolve(_allEvents);
        return deferred.promise;
    }
    else {
        var request = $http({
            method: "Get",
            url: baseUrl
        });
        return request.then(function (response) {
            _allEvents = response.data;
            _allEventsRequiresUpdate = false;
            return response.data;
        }, handleError);
    }

}

The _allEvents variable get filled when the data is fetched from the API. The data in both cases (returned from the API or the local variable), is exactly the same (at least to my knowledge), however, as stated previously, only the data fetched from the API gets rendered in ui-calendar/fullcalendar.

Any ideas? Is there something wrong as to how I am returning the local variable from the Factory?

BTW, in both cases, the controller resolves the promise.

UPDATE

The following is the method in the Angular controller that fetches the data from the Factory:

function getAllEvents() {
    serviceAppointmentsServices.getAll()
        .then(function (data) {
            vm.events = angular.copy(data);
            vm.fullCalendarEvents = [];

            for (var i = 0; i < vm.events.length; i++) {
                var event = {
                    id: vm.events[i].xrmId,
                    title: vm.events[i].xrmName,
                    start: moment(vm.events[i].startDate).tz('America/Santiago'),
                    end: moment(vm.events[i].endDate).tz('America/Santiago'),
                    stick: true
                }
                if (vm.events[i].xrmStatus.value == 1)
                    event.color = '#D2A15D';
                vm.fullCalendarEvents.push(event);
            }

            uiCalendarConfig.calendars["calendar"].fullCalendar('removeEventSources');
            uiCalendarConfig.calendars["calendar"].fullCalendar('addEventSource', vm.fullCalendarEvents);

        }, function (mesage) {
            toastr.error(mesage, "error!");
        });
}

Here is the calendar config:

vm.uiConfig = {
    calendar: {
        height: 450,
        editable: true,
        eventClick: editEvent,
        dayClick: addEvent,
        eventDrop: $scope.alertOnDrop,
        eventResize: $scope.alertOnResize,
        eventAfterAllRender: documentReady,
        locale: 'es',
        timezone: 'America/Santiago',
        customButtons: {
            addEvents: {
                text: 'nuevo',
                click: function () {
                    vm.fx.addEvent();
                    $scope.$apply()
                }
            }
        },
        header: {
            left: 'month basicWeek basicDay agendaWeek agendaDay',
            center: 'title',
            right: 'addEvents today prev,next'
        },
        eventRender: eventRender

    }
};

Answer 1

I'm posting the answer in case anyone else out there gets into the same issue. Thanks to @Javarome (https://stackoverflow.com/users/650104/javarome) in the post: Directive is being rendered before promise is resolved. I followed his suggestion and everything worked like a charm.

Summary: the issue was that the directive was getting fired before the promise resolved in the controller. So I followed his suggestion to wrap the directive in an ng-if (with the variable needed to be resolved as the trigger, and voila!!! Something like this:

<div class="container" ng-if="vm.fullCalendarEvents">
    <div class="calendar" ng-model="eventSources" calendar="calendar" config="uiConfig.calendar" ng-disabled="waitingForHttp" ui-calendar="vm.uiConfig.calendar" ></div>
</div>