承诺内的angular.foreach

Question

我正在尝试创建一个返回承诺的函数，并且在该函数内部，我有一个angular.forEach返回承诺。 这是示例代码：

function func1() {
    func2(demoText, demoObject).then(function(response) {
        console.log(response);
    });
}

function func2(demoText, demoObject) {
    var deferred = $q.defer();
    var returnString = "someReturnString";
    var keepGoing = true;
    var loopPromises = [];

    angular.forEach(demoObject, function(value, key) {
        if(keepGoing) {
            var deferred2 = $q.defer();
            loopPromises.push(deferred2.promise);

            if(value.type == 'other') {
                someService.getDataFromServer()
                .then(function(serverResponse) {
                    returnString = serverResponse;
                    deferred2.resolve();
                });
                keepGoing = false;
            }
            else {
                deferred2.resolve();
            }                                        
        }
    });

    return $q.all(loopPromises).then(function () {
        deferred.resolve(returnString);
        return deferred.promise;
    });
}

现在返回的值是“ someReturnString”，这意味着在我从服务器获取结果之前，已对该值进行了重新调整。

如何解决？