使用嵌套查询的云工作承诺

我在Parse.com上有一个游戏，用户提交意见，其他玩家投票。

我正试图写一个云后台作业来更新我的所有用户的帐户与投票总数，这是从他们的每个提交的投票总数的总和。

我已经尝试了大约5种不同的方法，不能得到嵌套查询运行(更不用说更新和保存)。

这里是文档和一个有用的博客文章…

https://parse.com/docs/js_guide promises-creation

http://blog.parse.com/2013/01/29/whats-so-great-about-javascript-promises/

这是我的最新消息，任何帮助都是非常感谢的。

编辑:感谢@axymous让我清楚地看到，我需要显式地创建并立即返回承诺，然后在回调中解决它。

Parse.Cloud.job("calculateUserTotals", function(request, status) {
    Parse.Cloud.useMasterKey();
    var query = new Parse.Query(Parse.User);
    query.find().then(function(users) {
        var promises = [];
        _.each(users, function(user) {
            promises.push((function(user){
                var promise = new Parse.Promise();
                console.log(user.toJSON().objectId);  // user objectId is correct here
                var submissionQuery = new Parse.Query('submission');
                submissionQuery.equalTo('user', user.toJSON().objectId);
                submissionQuery.find({  // this doesnt seem to ever run, i have tried .each as well
                    success: function(submissions) {
                        var votes = 0;
                        for (var i=0; i<submissions.length; i++) {
                            var submission = submissions[i];
                            votes = votes + submission.get('votes').length;
                        }
                        user.set('submission_count', submissions.length);
                        user.set('vote_count', votes);
                        user.save({
                            success: function(user) {
                                promise.resolve();
                            }
                        });
                    },
                    error: function(error) {
                        status.error(error);
                    }
                });
                return promise;
            })(user));
        });
        return Parse.Promise.when(promises);
    })
    .then(function() {
        status.success('leaderboard updated.');
    });
});

Parse.Cloud.job("calculateUserTotals", function(request, status) {
    Parse.Cloud.useMasterKey();
    var query = new Parse.Query(Parse.User);
    query.find().then(function(users) {
        var promises = [];
        _.each(users, function(user) {
            promises.push((function(user){
                var promise = new Parse.Promise();
                console.log(user.toJSON().objectId);  // user objectId is correct here
                var submissionQuery = new Parse.Query('submission');
                submissionQuery.equalTo('user', user.toJSON().objectId);
                submissionQuery.find({  // this doesnt seem to ever run, i have tried .each as well
                    success: function(submissions) {
                        var votes = 0;
                        for (var i=0; i<submissions.length; i++) {
                            var submission = submissions[i];
                            votes = votes + submission.get('votes').length;
                        }
                        user.set('submission_count', submissions.length);
                        user.set('vote_count', votes);
                        user.save({
                            success: function(user) {
                                promise.resolve();
                            }
                        });
                    },
                    error: function(error) {
                        status.error(error);
                    }
                });
                return promise;
            })(user));
        });
        return Parse.Promise.when(promises);
    })
    .then(function() {
        status.success('leaderboard updated.');
    });
});