如何从Parse CloudCode查询返回一个数组

Question

我正在尝试调用Parse CloudCode函数并在响应中接收数组。不幸的是，我的iOS应用崩溃了。它认为我没有正确匹配从Parse返回类型。不幸的是，我对力的了解——我的意思是Java——是有限的。

iOS代码:

[PFCloud callFunctionInBackground:@"storyReadCount"
                   withParameters:@{}
                            block:^(NSArray *results, NSError *er)
 {
     if (er) {
         NSLog(@"the error is %@", er);
     }else{
        if (results.count > 0) {
             //iterate through results adding story objects to array
            for (int lCounter = 0; lCounter < results.count; lCounter ++) {
                PFObject *singleObject = [results objectAtIndex: lCounter];
                RSSStory *singleStory = [[RSSStory alloc] init];
                singleStory.link = [singleObject objectForKey: @"link"];
                singleStory.readCount = [singleObject objectForKey: @"count"];
                singleStory.loveCount = [singleObject objectForKey: @"heart"];
                [array addObject: singleStory];
                                        }
            _totalStoryReadCount = array;
            [[NSNotificationCenter defaultCenter] postNotificationName: @"PriorStoryCountLoaded" object: nil];
            }
     }
 }
 ];

解析CloudCode:

        //gets and returns array containing number of times each article has been read
Parse.Cloud.define("storyReadCount", function(request, response) {
                    var query = new Parse.Query("Story");
                    query.descending("createdAt");
                    query.exists("link");
                    query.limit (100);
                    query.find({
                              success: function(results) {
                              response.success(results);
                              },
                              error: function(error) {
                              response.error("Failed");
                               }
                              })
                              }
                   );

我发誓它正常工作了一天。我注释掉了if(err)else块，以验证没有逻辑错误，但崩溃发生在此之前。

崩溃错误消息似乎有所不同，但是:__NSDate UTF8String]:不可识别的选择器发送到实例的一些变化。我偶尔也会在崩溃日志中看到_NSTaggedDate。

我也试过修改:

block:^(NSArray *results, NSError *er)

block:^(NSString *results, NSError *er)

和

block:^(PFObject *results, NSError *er)

为了好玩，我试了:

block:^(NSDate *results, NSError *er)

Answer 1

下面是如何从云查询返回结果，使用promises…

Parse.Cloud.define("storyReadCount", function(request, response) {
    var query = new Parse.Query("Story");
    query.descending("createdAt");
    query.exists("link");
    query.limit (100);
    query.find().then(function(results) {
        response.success(results);
    }, function(error) {
        response.error(error);
    });
});

Answer 2

解决了我的问题:

给我的cloudCode查询添加:

        query.include("UserID");