从返回的查询数组中获取对象的值(Parse.com + Node.js)

Question

我之前使用过Parse SDK,但对于本机移动开发人员 - 包括Objective-C和Java.但是,我绝不是一个JavaScript开发人员.我正在尝试使用Node并使用Parse来存储一些用于API制作的东西.这可能是一个JavaScript无能,因为它是一个Parse问题.

应用背景

我每天都会做一个特定的twitter刮 - 一个TweetDay - 它基本上只是一个Parse行,带有一个Array值,这是一个TweetPairs数组.

TweetPair只是推文文本及其相关ID的配对.

{"id":"NCnjSDnjScn",
"text":"酷酷的约兰达,真酷!" }

//Look for a Day in the database against the day we supply
query.equalTo("createdAt", req.params.date );
query.find({
    success: function(results) {
        console.log("Successfully retrieved " + results.length + " item");
        // assume there is only ever one result
        var object = results[0];
        console.log(object.id);
        var tweetsPointer = object.get("Pairs");
        //## IT'LL BLOW UP HERE ##
        // tweetsPointer isn't a Parse object, so it doesn't know about .fetch
        tweetsPointer.fetch({
            success: function(tweets) {
                // The object was refreshed successfully.
                console.log(tweets);
                var arr = new Array();
                for (var i = 0; i < tweets.length; i++) { 
                    arr[i] = tweets[i]["text"];
                }
                // just return an array of the tweet messages for that day.
                res.send(arr);
            },
            error: function(myObject, error) {
                // The object was not refreshed successfully.
                // error is a Parse.Error with an error code and description.
            }
        });
    },
    error: function(error) {
        console.log("Error: " + error.code + " " + error.message);
        res.send("Error: " + error.code + " " + error.message);
    }
});

这就是我想要做的.通常在iOS SDK中我可以进行查询,然后在查询返回的指针上调用fetch来获取实际值(因为查询返回了PFObject指针).值得注意的是,我得到了正确的Parse对象id,而我的Pairs数组只是正确指针的集合.

我要问的是 一旦Parse查询返回一个结果(延迟加载,没有值),我该如何获取该结果的值.ie:我的查询返回一个Object,其中包含一个Parse ID数组,而不是实际值.我现在如何用值填充我的Object数组.

我目前收到的是什么

如果在上面的代码中,对于成功案例,我只返回结果对象.即:

success: function(results) {

    // assuming only ever one result
    var object = results[0];
    res.send(object);
...
}

我很高兴在浏览器中看到

{
    Pairs: [
    {
        __type: "Pointer",
        className: "TweetPair",
        objectId: "wzDNeKJO2n"
    },
    {
        __type: "Pointer",
        className: "TweetPair",
        objectId: "cwXMSPTYEb"
    },
    {
        __type: "Pointer",
        className: "TweetPair",
        objectId: "0FEPlokeIo"
    },
   ..
   ..
    ],

objectId: "5TX1Do98jY",
createdAt: "2014-04-27T07:30:51.658Z",
updatedAt: "2014-04-27T07:30:51.658Z"
}

这是我对Parse经验的期望.然而,我想要的不只是推文的指针,而是推文本身.

即:

{
    Pairs: [
    {
        id: "<twitter id>",
        text: "Be cool yolanda, be cool!"
    },
    {
        id: "sdjvbesjvhBJH",
        text: "Zeds dead baby, Zeds dead."
    },
   ..
   ..
    ],

objectId: "5TX1Do98jY",
createdAt: "2014-04-27T07:30:51.658Z",
updatedAt: "2014-04-27T07:30:51.658Z"
}

这就是.fetch通常用于的内容.即:我会在这个数组上调用.fetch,用它们的实际值(推文消息)替换指针.

我以前使用iOS SDK已经能够做到这一点,我真的只是专门询问JS SDK,我如何在结果上调用fetch.(在iOS中,结果已经是PFObject类型,所以很容易.)

解析控制台(完整性)

干杯.

Answer 1

所以我发现了一个名为.include()的方便的小方法;

代码如上

query.equalTo("createdAt", req.params.date );
    query.include("Pairs"); // <-----------------------------win
    query.find({
        success: function(results) {
        console.log("Successfully retrieved " + results.length + " item");
                //Assume one result
                var object = results[0];
                var pairs = object.get("Pairs");
                var arr = new Array();
                for (var i = 0; i < pairs.length; i++) { 
                    arr[i] = pairs[i].get("text");
                }

                res.send(arr);
                ...
}

返回推文列表,而不仅仅是推文的指针.

[
"I can feel the collingwood jealousy haha",
"@Real_Liam_Payne Now you know how i feel",
"Oh good, I feel much better, after wasting what was meant to be a study day. Classic Charle.",
"RT @NatalieTosh: Almost feel as nervous as if I was watching my own team. #ALeagueFinals #GoRoar",
"@BronB28 Feel the warmth of the ground All roads lead to us around Through endless sunsets and towns I can feel it sitting down here"
]

请参阅:https://www.parse.com/questions/javascriptjquery-pointer