为什么我的Jquery ajax成功处理程序是用数组调用的（而不是响应对象） [英] Why is my Jquery ajax success handler being called with an array (and not the response object)

问题描述

我有一个功能，可以对谷歌电子表格API进行两次休息调用。我使用$ .when来确保第一次调用的数据在处理第二次调用的数据之前处理。

I have a function which makes two rest calls to the google spreadsheetAPI. I use a $.when to make sure that the data fron thefirst call is process before dealing with the data from the second call.

问题是第一个ajax处理程序（getRealNames），接收一个javascript对象作为其参数，但第二个处理程序（displayTeams）接收一个数组，第0个元素是我期望得到的对象。

The problem is that the first ajax handler(getRealNames), receives a javascript object as its argument, but the second handler(displayTeams), receives an array, the 0th element is the object I was expecting to get.

为什么一个人获得一个对象而另一个获得一个数组？他们正在呼唤同样的休息api。
直到我重构代码以使用延迟而不是回调嵌套，数组才出现。所以我认为这是一个jquery问题，而不是一个spreadsheetAPI问题。

Why does one get an object and the other get an array? They are calling the same rest api. The array did not appear until I refactored the code to use deferreds instead of callback nesting. So I think this is a jquery question rather than a spreadsheetAPI question.

（参见下面的屏幕截图，我已经控制了两个处理程序收到的参数。 / p>

(see screen shot below, I've console.log'ed the arguments received by both handlers

//this is the function generating the REST requests, I just put it in for completeness
function getWorkSheet(doc_key,sheet){
  return $.get('https://spreadsheets.google.com/feeds/list/'+
    doc_key+'/'+sheet+
    '/private/full?alt=json&access_token=' 
    + googleAPItoken)
    .fail(function(){
      alert("failed to get google doc:"+doc_key+" ,sheet: "+sheet);
    });

  }

 function getRWMTeams() {
    var nameQuery=getWorkSheet(doc_key,1);
    nameQuery.done(getRealNames);

    var repoQuery=getWorkSheet(doc_key,2);

    //the deferred:'namesProcessed' is resolved in getRealNames
    $.when(repoQuery,namesProcessed)
      .done(displayTeams);

  }

推荐答案

最后，仔细阅读api doc（ http://api.jquery.com/jQuery.when/ ）在代码示例中显示以下注释;

Eventually, more careful reading of the api doc(http://api.jquery.com/jQuery.when/) revealed the following comment in a code sample;

// a1 and a2 are arguments resolved for the page1 and page2 ajax requests, respectively.
// Each argument is an array with the following structure: [ data, statusText, jqXHR ]

<我读过第一条评论，并假设参数只是返回数据。第二条评论揭示了我的问题的根源。

I had read the first comment, and assumed that the arguments were simply the return data. The second comment reveals the source of my problem.

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