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我一直在将来自 theJIT.org 的 spacetree 插件用于我正在从事的项目，但在用户想要的新功能方面遇到了麻烦。

我编写了一个小脚本来查询数据库中的员工，看看他们是否有向他们报告的人，如果有，则打印 1，否则打印 0。我为 spacetree 插件设置 json 字符串的代码对现在看起来像这样（它有点乱，但我只是想在我把它全部清理干净之前让它工作）：

// Returns either 0 or 1 for if a person has direct reports, used in hierarchy below
function checkManager(empid){
    return $.ajax({
        url: path + 'CorpDir_CheckManager.cfm?Empid='+empid,
        datatype: 'text',
        success: (function (mng) {
            console.log(mng + " " + empid); //This works, but ends up being after the string is built
            return mng;
        }),
        error: (function (){
            alert("ERROR!");
        })
    });
}

//Setting up the JSON for the hierarchy tree. 
function startTree() {

    // Clear all other trees on the page
    for (var i = 0; i < 50; i++) {
        $('#hier' + i + '-canvaswidget').remove();
    }
    var json = '';
    jQuery.getJSON(path + 'CorpDir_ReportingChain.cfm?Empid=' + empid, function (data) {// JSON from reporting chain is data
        jQuery.getJSON(path + 'CorpDir_Subordinate.cfm?Empid=' + empid, function (data2) {  // JSON from subordinate is data2
            // Check to see if there is even a reporting chain
            if(data.DATA.length > 0){
                // This is pretty much magic, it took me a while to work it all out. 
                // This first for loop goes through the information from Reporting Chain, turning into the json that the hierarchy uses
                for (var i = data.DATA.length - 1; i >= 0; i--) {
                    json = json + 'id: "' + data.DATA[i][3].replace(/\s/g, '') + '",name: "' + data.DATA[i][0].replace(/\s/g, '') + '<br>' + data.DATA[i][1].replace(/\s/g, '') + '",data: {xid: "' + data.DATA[i][6].replace(/\s/g, '') + '", "parentnode": "1"},children: [{';
                }
            }
            // This appends the current person to the hierarchy (and will later be set to the root node for it)
            var mng = checkManager(empid); //results in [object Object] instead of 1 or 0
            json = json + 'id: "' + empid + '",name: "' + fname + '<br>' + lname + '",data: {xid: "' + commitid.replace(/\s/g, '') + '", "parentnode":"' + mng + '"},children: [';
            // These are the child nodes (from subordinate JSON date), set up to what the hierarchy wants for it.
            for (var i = 0; i < data2.DATA.length; i++) {
                if ( data2.DATA[i][4].replace(/\s/g, '') != empid ){
                    mng = checkManager(data2.DATA[i][4].replace(/\s/g, ''));
                    json = json + '{id: "' + data2.DATA[i][4].replace(/\s/g, '') + '",name: "' + data2.DATA[i][0] + '<br>' + data2.DATA[i][1] + '",data: {xid: "' + data2.DATA[i][6].replace(/\s/g, '') + '", "parentnode":"' + mng + '"},children: []},';
                }
                // IE doesn't always play well if there's a comma at the end of a list, so this cuts it off if it's there
                if (i === data2.DATA.length - 1) {
                    json = json.slice(0, -1);
                }
            }
            json = json + ']';
            // This finishes up the JSON string, closing off all the brackets left open from setting up the reporting chain
            for (var i = data.DATA.length; i > 0; i--) {
                json = json + '}]';
            }
            json = '{' + json + '}';
            console.log(json);
            // Give all the information we need to the spacetree so we can load up that hierarchy
            jitSpaceTree(json, index, empid);
        });
    });
}

显然，假设它会等待该 ajax 调用的返回是一个坏主意（很高兴它在调用该函数之后继续前进：/），在那里获取这些信息的最佳方法是什么？更改获取报告和从属链的调用只是部分解决方案，因为我仍然需要检查当前用户（在中间添加的用户）。

这样做的正确方法是什么？我必须在 for 循环中进行异步调用或重写大量代码是我现在看到的唯一方法。

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