如何将嵌入的 JSON 扁平化到多个文档中答案

【问题标题】：How to flatten up embedded JSON into multiple documents如何将嵌入的 JSON 扁平化到多个文档中
【发布时间】：2013-10-07 10:23:08
【问题描述】：

考虑以下 JSON：

{
    "Company" : "ABC Company",
    "Place"   : {
                   "Bangalore" :{ 
                                    "Address" : "MG Road",  
                                    "Phone"   : ["988888","888866","365656"]
                                },
                   "Mubmai" :   { 
                                    "Address" : "1st Main Road,West",  
                                    "Phone"   : ["21212","123123","544455"]
                                }
                }
}

现在我想将 JSON 展平，以便获得多个 JSON。对于上面的例子，扁平化的输出如下：

{
    "Company" : "ABC Company",
    "Place"   : "Bangalore",
    "Address" : "MG Road",
    "Phone"   : "988888"
},    
{
    "Company" : "ABC Company",
    "Place"   : "Bangalore",
    "Address" : "MG Road",
    "Phone"   : "888866"
},    
{
    "Company" : "ABC Company",
    "Place"   : "Bangalore",
    "Address" : "MG Road",
    "Phone"   : "365656"
},    
{
    "Company" : "ABC Company",
    "Place"   : "Mubmai",
    "Address" : "1st Main Road,West",
    "Phone"   : "21212"
},    
{
    "Company" : "ABC Company",
    "Place"   : "Mubmai",
    "Address" : "1st Main Road,West",
    "Phone"   : "123123"
},    
{
    "Company" : "ABC Company",
    "Place"   : "Mubmai",
    "Address" : "1st Main Road,West",
    "Phone"   : "544455"
}

而且 JSON 结构不是固定的，它往往会发生变化，但扁平化仍然必须以相同的方式工作。有没有办法在 Node.js 中做到这一点？

【问题讨论】：

如果 JSON 结构发生变化，那么我看不出扁平化它的逻辑是如何相同的。
这不仅仅是扁平化。您还在阵列上展开/迭代。如果您的 JSON 中有多个数组怎么办。
“有什么最好的方法吗？”你试过什么方法？
使用JSON.parse、isPlainObject、hasOwnProperty、recursion。现在开始挖掘。

标签： javascript json node.js

【解决方案1】：

你去：(jsb)

var t = [];
for (p in a.Place)
{
    var _=a.Place[p]["Phone"];
    for (i = 0; i < _.length; i++)
    {
        var g = {
                  Company: a.Company,
                  Place: p,
                  Address: a.Place[p]["Address"]
                };
        g.Phone = _[i];
        t.push(g)
    }
}

如果你添加

console.log(JSON.stringify(t)

你会得到这个

    [{"Company":"ABC Company","Place":"Bangalore","Address":"MG Road","Phone":"988888"},{"Company":"ABC Company","Place":"Bangalore","Address":"MG Road","Phone":"888866"},{"Company":"ABC Company","Place":"Bangalore","Address":"MG Road","Phone":"365656"},{"Company":"ABC Company","Place":"Mubmai","Address":"1st Main Road,West","Phone":"21212"},{"Company":"ABC Company","Place":"Mubmai","Address":"1st Main Road,West","Phone":"123123"},{"Company":"ABC 
Company","Place":"Mubmai","Address":"1st Main Road,West","Phone":"544455"}]

【讨论】：

这假设 OP 正在使用 Jquery，问题中未指定一些内容，因为他正在使用 Node。