Question

队

我正在使用mongodb和spring数据。

我从mongodb到聚合（组）得到了一些结果。现在我想通过json数组将多行组转换为单个json文档，如下所示

FROM：

{ "count" : 8,  "SERVICE" : "ABC", "BUCKET" : "1", "TIME" : "16100106" }
{ "count" : 8,  "SERVICE" : "ABC", "BUCKET" : "1", "TIME" : "16100107" }
{ "count" : 8,  "SERVICE" : "ABC", "BUCKET" : "2", "TIME" : "16100108" }
{ "count" : 10, "SERVICE" : "XYZ", "BUCKET" : "1", "TIME" : "16100106" }
{ "count" : 10, "SERVICE" : "XYZ", "BUCKET" : "1", "TIME" : "16100107" }
{ "count" : 10, "SERVICE" : "XYZ", "BUCKET" : "2", "TIME" : "16100108" }

TO：

{
   "ABC" : {                       //SERVICE
            1: {                   //BUCKET
                16100106 : 8,      //TIME:count
                16100107 : 8
            },
            2: {
                16100108 : 8
            },
         },
   "XYZ" : {
            1: {
                16100106 : 10,
                16100107 : 10
            },
            2: {
                16100108 : 10
            },
         }

}

复杂性：

列数将更改（在$ groupby / $项目中添加新列）
应该能够通过订单，当前示例显示的顺序如

SERVICE --> BUCKET --> TIME --> count，

但这应该像
一样可以改变
TIME --> BUCKET --> SERVICE --> count

因此寻找支持这个的任何通用库？或任何建议？

Answer 1

我是使用Stack Overflow的新手，我很高兴为了得到一个灵感而贡献我的想法。

我不知道它如何与mongodb一起工作，但是如果你使用node.js，你可以使用Array扩展一个函数，就像这样

Array.prototype.converGroupToSingle = function(){
    var r = {}
    this.forEach(function(s){
         //not have SERVICE
        ;(r[s.SERVICE] || (r[s.SERVICE] = {[s.BUCKET]:{[s.TIME]:s.count}},false))
        //have SERIVCE
        && (
            // not have BUCKET
            (r[s.SERVICE][s.BUCKET] || (r[s.SERVICE][s.BUCKET] = {[s.TIME]:s.count},false))
            //have BUKCET but not have TIME
            && (r[s.SERVICE][s.BUCKET][s.TIME] || (r[s.SERVICE][s.BUCKET][s.TIME] = s.count,false))
        )
    })
    return r
}

并使用它，就像这样

var arrGroup = [
    { "count" : 8,  "SERVICE" : "ABC", "BUCKET" : "1", "TIME" : "16100106" }
    ,{ "count" : 8,  "SERVICE" : "ABC", "BUCKET" : "1", "TIME" : "16100107" }
    ,{ "count" : 8,  "SERVICE" : "ABC", "BUCKET" : "2", "TIME" : "16100108" }
    ,{ "count" : 10, "SERVICE" : "XYZ", "BUCKET" : "1", "TIME" : "16100106" }
    ,{ "count" : 10, "SERVICE" : "XYZ", "BUCKET" : "1", "TIME" : "16100107" }
    ,{ "count" : 10, "SERVICE" : "XYZ", "BUCKET" : "2", "TIME" : "16100108" }
]

var singleGroup = arrGroup.converGroupToSingle()

如果你输出singleGroup，就像这样

// the singleGroup
{
ABC:
    {
        '1': { '16100106': 8, '16100107': 8 },
        '2': { '16100108': 8 }
    },
XYZ:
    {
        '1': { '16100106': 10, '16100107': 10 },
        '2': { '16100108': 10 }
    }
}

希望它可以帮到你。

感谢。

将json数组文档转换为单个json文档

1 个答案: