javascript - 如何从简单的 json 制作所需的 json 树

Question

我在将简单的 json 转换为 json 树时遇到问题

我需要遵循的步骤是:

1. 找到具有 pid:0 的父级将有一些 _id:'5a016637e986c90418e96ee9'

2. 在 _id:5a016637e986c90418e96ee9 上面找到作为 pid 在其他 object 例如: 将导致_id:5a0d852ce986c9041df2aafb 和其他一些

3. 在 _id 上面找到 i,e 5a0d852ce986c9041df2aafb 等等..

这是我的 json: https://jsfiddle.net/eabangalore/26gxm6dz/5/

我想将我的 json 转换为如下所示:

[
   {
    "_id": "5a016637e986c90418e96ee9",
    "pid": "0",
    "name": "general-categories",
    "nodes":[
         {
            "priority": 3,
            "name_lower": "tragedy",
            "_id": "5a0d852ce986c9041df2aafb",
            "pid": "5a016637e986c90418e96ee9",
            "name": "Tragedy",

          "nodes":[
                {
                "priority": 3,
                "name_lower": "natural",
                "_id": "5a0d8544e986c9041df2aafd",
                "pid": "5a0d852ce986c9041df2aafb",
                "name": "natural",

                "nodes":[

                   {
                      "priority": 3,
                      "name_lower": "earthquake",
                      "_id": "5a0d85c6e986c9041df2ab02",
                      "pid": "5a0d8544e986c9041df2aafd",
                      "name": "earthquake",
                      "nodes":[]  // so on ............
                    }
                ]
              }
          ]
        }
    ]
  }
]

在这里查看输出 json，我想如何转换我的 json: https://jsfiddle.net/Resendra/0uzmoy34/

查看完整数据的 fiddle : https://jsfiddle.net/eabangalore/fzonzxjt/73/

这是我尝试过的(使用一半样本数据):

var data = [{"categories":[{"_id":"5a016637e986c90418e96ee9","pid":"0","name":"general-categories"},{"priority":3,"name_lower":"tragedy","_id":"5a0d852ce986c9041df2aafb","pid":"5a016637e986c90418e96ee9","name":"Tragedy"},{"priority":3,"name_lower":"natural","_id":"5a0d8544e986c9041df2aafd","pid":"5a0d852ce986c9041df2aafb","name":"natural"},{"priority":3,"name_lower":"humans","_id":"5a0d8544e986c9041df2aafe","pid":"5a0d852ce986c9041df2aafb","name":"humans"},{"priority":3,"name_lower":"earthquake","_id":"5a0d85c6e986c9041df2ab02","pid":"5a0d8544e986c9041df2aafd","name":"earthquake"},{"priority":3,"name_lower":"floods","_id":"5a0d85c6e986c9041df2ab03","pid":"5a0d8544e986c9041df2aafd","name":"floods"},{"priority":3,"name_lower":"drought","_id":"5a0d85c6e986c9041df2ab04","pid":"5a0d8544e986c9041df2aafd","name":"drought"},{"priority":3,"name_lower":"landslides","_id":"5a0d85c6e986c9041df2ab05","pid":"5a0d8544e986c9041df2aafd","name":"landslides"},{"priority":3,"name_lower":"tsunami","_id":"5a0d85c6e986c9041df2ab07","pid":"5a0d8544e986c9041df2aafd","name":"tsunami"},{"priority":3,"name_lower":"forest-fire","_id":"5a0d85c6e986c9041df2ab09","pid":"5a0d8544e986c9041df2aafd","name":"forest-fire"},{"priority":3,"name_lower":"strom","_id":"5a0d85c6e986c9041df2ab0a","pid":"5a0d8544e986c9041df2aafd","name":"strom"},{"priority":3,"name_lower":"cyclone","_id":"5a0d85c6e986c9041df2ab0f","pid":"5a0d8544e986c9041df2aafd","name":"cyclone"},{"priority":3,"name_lower":"cloud-burst","_id":"5a0d85c6e986c9041df2ab12","pid":"5a0d8544e986c9041df2aafd","name":"cloud-burst"},{"priority":3,"name_lower":"rape","_id":"5a0d863ce986c9041df2ab14","pid":"5a0d8544e986c9041df2aafe","name":"rape"},{"priority":3,"name_lower":"kidnap","_id":"5a0d863ce986c9041df2ab15","pid":"5a0d8544e986c9041df2aafe","name":"kidnap"},{"priority":3,"name_lower":"hijack","_id":"5a0d863ce986c9041df2ab16","pid":"5a0d8544e986c9041df2aafe","name":"hijack"},{"priority":3,"name_lower":"terror-attack","_id":"5a0d863ce986c9041df2ab17","pid":"5a0d8544e986c9041df2aafe","name":"terror-attack"},{"priority":3,"name_lower":"bomb-blast","_id":"5a0d863ce986c9041df2ab18","pid":"5a0d8544e986c9041df2aafe","name":"bomb-blast"},{"priority":3,"name_lower":"harrasment/abuse","_id":"5a0d863ce986c9041df2ab1c","pid":"5a0d8544e986c9041df2aafe","name":"harrasment/abuse"},{"priority":3,"name_lower":"dowry","_id":"5a0d863ce986c9041df2ab1d","pid":"5a0d8544e986c9041df2aafe","name":"dowry"},{"priority":3,"name_lower":"honour-killing","_id":"5a0d863ce986c9041df2ab20","pid":"5a0d8544e986c9041df2aafe","name":"honour-killing"},{"priority":3,"name_lower":"murder","_id":"5a0d863ce986c9041df2ab21","pid":"5a0d8544e986c9041df2aafe","name":"murder"},{"priority":3,"name_lower":"sucide","_id":"5a0d8652e986c9041df2ab26","pid":"5a0d8544e986c9041df2aafe","name":"sucide"},{"priority":3,"name_lower":"roads","_id":"5a0d8670e986c9041df2ab28","pid":"5a016637e986c90418e96ee9","name":"Roads"},{"priority":3,"name_lower":"traffic","_id":"5a0d868ce986c9041df2ab2a","pid":"5a0d8670e986c9041df2ab28","name":"traffic"},{"priority":3,"name_lower":"state","_id":"5a0d868ce986c9041df2ab2b","pid":"5a0d8670e986c9041df2ab28","name":"state"},{"priority":3,"name_lower":"national","_id":"5a0d868ce986c9041df2ab2c","pid":"5a0d8670e986c9041df2ab28","name":"national"},{"priority":3,"name_lower":"budget","_id":"5a0d868ce986c9041df2ab2d","pid":"5a0d8670e986c9041df2ab28","name":"budget"},{"priority":3,"name_lower":"accidents","_id":"5a0d868ce986c9041df2ab2e","pid":"5a0d8670e986c9041df2ab28","name":"accidents"},{"priority":3,"name_lower":"trafficking","_id":"5a0d869fe986c9041df2ab34","pid":"5a0d8544e986c9041df2aafe","name":"trafficking"},{"priority":3,"name_lower":"animals","_id":"5a0d86aae986c9041df2ab36","pid":"5a0d869fe986c9041df2ab34","name":"animals"},{"priority":3,"name_lower":"human","_id":"5a0d86aae986c9041df2ab37","pid":"5a0d869fe986c9041df2ab34","name":"human"},{"priority":3,"name_lower":"railways","_id":"5a0d86c9e986c9041df2ab3a","pid":"5a016637e986c90418e96ee9","name":"Railways"},{"priority":3,"name_lower":"north","_id":"5a0d86d6e986c9041df2ab3c","pid":"5a0d86c9e986c9041df2ab3a","name":"North"},{"priority":3,"name_lower":"east","_id":"5a0d86d6e986c9041df2ab3d","pid":"5a0d86c9e986c9041df2ab3a","name":"east"},{"priority":3,"name_lower":"south","_id":"5a0d86d6e986c9041df2ab3e","pid":"5a0d86c9e986c9041df2ab3a","name":"south"},{"priority":3,"name_lower":"west","_id":"5a0d86d6e986c9041df2ab3f","pid":"5a0d86c9e986c9041df2ab3a","name":"west"},{"priority":3,"name_lower":"central","_id":"5a0d86d6e986c9041df2ab40","pid":"5a0d86c9e986c9041df2ab3a","name":"central"},{"priority":3,"name_lower":"budget","_id":"5a0d86e2e986c9041df2ab46","pid":"5a0d86c9e986c9041df2ab3a","name":"budget"},{"priority":3,"name_lower":"nature","_id":"5a12c1c7e986c90418cefdfd","pid":"5a016637e986c90418e96ee9","name":"Nature"},{"priority":3,"name_lower":"animals","_id":"5a12c1d8e986c90418cefdff","pid":"5a12c1c7e986c90418cefdfd","name":"Animals"},{"priority":3,"name_lower":"humans","_id":"5a12c1d8e986c90418cefe00","pid":"5a12c1c7e986c90418cefdfd","name":"Humans"},{"priority":3,"name_lower":"amphibians animals","_id":"5a12c277e986c90418cefe03","pid":"5a12c1d8e986c90418cefdff","name":"Amphibians animals"},{"priority":3,"name_lower":"tresstrial animals","_id":"5a12c277e986c90418cefe04","pid":"5a12c1d8e986c90418cefdff","name":"Tresstrial animals"},{"priority":3,"name_lower":"aquatic animals","_id":"5a12c277e986c90418cefe05","pid":"5a12c1d8e986c90418cefdff","name":"Aquatic animals"},{"priority":3,"name_lower":"arial animals","_id":"5a12c277e986c90418cefe06","pid":"5a12c1d8e986c90418cefdff","name":"Arial animals"},{"priority":3,"name_lower":"child","_id":"5a12c2c7e986c90418cefe0f","pid":"5a12c1d8e986c90418cefe00","name":"Child"},{"priority":3,"name_lower":"baby","_id":"5a12c2c7e986c90418cefe10","pid":"5a12c1d8e986c90418cefe00","name":"Baby"},{"priority":3,"name_lower":"adult","_id":"5a12c2c7e986c90418cefe11","pid":"5a12c1d8e986c90418cefe00","name":"Adult"},{"priority":3,"name_lower":"female","_id":"5a12c2d4e986c90418cefe15","pid":"5a12c2c7e986c90418cefe11","name":"female"},{"priority":3,"name_lower":"male","_id":"5a12c2d4e986c90418cefe16","pid":"5a12c2c7e986c90418cefe11","name":"male"},{"priority":3,"name_lower":"male","_id":"5a12c2d9e986c90418cefe19","pid":"5a12c2c7e986c90418cefe10","name":"male"},{"priority":3,"name_lower":"female","_id":"5a12c2d9e986c90418cefe1a","pid":"5a12c2c7e986c90418cefe10","name":"female"},{"priority":3,"name_lower":"female","_id":"5a12c2dde986c90418cefe1d","pid":"5a12c2c7e986c90418cefe0f","name":"female"},{"priority":3,"name_lower":"male","_id":"5a12c2dde986c90418cefe1e","pid":"5a12c2c7e986c90418cefe0f","name":"male"},{"priority":3,"name_lower":"politics","_id":"5a12c2ebe986c90418cefe21","pid":"5a016637e986c90418e96ee9","name":"Politics"},{"priority":3,"name_lower":"bjp","_id":"5a12c321e986c90418cefe23","pid":"5a12c2ebe986c90418cefe21","name":"BJP"},{"priority":3,"name_lower":"aidmk","_id":"5a12c321e986c90418cefe24","pid":"5a12c2ebe986c90418cefe21","name":"AIDMK"},{"priority":3,"name_lower":"bsp","_id":"5a12c321e986c90418cefe25","pid":"5a12c2ebe986c90418cefe21","name":"BSP"},{"priority":3,"name_lower":"congress","_id":"5a12c321e986c90418cefe26","pid":"5a12c2ebe986c90418cefe21","name":"Congress"},{"priority":3,"name_lower":"aap","_id":"5a12c321e986c90418cefe27","pid":"5a12c2ebe986c90418cefe21","name":"AAP"},{"priority":3,"name_lower":"dmk","_id":"5a12c321e986c90418cefe28","pid":"5a12c2ebe986c90418cefe21","name":"DMK"},{"priority":3,"name_lower":"others","_id":"5a12c322e986c90418cefe2b","pid":"5a12c2ebe986c90418cefe21","name":"Others"},{"priority":3,"name_lower":"government","_id":"5a12c32fe986c90418cefe31","pid":"5a016637e986c90418e96ee9","name":"Government"},{"priority":3,"name_lower":"state government","_id":"5a12c33be986c90418cefe33","pid":"5a12c32fe986c90418cefe31","name":"State government"},{"priority":3,"name_lower":"central government","_id":"5a12c33be986c90418cefe34","pid":"5a12c32fe986c90418cefe31","name":"Central government"},{"priority":3,"name_lower":"president rule","_id":"5a12c361e986c90418cefe39","pid":"5a12c32fe986c90418cefe31","name":"President rule"},{"priority":3,"name_lower":"president","_id":"5a12c38fe986c90418cefe3b","pid":"5a12c33be986c90418cefe34","name":"President"},{"priority":3,"name_lower":"elections","_id":"5a12c38fe986c90418cefe3c","pid":"5a12c33be986c90418cefe34","name":"Elections"},{"priority":3,"name_lower":"prime-minister","_id":"5a12c38fe986c90418cefe3d","pid":"5a12c33be986c90418cefe34","name":"Prime-Minister"},{"priority":3,"name_lower":"parilament","_id":"5a12c38fe986c90418cefe3e","pid":"5a12c33be986c90418cefe34","name":"Parilament"},{"priority":3,"name_lower":"mps","_id":"5a12c390e986c90418cefe3f","pid":"5a12c33be986c90418cefe34","name":"MPS"},{"priority":3,"name_lower":"mla","_id":"5a12c390e986c90418cefe40","pid":"5a12c33be986c90418cefe34","name":"MLA"},{"priority":3,"name_lower":"home-minister","_id":"5a12c3d5e986c90418cefe47","pid":"5a12c33be986c90418cefe33","name":"home-minister"},{"priority":3,"name_lower":"railway-minister","_id":"5a12c3d5e986c90418cefe49","pid":"5a12c33be986c90418cefe33","name":"railway-minister"},{"priority":3,"name_lower":"mps","_id":"5a12c3d5e986c90418cefe4a","pid":"5a12c33be986c90418cefe33","name":"MPs"},{"priority":3,"name_lower":"governer","_id":"5a12c3d5e986c90418cefe4b","pid":"5a12c33be986c90418cefe33","name":"Governer"},{"priority":3,"name_lower":"elections","_id":"5a12c3d5e986c90418cefe4c","pid":"5a12c33be986c90418cefe33","name":"Elections"},{"priority":3,"name_lower":"mla","_id":"5a12c3d5e986c90418cefe4d","pid":"5a12c33be986c90418cefe33","name":"MLA"},{"priority":3,"name_lower":"cheif-minister","_id":"5a12c3d5e986c90418cefe4e","pid":"5a12c33be986c90418cefe33","name":"Cheif-Minister"}]}]



function getParentObject(parentObj){

     var allParentObject = parentObj.filter(function(o){
        return o.parent == 0;
     });
     
     return allParentObject;
}

function getAllParentIds(allParentObject){

    var allActualParentIds = allParentObject.map(obj =>  obj._id);
    
    return allActualParentIds;
}

function getAllSubChilds(subchild){
    
    var subChildObject = subchild.filter(function(o,i){
        return o._id == subchild[i]._id;  
     });
     
     return subChildObject;
 }


function findNestedObjects(data,allParentObject,ActualParentId){
   
   var firstChild = getParentObject(data);
   
   var allActualParentIds = getAllParentIds(firstChild);
   
   var obj = {};
   
   
   //console.log('all childs', JSON.stringify(firstChild));
  
   
   if(firstChild.length){
        
        //allParentObject.nodes = firstChild;
        
        var subChildObject = getAllSubChilds(firstChild);
        
        console.log('sub child object ',JSON.stringify(subChildObject));
        
        var subChildIds = getAllParentIds(subChildObject);
        
        //onsole.log('all parent nodes ',JSON.stringify(allParentObject));
        
        //findNestedObjects(data,firstChild,ActualParentId);
   }else{
   
      allParentObject.nodes = [];  
   }
       
}

var allParentObject = getParentObject(data);

var allActualParentIds = getAllParentIds(allParentObject);


for(var i=0;i<allActualParentIds.length;i++){
  findNestedObjects(data,allParentObject[i],allActualParentIds[i]);  
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

查看完整数据的 fiddle : https://jsfiddle.net/eabangalore/fzonzxjt/73/

请提前帮助我谢谢!!!

Answer 1

这是构建这棵树的简单递归算法(我创建了您的数据的简化版本，但一切似乎都运行良好):

function setNodes(obj, data) {
	obj.nodes = data.filter(x => x.pid === obj._id);
}

function populateLevel(arr, data) {
  arr.forEach(x => {
    setNodes(x, data);
    if (x.nodes.length) {
    	populateLevel(x.nodes, data);
    }
  });
}

const json = [{
  "categories": [
  	{
      "_id": "1",
      "pid": "0",
      "name": "general-categories"
    }, {
      "priority": 3,
      "name_lower": "tragedy",
      "_id": "2",
      "pid": "1",
      "name": "Tragedy"
    }, {
      "priority": 3,
      "name_lower": "natural",
      "_id": "3",
      "pid": "1",
      "name": "natural"
    }, {
      "priority": 3,
      "name_lower": "humans",
      "_id": "4",
      "pid": "2",
      "name": "humans"
    }, {
      "priority": 3,
      "name_lower": "earthquake",
      "_id": "5",
      "pid": "2",
      "name": "earthquake"
    }, {
      "priority": 3,
      "name_lower": "floods",
      "_id": "6",
      "pid": "3",
      "name": "floods"
    }, {
      "priority": 3,
      "name_lower": "drought",
      "_id": "7",
      "pid": "3",
      "name": "drought"
    }, {
      "priority": 3,
      "name_lower": "landslides",
      "_id": "8",
      "pid": "6",
      "name": "landslides"
    }, {
      "priority": 3,
      "name_lower": "tsunami",
      "_id": "9",
      "pid": "6",
      "name": "tsunami"
    }]
}];

const data = json[0].categories;
const startingLevel = data.filter(x => x.pid === '0');

populateLevel(startingLevel, data);

console.log(startingLevel);

这是一个 jsfiddle:https://jsfiddle.net/ww71otLv/