从深层嵌套对象内的值获取父键和祖父母键 [英] Get parent and grandparent keys from a value inside a deep nested object

问题描述

我有一个深层嵌套的JavaScript对象，并且知道一个值位于该对象的最低位置.我想知道父密钥和祖父母密钥.

I’ve got a deep nested JavaScript Object and I know a value which is at the object’s lowest position. I want to know the parent key and grandparent key.

我设置了一个jsbin https://jsbin.com/yimugezuxe/edit?js,console

I set up a jsbin https://jsbin.com/yimugezuxe/edit?js,console

基于值"uniqueID#9aserdf"，我想知道/返回其父键:下一个对象的阶段2"和级别2":

Based on the value 'uniqueID#9aserdf' I want to know/return its parent keys: 'Stage 2' and 'Level 2' from the object below:

const obj = {
    "Level 1": {
        "Stage 1": [
        {
            "title": "Parent 1",
            "id": "Parent1#id",
            "Children": [
            {
                "title": "Steve",
                "id": "uniqueID1"
            },
            {
                "title": "James",
                "id": "uniqueID#9"
            }
            ]
        }
        ]
    },
    "Level 2": {
        "Stage 1": [
        {
            "title": "Parent 4",
            "id": "Parent4#id",
            "Children": [
            {
                "title": "Tim",
                "id": "uniqueIDadsf"
            },
            {
                "title": "Hans",
                "id": "uniqueID#9asdf"
            }
            ]
        }
        ],
        "Stage 2": [
        {
            "title": "Parent 10",
            "id": "Parent10#id",
            "Children": [
            {
                "title": "Chris",
                "id": "uniqueIDadsf33"
            },
            {
                "title": "Jack",
                "id": "uniqueID#9aserdf"
            }
            ]
        }
        ]
    }
};

// based on the value 'uniqueID#9aserdf' I want to know/return its parent keys: 'Stage 2' and 'Level 2'

推荐答案

类似以下内容:

for (var prop in obj) {
  for (var prop2 in obj[prop]) {

  }
}

然后使用此方法向下迭代并检查

Then use this method to iterate down and check

这是一个完整的例子:

for (var prop in obj) {
  for (var prop2 in obj[prop]) {
    //console.log(prop2);
    for (var prop3 in obj[prop][prop2]) {
      //console.log("->"+prop3);
      for (var prop4 in obj[prop][prop2][prop3]) {
        //console.log("->"+"->"+prop4);
        for (var prop5 in obj[prop][prop2][prop3][prop4]) {
          //console.log("->"+"->"+"->"+prop5);
          for (var prop6 in obj[prop][prop2][prop3][prop4][prop5]) {
            //console.log("->"+"->"+"->"+"->"+prop6);
            if (obj[prop][prop2][prop3][prop4][prop5][prop6] == "uniqueID#9aserdf") {
              console.log("Stage :" +prop2 + " == Level :" + prop);
            }
          }
        }
      }
    }
  }
}

您可以删除代码中的注释，以帮助查看您在对象中的位置.

you can take away the comments in the code, to help see where you are in the object.

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