如何使用javascript在json中用子值替换或更新键？

Question

Actual Code:

{
    "workbookInformation": {
        "version": "9.1",
        "source-platform": "win"
    },
    "datasources": {
        "filename": "data",
        "caption": "Title",
        "version": "qqq.1",
        "cleaning": "no",
        "inline": "true",
        "validate": "no",
        "class": "excel-direct",
        "interpretationMode": "0"
    }
}

Output I need :

{
    "workbookInformation": {
        "version": "9.1",
        "source-platform": "win"
    },
    "Title": {
        "filename": "data",
        "caption": "Title",
        "version": "qqq.1",
        "cleaning": "no",
        "inline": "true",
        "validate": "no",
        "class": "excel-direct",
        "interpretationMode": "0"
    }
}

caption key value ie. Title needs to be replaced with datasources .

Answer 1

You can define a new property directly on an object with Object.defineProperty() and pass descriptor for the property being defined to this method with the result of Object.getOwnPropertyDescriptor() :

 var obj = {"workbookInformation": {"version": "9.1","source-platform": "win"},"datasources": {"filename": "data","caption": "Title","version": "qqq.1","cleaning": "no","inline": "true","validate": "no","class": "excel-direct","interpretationMode": "0"}}; Object.defineProperty(obj, 'Title', Object.getOwnPropertyDescriptor(obj, 'datasources')); delete obj.datasources; console.log(obj);

 .as-console-wrapper { max-height: 100% !important; top: 0; }

Answer 2

Based on your example, you can simply add a new item on the root JSON with the key "Title" and then remove the one with the key "datasources".

Assuming json_obj as your json object:

json_obj[json_obj.datasources.caption] = json_obj.datasources;
delete(json_obj.datasources);

Answer 3

Parse the JSON string into a Javascript object so that you can modify it with ease.

jsObj = JSON.parse(jsonData);

Below I'm creating a new object with the desired keys and finally serialize it again.

jsonData = JSON.stringify({
  workbookInformation: jsObj.workbookInformation,
  Title: jsObj.datasources,
});