json - 如何重命名 JSON key

Question

我有一个包含以下内容的 JSON 对象:

[
  {
    "_id":"5078c3a803ff4197dc81fbfb",
    "email":"user1@gmail.com",
    "image":"some_image_url",
    "name":"Name 1"
  },
  {
    "_id":"5078c3a803ff4197dc81fbfc",
    "email":"user2@gmail.com",
    "image":"some_image_url",
    "name":"Name 2"
  }
]

我想将“_id”键更改为“id”，这样它就会变成

[
  {
    "id":"5078c3a803ff4197dc81fbfb",
    "email":"user1@gmail.com",
    "image":"some_image_url",
    "name":"Name 1"
  },
  {
    "id":"5078c3a803ff4197dc81fbfc",
    "email":"user2@gmail.com",
    "image":"some_image_url",
    "name":"Name 2"
  }
]

我将如何使用 Javascript、jQuery 或 Ruby、Rails 来做到这一点？

谢谢。

Answer 1

1. 解析 JSON

const arr = JSON.parse(json);

1. 对于 JSON 中的每个对象，重命名键:

obj.id = obj._id;
delete obj._id;

1. 将结果字符串化

大家一起:

function renameKey ( obj, oldKey, newKey ) {
  obj[newKey] = obj[oldKey];
  delete obj[oldKey];
}

const json = `
  [
    {
      "_id":"5078c3a803ff4197dc81fbfb",
      "email":"user1@gmail.com",
      "image":"some_image_url",
      "name":"Name 1"
    },
    {
      "_id":"5078c3a803ff4197dc81fbfc",
      "email":"user2@gmail.com",
      "image":"some_image_url",
      "name":"Name 2"
    }
  ]
`;
   
const arr = JSON.parse(json);
arr.forEach( obj => renameKey( obj, '_id', 'id' ) );
const updatedJson = JSON.stringify( arr );

console.log( updatedJson );