想要将嵌套对象转换为查询参数以附加到 url

Question

我需要使用查询参数构造 url 请求，我有一个带有键和值的嵌套对象，如下所示 "user": {    "first_name": "Srini",    "last_name": "Raman",     "gender": "male",     "dob": "1992-08-02",     "address_attributes": {      "city": "San Diego",      "state": "CA",      "zip": 92127,      "country": "USA",      "latitude": 37.257009,      "longitude": -120.050767    }}我需要获得一个查询参数，如user[first_name]=Srini&user[last_name]=Raman&user[address_attributes][city]=San Diego&user[address_attributes][state]=CA

Answer 1

let obj = {

  user: {

    first_name: 'Srini',

    last_name: 'Raman',

    gender: 'male',

    dob: '1992-08-02',

    address_attributes: {

      city: 'San Diego',

      state: 'CA',

      zip: 92127,

      country: 'USA',

      latitude: 37.257009,

      longitude: -120.050767

    }

  }

};

let getPairs = (obj, keys = []) =>

  Object.entries(obj).reduce((pairs, [key, value]) => {

    if (typeof value === 'object')

      pairs.push(...getPairs(value, [...keys, key]));

    else

      pairs.push([[...keys, key], value]);

    return pairs;

  }, []);

let x = getPairs(obj)

  .map(([[key0, ...keysRest], value]) =>

    `${key0}${keysRest.map(a => `[${a}]`).join('')}=${value}`)

  .join('&');

console.log(x);