如何访问 req.body 的特定部分（Node JS）

Question

I have been trying to specific access a nested property of req.body the output however is always undefined the code is as follows

  let dataRecieved = JSON.stringify(req.body);
        console.log(dataRecieved);
        let refCode = dataRecieved["refferal"];

and the output in the terminal is

{"name":"","phone":"","emailid":"","refferal":"gg","time":"Sat Oct 05 2019 08:14:07 GMT+0530 (India Standard Time)"}
undefined

the second undefined is when i ask for the refferal object of req.body

Answer 1

First mistake you made is converting the JSON object into a string. One way you can access data inside a JSON object using. operator. Therefore try below code snippet to access data inside the object.

let dataRecieved = req.body;
console.log(dataRecieved.name);

Considering the best practices either you can lodash (https://lodash.com/ ) or object destructuring (ES6 destructuring) based on the scenario.

Answer 2

make sure body-parser middleware is installed

const app = require('express')()
const bodyParser = require('body-parser')

app.use(bodyParser.json())
app.use(bodyParser.urlencoded({ extended: true }))

after that you can access req.body directly as a object

app.post('*' (res, req) => {
  let dataRecieved  = req.body
})