req.body undefined...how can i solve - node.js

Question

[ server.js ]
const fs = require("fs");
const express = require("express");
const bodyParser = require("body-parser");
const mysql = require("mysql");
const app = express();
const port = process.env.PORT || 5000;
app.use(bodyParser.urlencoded({
extended: true
}));
app.use(bodyParser.json());
const data = fs.readFileSync("./database.json");
const conf = JSON.parse(data);
const connection = mysql.createConnection({
host: conf.host,
user: conf.user,
password: conf.password,
port: conf.port,
database: conf.database
});
connection.connect();
app.get("/api/users", (req, res) => {
connection.query(
"select * from users where isDeleted = 0",
(err, rows, fields) => {
res.send(rows);
// console.log(err);
// console.log(rows);
}
);
});
app.post("/api/users", (req, res) => {
let sql = "insert into users values (null,?,?,now(),now(),0)";
let name = req.body.name;
let dsc = req.body.dsc;
let params = [name, dsc];
console.log(params);
connection.query(sql, params,
(err, rows, fields) => {
res.send(rows);
// console.log(err);
// console.log(rows);
});
});
app.delete("/api/users/:id", (req, res) => {
let sql = "update users set isDeleted = 1 where id = ?";
let params =[req.params.id];
connection.query(sql,params,
(err, rows, fields)=>{
res.send(rows);
// console.log(err);
// console.log(rows);
});
});
app.listen(port, () => console.log(`Listening on port http://localhost:${port}`));
Describe the bug
I am trying to send form data to my API but req.body is undefined for some reason.
To Reproduce
Steps to reproduce the behavior:
create a new request
enter your API endpoint URL
select the body tab and then select the form-data tab
enter the key name of the form data you are trying to send so your API can recognize it and then the value.
Click send and you should get a response with a status code of 200. If you get an error like me telling me that req.body is undefined then you have the same problem as me.

Answer 1

You are using bodyparser.json(). From the documentation, this will parse requests that are only in JSON. You are better off using bodyParser.urlencoded([options]).
I advise using express.urlencoded instead.
Read this for clarification

Answer 2

you are missing the router
[ server.js ]
const fs = require("fs");
const express = require("express");
const bodyParser = require("body-parser");
const mysql = require("mysql");
const app = express();
const port = process.env.PORT || 5000;
app.use(bodyParser.urlencoded({
extended: true
}));
app.use(bodyParser.json());
const data = fs.readFileSync("./database.json");
const conf = JSON.parse(data);
const connection = mysql.createConnection({
host: conf.host,
user: conf.user,
password: conf.password,
port: conf.port,
database: conf.database
});
connection.connect();
// u need a router
const router = express.Router();
router.get("/api/users", (req, res) => {
connection.query(
"select * from users where isDeleted = 0",
(err, rows, fields) => {
res.send(rows);
// console.log(err);
// console.log(rows);
}
);
});
router.post("/api/users", (req, res) => {
let sql = "insert into users values (null,?,?,now(),now(),0)";
let name = req.body.name;
let dsc = req.body.dsc;
let params = [name, dsc];
console.log(params);
connection.query(sql, params,
(err, rows, fields) => {
res.send(rows);
// console.log(err);
// console.log(rows);
});
});
router.delete("/api/users/:id", (req, res) => {
let sql = "update users set isDeleted = 1 where id = ?";
let params =[req.params.id];
connection.query(sql,params,
(err, rows, fields)=>{
res.send(rows);
// console.log(err);
// console.log(rows);
});
});
app.use(router);
app.listen(port, () => console.log(`Listening on port http://localhost:${port}`));