Unable to post json data using postman in nodejs server - node.js

Question

What am I doing wrong here? I saw somewhere that body-parser is now inbuilt in express in express, I tried that also still the same result.
app.js
const express = require("express");
const app = express();
const mongoose = require("mongoose");
require("dotenv/config");
const posts = require("./routes/posts");
const bodyParser = require("body-parser");
//middleware to use "/posts" whenever we go to posts
app.use("/posts", posts);
app.use(bodyParser.json()); //parsing json
//routes
app.get("/", (req, res) => {
//handle root
res.send("We are home");
});
//how do we start listening/connect to the server
mongoose.connect(
process.env.DB_CONNECTION,
{ useNewUrlParser: true, useUnifiedTopology: true },
() => console.log("connected to DB!")
);
app.listen(3000);
Post.js
const mongoose = require("mongoose");
const PostSchema = mongoose.Schema({
title: {
type: String,
required: true,
},
description: {
type: String,
required: true,
},
date: {
type: Date,
default: Date.now(),
},
});
module.exports = mongoose.model("Posts", PostSchema);
posts.js
const express = require("express");
let router = express.Router();
const Post = require("../models/Post");
//middleware
/*router.use(function(req, res, next){
console.log(req.url, "#", Date.now());
next();
})*/
router
.route("/")
.get((req, res, next) => {
res.send("hi get /posts");
})
.post((req, res, next) => {
console.log(req.body);
});
module.exports = router;
Terminal always shows that its undefined.
here's a screenshot of postman:

Answer 1

Yes bodyParser is included in the current versions of expressjs, and you can apply it like this:
app.use(express.json());
Also this middleware must be applied before using routes. So the order must be like this:
app.use(express.json()); //parsing json
app.use("/posts", posts);