saving data to mongodb using nodejs - node.js

Question

I am self learning nodeJS, Now I tried to insert data in MongoDB and this my goal
insert values in here and once submit button is clicked, should save the data successfully to mongodb and this should return a successful message.
But this is the error
TypeError: Cannot read property 'location' of undefined
Here are the code snippets
const express = require('express');
const dotenv = require("dotenv").config();
const address = process.argv[2];
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const app = express();
//INSERT TO MONGO DB
//connect to mongo db
mongoose.connect('mongodb://localhost/weathertest2');
mongoose.Promise = global.Promise;
//create weather schema
const WeatherSchema = new Schema({
location:{
type: String
},
temperature:{
type: String
},
observationTime:{
type: String
}
});
const Weather = mongoose.model('weather', WeatherSchema);
// post request
app.post('/new', function(req, res){
new Weather({
location : req.body.location,
temperature: req.body.temperature,
observationTime : req.body.observationTime
}).save(function(err, doc){
if(err) res.json(err);
else res.send('Successfully inserted!');
});
});
// listen for request
app.listen(process.env.port || 9000, function(){
console.log('now listening for testing request');
});
app.use(express.static('public'));

Answer 1

Try using the body-parser middleware alongside with express:
https://www.npmjs.com/package/body-parser
const bodyParser = require("body-parser");
/*
* Parses the text as URL encoded data (which is how browsers tend to send
* form data from regular forms set to POST) and
* exposes the resulting object (containing the keys and values) on req.body
*/
app.use(bodyParser.urlencoded({ extended: true }));
This way the data from the form should be included in the request body (req.body.location)

Answer 2

It seems that the body of the request is undefined. This might be because express isn't parsing the request body correctly. The solution is probably to use a body parser.
npm install --save body-parser
Then import body-parser into your file:
const bodyParser = require('body-parser')
Then place this line before the "/new" handler:
app.use(bodyParser)