How to use body-parser in express router?

Question

I have a post api that has object but i am not able to print in console its throowing undefined i thought i am missing body-parser but after adding body parser i see error body-parser deprecated bodyParser: use individual json/urlencoded middlewares Any help will be appreciated.

routes.js

var express = require('express');
var bodyParser = require('body-parser');
var Diagram = require('./api/diagram/diagram.controller');
var router = express.Router();
router.post('/saveUpdateDiagram',bodyParser,function(req,res){
    console.log(req.body);
});

app.js

var express = require('express');
var path = require('path');
var app = express();
var bodyParser = require('body-parser');
var router = express.Router();
var route = require('./server/routes').router;
var mongoose = require('mongoose');
mongoose.connection.on('connected', function() {
    console.log('MongoDB connected ');
});


app.use(express.static(path.join(__dirname, 'public')));
app.use('/', route);
app.use(bodyParser.urlencoded({
    extended: false
}))
app.use(bodyParser.json())


app.listen(8760, function() {
    console.log('I am listening 8760...');
});

Answer 1

Your use of body-parser in app.js is fine. It is middleware, and it is loaded with app.use so that it will be applied to every incoming request.

You can remove it in routes.js, so that it looks like so:`

var express = require('express');
var Diagram = require('./api/diagram/diagram.controller');
var router = express.Router();
router.post('/saveUpdateDiagram', function(req,res){
    console.log(req.body);
});

` Also, try replacing:

app.use(bodyParser.urlencoded({
    extended: false
}))

with:

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

Answer 2

It means that using the bodyParser() constructor has been deprecated, as of 2014-06-19.

 app.use(bodyParser()); //Now deprecated You now need to call the methods separately
 app.use(bodyParser.urlencoded());

 app.use(bodyParser.json()); //And so on.

If you're still getting a warning with urlencoded you need to use

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

The extended config object key now needs to be explicitly passed, since it now has no default value, as said over here.