TypeError: Cannot read property 'body' of undefined after POST (MEAN)

Question

I am trying to send POST data from AngularJS to Express. What I am doing at the moment is trying to send some POST stuff via curl.

I already tried sending the data. It gets send, I get 200 as a response. But whenever I try to access the data via body-parser through req.body I will get a 500 and the error that I posted at the very bottom.

I did a lot of research on that matter (past 4-5 hours...) and I think I checked the following common issues:

• I use some sort of request parser: body-parser
• I put my app.use(...) with body-parser middleware before requiring for routes
• I explicitly tell what Content-Type the POST uses
• I tried both application/json and application/x-www-form-urlencoded

I surrender. StackOverflowers. Help me, please.

curl:

curl -X POST -H "Content-Type: application/json" -d '{"username": "gala", "email": "[email protected]", "password": "123"}' localhost:3000/users

express.js

// glowny plik przygotowujacy aplikacje express

// wczytanie zaleznosci
var express = require('express')
var stylus = require('stylus')
var parser = require('body-parser')
var morgan = require('morgan')
var compress = require('compression')
var methodOverride = require('method-override')

// przygotowanie aplikacji, obsluga middleware i na koncu zwrocenie obiektu aplikacji
module.exports = function() {
    var app = express()

    if (process.env.NODE_ENV === 'development') {
        app.use(morgan('dev'))
    } else if (process.env.NODE_ENV === 'production') {
        app.use(compress())
    }

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

    app.use(methodOverride())

    // uzycie jade jako silnika szablonow dla html
    app.set('views', __dirroot + '/app/views')
    app.set('view engine', 'jade')

    require(__dirroot + '/app/routes/index.server.route.js')(app)
    require(__dirroot + '/app/routes/users.server.route.js')(app)

    // mozliwosci uzywania statycznych plikow z folderu /public
    app.use(express.static(__dirroot + '/public'))

    return app
}

users.server.route.js:

var users = require(__dirroot + '/app/controllers/users.server.controller.js')

module.exports = function(app) {
    app.route('/users').post(function() {
        users.create()
    })
}

users.server.controller.js:

var User = require('mongoose').model('User')

exports.create = function(req, res, next) {
    console.log(req.body)
}

Error message:

TypeError: Cannot read property 'body' of undefined
   at Object.exports.create (/home/gala/Projekty/cantr-crafting/app/controllers/users.server.controller.js:4:20)
   at /home/gala/Projekty/cantr-crafting/app/routes/users.server.route.js:5:15
   at Layer.handle [as handle_request] (/home/gala/Projekty/cantr-crafting/node_modules/express/lib/router/layer.js:82:5)
   at next (/home/gala/Projekty/cantr-crafting/node_modules/express/lib/router/route.js:110:13)
   at Route.dispatch (/home/gala/Projekty/cantr-crafting/node_modules/express/lib/router/route.js:91:3)
   at Layer.handle [as handle_request] (/home/gala/Projekty/cantr-crafting/node_modules/express/lib/router/layer.js:82:5)
   at /home/gala/Projekty/cantr-crafting/node_modules/express/lib/router/index.js:267:22
   at Function.proto.process_params (/home/gala/Projekty/cantr-crafting/node_modules/express/lib/router/index.js:321:12)
   at next (/home/gala/Projekty/cantr-crafting/node_modules/express/lib/router/index.js:261:10)
   at methodOverride (/home/gala/Projekty/cantr-crafting/node_modules/method-override/index.js:77:5) 

Answer 1

I don't use Node or Express much but shouldn't you at least pass req into users.create() from the route handler, ie

app.route('/users').post(function(req, res) {
    users.create(req, res)
})

or maybe even

app.route('/users').post(users.create);

Answer 2

TypeError: Cannot read property 'body' of undefined after POST (MEAN) you will get this error when your localhost ip is changed or the requesting ip is not correct as you mentioned in the post url. I got the same error when I troubleshoot my ethernet. Then my Ip address was changed. So check your ip. It will work..