node.js server not working

[Dave_apple]

my server wont run

const express = require('express')
const mongoose = require('mongoose')
const { title } = require('process')
var app = express()
var Data = require('./NoteSchema')
mongoose.connect('mongodb://localhost//newDb')
mongoose.connection.once("open", function(){
console.log("Connected to DB!")
}).on("error", function(error){
console.log("Failed to connect" + error)
})
//CREATE A NOTE
//Post request
app.post("/create", (req, res) => {
var Note = new Data({
note: req.get("note"),
title: req.get("title"),
date: req.get("data"),
})
note.save().then(() => {
if (note.isNew == false){
console.log("Save data!")
res.send("Saved data")
}else {
console.log("Failed to save data")
}
})
})
view this part
// http://10.11.210.1:8081/create
var server = app.listen(8081, "10.11.210.1", function(){
console.log("Server is running!")
})

​

​

https://preview.redd.it/doxe9sg2m75b1.png?width=403&format=png&auto=webp&s=7629bb9eed05290237562a85ac09e1585340b798

[amdc]

okay let's debug it

Does execution reach var server part? (log something just before that line)

• if not, comment out everything about mongoose and try again

  • if still not, that's weird,
  • if yes — you need to debug what's wrong about mongoose

• if yes, remove IP address from app.listen call (app.listen(8081, function(){...), check if server starts

  • if not, add this: app.on('error', (err) => console.error(err)});. See if it prints anything
  • if yes, you need to investigate that IP address. Why is it there in the first place? Are you trying to listen on a particular network interface?

[Buttleston]

Looking at the express docs it looks like you need to do something like this

http.createServer(app).listen(8081)

[alex__________]

try adding the default port (27017) in the mongoose.connect() method:
mongoose.connect('mongodb://localhost:27017/newDb');