Node with mongodb not starting application

Question

I’m trying to raise an application in Node with mongoose, (I am studying, MEAN book code house) and generates me the following error while trying to start the file server.js where I start my application on Node, see below.

Below is my server.js file.

var http = require('http');

var app = require('./config/express')();

require('./config/database.js')('mongodb://localhost/contatooh');

http.createServer(app).listen(app.get('port'),function(){
	console.log('Express server executando na porta ' + app.get('port'));
});

NOTE: the file path bson.node is correct, and the file is existing in the folder.

Below is the connection file with the bank Mongodb.

var mongoose = require('mongoose');

module.exports = function(uri){
    mongoose.connect(uri);

    mongoose.connection.on('connected', function(){
        console.log('Mongoose ! conectado em '+uri);
    });

    mongoose.connection.on('disconnected', function(){
        console.log('Mongoose ! Desconectado de '+uri);
    });

    mongoose.connection.on('error', function(erro){
        console.log('Mongoose ! erro na conecxão  '+erro);
    });

    process.on('SIGINT', function(){
        mongoose.connection.close(function(){
            console.log('Mongoose ! Desconectado pelo término da aplicação');
            process.exit(0);
        });
    });
}

Answer 1

Man, I got some suspicions:

1º - try to run this project from another folder: it can be something related to windows permissions or some firewall that is blocking the process...

2º - The version of Node - I went around in a linux environment in the cloud (AWS-Cloud9) your project, I used Node V6.11.2 - but had to change line 4 in the database.js:

    mongoose.connect(uri, { useNewUrlParser: true });

I hope it gives you a light.

Answer 2

To avoid future deprecation errors, the most recent correction is this:

const mongoose = require('mongoose')

mongoose.connect('mongodb://localhost:27017/your_database', 
    { useNewUrlParser: true, useUnifiedTopology: true }).
    catch(error => handleError(error));

mongoose.set('useCreateIndex', true)
mongoose.set('useFindAndModify', false)

mongoose.connection.on('error', err => {
    logError(err);
});

mongoose.Promise = global.Promise

module.exports = mongoose

Works on version 5.7.1 of Mongoose. Source: Mongoose