如何用express设置mongodb？

Question

New to Express App , I am trying to setup mongodb using express and node.js. I have some issues if i can get some help in this area. i tried to add directories refrences so you can have idea.

1- var config is coming undefined not sure path is correct.

2- getting SyntaxError: Unexpected reserved word for require('./config/express')(app); .

Basically trying to have app running with local mongodb.

server > app.js

var express = require('express');
var mongoose = require('mongoose');
mongoose.Promise = require('bluebird');
var config = require('./config/environment');
var http = require('http');
var https = require('https');
var fs = require('fs');
var bodyParser = require('body-parser');
// Connect to MongoDB
mongoose.connect(config.mongo.uri, config.mongo.options);
mongoose.connection.on('error', function(err) {
    console.error('MongoDB connection error: ' + err);
    process.exit(-1);
});


// Setup server
var app = express();
var server = http.createServer(app);


require('./config/express')(app);
require('./routes')(app);

// Start server
function startServer() {
    server.listen(config.port, config.ip, function() {
        console.log('Express server listening on %d, in %s mode', config.port, app.get('env'));
    });
}

setImmediate(startServer);

// Expose app
exports = module.exports = app;

server > config > express.js

var express = require('express');
var morgan = require('morgan');
var bodyParser = require('body-parser');
var path = require('path');
var config = require('./config/environment');
var session = require('express-session');
var connectMongo = require('connect-mongo');
var mongoose = require('mongoose');
var mongoStore = connectMongo(session);

export default function(app) {
    var env = app.get('env');

    app.set('views', config.root + '/server/views');
    app.engine('html', require('ejs').renderFile);
    app.set('view engine', 'html');
    /*app.use(compression());*/
    app.use(bodyParser.urlencoded({
        extended: false
    }));

    app.set('appPath', path.join(config.root, 'client'));

    if ('development' === env || 'test' === env) {
        app.use(express.static(path.join(config.root, '.tmp')));
        app.use(express.static(app.get('appPath')));
        app.use(morgan('dev'));

server > config > environment > development.js

module.exports = {

  // MongoDB connection options
  mongo: {
    uri: 'mongodb://localhost/test-modeler-dev'
  },

  // Seed database on startup
  seedDB: false

};

Answer 1

As it was pointed out in the comments of the question, your problem is that you are using newer JavaScript features with an older version of Node. To get around the current error, you should change this line in server > config > express.js :

// ...
export default function(app) {
// ...

To

// ...
module.exports = function(app) {
// ...

This should solve this particular problem. But if the code you are using is using other features of ECMAScript 2015 that aren't supported by your version of Node, then you have two options:

• Update to the latest version of Node.js here.
• Refactor all of your code remove all ECMAScript 2015 features to ensure that it works with your version of Node.js.

Hope this helps.