Question

我是NodeJS和ExpressJS的新手。我正在按照本教程http://cwbuecheler.com/web/tutorials/2013/node-express-mongo/来创建和连接mongodb和nodejs。一切都很完美（通过命令行插入数据库数据，package.json配置）除了数据库连接，它会抛出undefined error。

var monk = require('monk');
var db = monk('localhost:27017/deno');

我在控制台中检查此内容console.log(db) 'undefined'中显示index.js

我的app.js是：

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

// New Code
var mongo = require('mongodb');
var monk = require('monk');
var db = monk('localhost:27017/Fujitsu');

var routes = require('./routes/index');
var users = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

// Make our db accessible to our router
app.use(function(req,res,next){
    req.db = db;
    next();
});


app.use('/', routes);
app.use('/users', users);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
      message: err.message,
      error: err
    });
  });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
  res.status(err.status || 500);
  res.render('error', {
    message: err.message,
    error: {}
  });
});


module.exports = app;

routes / index.js是

var express = require('express');
var router = express.Router();

/* GET home page. */
router.get('/', function(req, res, next) {
  res.render('index', { title: 'Express' });
});

/************ Customized starts Here **********/

/* GET Userlist page. */

router.get('/userlist', function(req, res) {

    var db = req.db; 
    console.log(db);
    var collection = db.get('usercollection');
    collection.find({},{},function(e,docs){
        res.render('userlist', {
            "userlist" : docs
        });
    });
});



/******** Customized - Ends here ***********/

module.exports = router;

请你们中的任何人告诉我解决方案，因为现在我正在努力解决这个问题。

提前致谢。

NodeJS - 连接时Mongodb的属性不起作用

0 个答案: