无法显示来自Mongo数据库的数据

我正在学习本教程： http : //cwbuecheler.com/web/tutorials/2013/node-express-mongo/

当我在我的mongoterminal执行db.usercollection.find().pretty() ，我的logging打印 – 所以我知道我有logging显示。

当我在浏览器中执行http://localhost:3000/userlist时，我在顶部看到“用户列表”字样 – 但我没有得到任何用户数据。

它应该看起来像这样 。

问题：我的userlist.jade文件中的链接是否不指向数据库数据？

userlist.jade

 extends layout block content h1. User List ul each user, i in userlist li a(href="mailto:#{user.email}")= user.username 

index.js

 var express = require('express'); var router = express.Router(); /* GET home page. */ router.get('/', function(req, res, next) { res.render('index', { title: 'Express' }); }); /* GET Userlist page. */ router.get('/userlist', function(req, res) { var db = req.db; var collection = db.get('usercollection'); collection.find({},{},function(e,docs){ res.render('userlist', { "userlist" : docs }); }); }); module.exports = router; 

app.js

 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 // we want to talk to mongodb, use monk to do it, databasebase is lcoated at localhost:27017/nodetest1 var mongo = require('mongodb'); var monk = require('monk'); var db = monk('localhost:27017/nodetest1'); 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 - new code app.use(function(req,res,next){ req.db = db; next(); }); // telling Express what route files to use 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: {} }); }); // our master app exporting its app object. All modules export an object whch can easily be called elsewhere in code. module.exports = app;