[英]Can't display data from Mongo database
我正在關注此教程: http : //cwbuecheler.com/web/tutorials/2013/node-express-mongo/
當我在mongo終端中執行db.usercollection.find().pretty()
時,我的記錄會打印-因此我知道我有要顯示的記錄。
當我在瀏覽器中執行http://localhost:3000/userlist
時,在頂部顯示“用戶列表”一詞-但沒有任何用戶數據。
它應該看起來像這樣 。
問:我的userlist.jade文件中的鏈接是否未指向數據庫數據?
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;
我遇到了同樣的錯誤,然后解決了這個問題:
app.js
var db = monk('localhost:27017 / nodetest1');
將本地主機更改為127.0.0.1
並確保集合名稱為nodetest1
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