node.js Error: Not Found
node.js Error: Not Found
我是 node.js
初学者。
我正在尝试制作一个页面供用户将数据输入 MongoDB
。
我按照在线教程进行操作,但弹出了以下错误。
已经仔细检查过我的代码完全相同。
我还需要安装其他东西吗?
错误:未找到
at /.../testproject/app.js:44:13
at Layer.handle [as handle_request] (/.../testproject/node_modules/express/lib/router/layer.js:82:5)
at trim_prefix (/.../testproject/node_modules/express/lib/router/index.js:302:13)
at /.../testproject/node_modules/express/lib/router/index.js:270:7
at Function.proto.process_params (/.../testproject/node_modules/express/lib/router/index.js:321:12)
at next (/.../testproject/node_modules/express/lib/router/index.js:261:10)
at /.../testproject/node_modules/express/lib/router/index.js:603:15
at next (/.../testproject/node_modules/express/lib/router/index.js:246:14)
at Function.proto.handle (/.../testproject/node_modules/express/lib/router/index.js:166:3)
at router (/.../testproject/node_modules/express/lib/router/index.js:35:12)
这是我的 index.js
var express = require('express');
var router = express.Router();
router.get('/', function(req, res, next) {
res.render('index', { title: 'New Title' });
});
router.get('/userlist', function(req, res) {
var db = req.db;
var collection = db.get('usercollection');
collection.find({},{},function(e,docs){
var name = [];
var objKey = Object.keys(docs);
objKey.forEach(function(objectid){
var itemkeys = Object.keys(docs[objectid]);
itemkeys.forEach(function(itemkey) {
var itemvalue =docs[objectid][itemkey];
console.log(objectid+': '+itemkey+' = '+itemvalue);
if (itemkey == "username") {
name.push(itemvalue);
}
})
})
console.log(name);
res.render('userlist', {
"userlist" : name
});
});
});
/* POST to Add User Service */
router.post('/adduser', function(req, res) {
// Set our internal DB variable
var db = req.db;
// Get our form values. These rely on the "name" attributes
var userName = req.body.username;
var Email = req.body.email;
// Set our collection
var collection = db.get('usercollection');
// Submit to the DB
collection.insert({
"username" : userName,
"email" : Email
}, function (err, doc) {
if (err) {
// If it failed, return error
res.send("There was a problem adding the information to the database.");
}
else {
// If it worked, set the header so the address bar doesn't still say /adduser
res.location("userlist");
// And forward to success page
res.redirect("userlist");
}
});
});
/* GET home page. */
router.get('/newuser', function(req, res) {
res.render('newuser', { title: 'Add New User' });
});
module.exports = router;
这里来自 第 44 行 来自 app.js
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
http://cwbuecheler.com/web/tutorials/2013/node-express-mongo/
向前搜索到显示 "Go ahead and submit. Enjoy the 404 error. We're about to fix that."
的位置
您刚刚看到教程作者说您会看到的 404 错误。按照教程进行操作,您可能会在路由器中添加必要的 POST 代码。
正如我上面所说,您想访问 /newuser 页面以输入新用户。
我是 node.js
初学者。
我正在尝试制作一个页面供用户将数据输入 MongoDB
。
我按照在线教程进行操作,但弹出了以下错误。
已经仔细检查过我的代码完全相同。
我还需要安装其他东西吗?
错误:未找到
at /.../testproject/app.js:44:13
at Layer.handle [as handle_request] (/.../testproject/node_modules/express/lib/router/layer.js:82:5)
at trim_prefix (/.../testproject/node_modules/express/lib/router/index.js:302:13)
at /.../testproject/node_modules/express/lib/router/index.js:270:7
at Function.proto.process_params (/.../testproject/node_modules/express/lib/router/index.js:321:12)
at next (/.../testproject/node_modules/express/lib/router/index.js:261:10)
at /.../testproject/node_modules/express/lib/router/index.js:603:15
at next (/.../testproject/node_modules/express/lib/router/index.js:246:14)
at Function.proto.handle (/.../testproject/node_modules/express/lib/router/index.js:166:3)
at router (/.../testproject/node_modules/express/lib/router/index.js:35:12)
这是我的 index.js
var express = require('express');
var router = express.Router();
router.get('/', function(req, res, next) {
res.render('index', { title: 'New Title' });
});
router.get('/userlist', function(req, res) {
var db = req.db;
var collection = db.get('usercollection');
collection.find({},{},function(e,docs){
var name = [];
var objKey = Object.keys(docs);
objKey.forEach(function(objectid){
var itemkeys = Object.keys(docs[objectid]);
itemkeys.forEach(function(itemkey) {
var itemvalue =docs[objectid][itemkey];
console.log(objectid+': '+itemkey+' = '+itemvalue);
if (itemkey == "username") {
name.push(itemvalue);
}
})
})
console.log(name);
res.render('userlist', {
"userlist" : name
});
});
});
/* POST to Add User Service */
router.post('/adduser', function(req, res) {
// Set our internal DB variable
var db = req.db;
// Get our form values. These rely on the "name" attributes
var userName = req.body.username;
var Email = req.body.email;
// Set our collection
var collection = db.get('usercollection');
// Submit to the DB
collection.insert({
"username" : userName,
"email" : Email
}, function (err, doc) {
if (err) {
// If it failed, return error
res.send("There was a problem adding the information to the database.");
}
else {
// If it worked, set the header so the address bar doesn't still say /adduser
res.location("userlist");
// And forward to success page
res.redirect("userlist");
}
});
});
/* GET home page. */
router.get('/newuser', function(req, res) {
res.render('newuser', { title: 'Add New User' });
});
module.exports = router;
这里来自 第 44 行 来自 app.js
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
http://cwbuecheler.com/web/tutorials/2013/node-express-mongo/ 向前搜索到显示 "Go ahead and submit. Enjoy the 404 error. We're about to fix that."
的位置您刚刚看到教程作者说您会看到的 404 错误。按照教程进行操作,您可能会在路由器中添加必要的 POST 代码。
正如我上面所说,您想访问 /newuser 页面以输入新用户。