类型错误:Router.use() 需要中间件功能但得到了一个对象 [英] TypeError: Router.use() requires middleware function but got a Object
问题描述
新版本的 express 对中间件进行了一些更改,并且我对有关此问题的其他一些帖子的代码进行了一些更改,但我无法坚持下去.
There have been some middleware changes on the new version of express and I have made some changes in my code around some of the other posts on this issue but I can't get anything to stick.
我们事先就让它工作了,但我不记得有什么变化.
We had it working before hand but I can't remember what the change was.
throw new TypeError('Router.use() requires middleware function but got a
^
TypeError: Router.use() requires middleware function but got a Object
<小时>
node ./bin/www
js-bson: Failed to load c++ bson extension, using pure JS version
js-bson: Failed to load c++ bson extension, using pure JS version
<小时>
/Users/datis/Documents/bb-dashboard/node_modules/express/lib/router/index.js:438
throw new TypeError('Router.use() requires middleware function but got a
^
TypeError: Router.use() requires middleware function but got a Object
at /Users/datis/Documents/bb-dashboard/node_modules/express/lib/router/index.js:438:13
at Array.forEach (native)
at Function.use (/Users/datis/Documents/bb-dashboard/node_modules/express/lib/router/index.js:436:13)
at /Users/datis/Documents/bb-dashboard/node_modules/express/lib/application.js:188:21
at Array.forEach (native)
at Function.use (/Users/datis/Documents/bb-dashboard/node_modules/express/lib/application.js:185:7)
at Object.<anonymous> (/Users/datis/Documents/bb-dashboard/app.js:46:5)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
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');
var mongoose = require('mongoose');
var session = require('express-session');
var MongoClient = require('mongodb').MongoClient;
var routes = require('./routes/index');
var users = require('./routes/users');
var Users = require('./models/user');
var Items = require('./models/item');
var Store = require('./models/store');
var StoreItem = require('./models/storeitem');
var app = express();
//set mongo db connection
var db = mongoose.connection;
MongoClient.connect("mongodb://localhost:27017/test", function(err, db) {
if(!err) {
console.log("We are connected");
}
});
// var MONGOHQ_URL="mongodb://localhost:27017/test"
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
// uncomment after placing your favicon in /public
//app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(session({
secret: 'something',
resave: true,
saveUninitialized: true
}));
app.use('/', routes);
app.use('/users', users);
app.use(express.static(path.join(__dirname, 'public')));
// catch 404 and forward to error handler
// app.use(function(req, res, next) {
// var err = new Error('Not Found');
// err.status = 404;
// next(err);
// });
// Make our db accessible to our router
app.use(function(req, res, next){
req.db = db;
next();
});
// 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;
<小时>
由于版本控制的原因,这个问题的答案似乎发生了变化.感谢 尼克
推荐答案
如果你使用的是express 2.x以上
,你必须像下面这样声明app.router
代码.请尝试替换您的代码
If your are using express above 2.x
, you have to declare app.router
like below code. Please try to replace your code
app.use('/', routes);
与
app.use(app.router);
routes.initialize(app);
请点击此处以获取有关应用的更多详细信息.路由器
Please click here to get more details about app.router
app.router
在 express 3.0+
中折旧.如果您使用的是 express 3.0+,请参阅下面的Anirudh 的回答.
app.router
is depreciated in express 3.0+
. If you are using express 3.0+, refer to Anirudh's answer below.
这篇关于类型错误:Router.use() 需要中间件功能但得到了一个对象的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!