节点JS忽略分拆中间件

Question

我有一些问题与中间件不再与Node.js的 budnled我做就像这里：

Node js Error: Most middleware (like session) is no longer bundled with Express and must be installed separately

，但我仍然得到了同样的错误：“大多数中间件唧唧歪歪......”

var express = require('express'); 
var mongoose = require('mongoose'); 
var path = require('path'); 
var bodyParser = require('body-parser'); 
var config = require('config'); 
var session = require('express-session'); 

var app = express(); 
var IS_DEV = (app.get('env') === 'development'); 
var MongoStore = require('connect-mongo')(express); 

app.use(session({ 
    secret: config.get('session:secret'), 
    key: config.get('session:key'), 
    cookie: config.get('session:cookie'), 
    store: new MongoStore({mongoose_connection: mongoose.connection}) 
})); 

包安装，我看到它在node_modules文件夹中。而且我没有看到像这样的错误：session is undefined我做错了什么？

顺便说一句相同事情与express-error-handler包

• 视窗8.1
• 节点4.4.0
• mongodb的3.2.4
• NPM 20年2月14日
• 表达4.13.4

回应：

Error: Most middleware (like session) is no longer bundled with Express and must be installed separately. Please see https://github.com/senchalabs/connect#middleware. 
[1]  at Function.Object.defineProperty.get (C:\Work\todoapp\node_modules\express\lib\express.js:99:13) 
[1]  at connectMongo (C:\Work\todoapp\node_modules\connect- mongo\src\index.js:48:43) 
[1]  at Object.<anonymous> (C:\Work\todoapp\app.js:10:42) 
[1]  at Module._compile (module.js:409:26) 
[1]  at Object.Module._extensions..js (module.js:416:10) 
[1]  at Module.load (module.js:343:32) 
[1]  at Function.Module._load (module.js:300:12) 
[1]  at Module.require (module.js:353:17) 
[1]  at require (internal/module.js:12:17) 
[1]  at Object.<anonymous> (C:\Work\todoapp\bin\www:7:11) 
[1]  at Module._compile (module.js:409:26) 
[1]  at Object.Module._extensions..js (module.js:416:10) 
[1]  at Module.load (module.js:343:32) 
[1]  at Function.Module._load (module.js:300:12) 
[1]  at Function.Module.runMain (module.js:441:10) 
[1]  at startup (node.js:139:18) 
[1]  at node.js:968:3 
[1] Program node --debug ./bin/www exited with code 1 
[1] 

Answer 1

由于您使用的是Express 4，所以connect-mongo的设置不正确。

它应该是：

var session = require('express-session'); 
... 
var MongoStore = require('connect-mongo')(session); 
              ^^^^^^^ not `express` 

见the documentation。