将对象传递给护照的 require() 时出现类型错误

Question

我收到类型错误：对象不是函数

当我运行:

节点server.js

对于下面这行代码

require('./app/routes.js')(app, passport);

来自我的 server.js 文件的以下代码：

// server.js

// set up ======================================================================
// get all the tools we need
var express = require('express');
var app = express();
var port = process.env.PORT || 8080;
var mongoose = require('mongoose');
var passport = require('passport');
var flash = require('connect-flash');

var morgan = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var session = require('express-session');

var configDB = require('./config/database.js');

// configuration ================================================================
mongoose.connect(configDB.url); // connect to our database

// require('./config/passport')(passport); // pass passport for configuration


// set up our express application
app.use(morgan('dev')); // log every request to the console
app.use(cookieParser()); // read cookies (needed for auth)
app.use(bodyParser.json()); // get info from html forms
    app.use(bodyParser.urlencoded({ extended: true}));

app.set('view engine', 'ejs'); // set up ejs for templating

// requirements for passport:
app.use(session({ secret: 'ilovescotchscotchyscotchscotch'}));
app.use(passport.initialize());
app.use(passport.session()); // persistent login sessions
app.use(flash()); // use connect-flash for flash messages stored in session

// routes ========================================================================
require('./app/routes.js')(app, passport); // load our routes and pass in our app and fully configured passport

// launch =======================================================================
app.listen(port);
console.log('The magic happens on port ' + port);

不完全确定为什么会这样...

顺便说一句，我正在学习本教程：https://scotch.io/tutorials/easy-node-authentication-setup-and-local

谢谢！

Answer 1

根据您的评论：post 很好地解释了 require 在 nodeJS 中的工作原理（这不是 Javascript 的事情）。基本上每个可能需要的文件通常都期望导出需要文件可以分配给变量的东西（例如 var someVar = require('someFile');）。如果导出的值是一个函数，那么您可以在分配给该变量之前立即调用它（例如 var someVar = require('someFile')(params);）。对于您的错误，文件 ./app/routes.js 似乎没有导出函数。

文件：./app/routes.js

// some code that does cool stuff
// ...
// Time to expose whatever we want to the requiring file
module.exports = someObject; // Or value, function, etc.

文件：main.js

// we want cool stuff from routes.js
var coolStuff = require('./app/routes.js');

// someObject from ./app/routes.js is now assigned to coolStuff
coolStuff(); // ERROR: object is not a function

console.log(typeof coolStuff) // "object"

将对象传递给护照的 require() 时出现类型错误

typeError when passing in objects to require() for passport

javascript

node.js

express

typeerror