TypeError：无法读取undefined（Node.js）的属性'get'

我在Node.js中是新的，我需要帮助。 我想在Visual Studio中使用express （^ 4.14.1） ，path （^ 0.12.7）和vash （^ 0.12.2）模块开发一个简单的程序。 我刚刚创build了几个文件，我将在下面向您展示。 homeController.js和index.js文件在控制器文件夹内。

的package.json

{ "name": "the-board5", "version": "0.0.0", "description": "TheBoard5", "main": "server.js", "author": { "name": "Utku" }, "dependencies": { "express": "^4.14.1", "path": "^0.12.7", "vash": "^0.12.2" } } 

server.js

 var http = require("http"); var express = require("express"); var app = express(); var controllers = require("./controllers"); var port = process.env.port || 1337; app.set("view engine", "vash"); controllers.init(); http.createServer(app).listen(port); 

homeController.js

 (function (homeController) { homeController.init = function (app) { app.get("/", function (req, res) { res.render("index", { title: "Express + Vash" }); }); }; })(module.exports); 

index.js

 (function (controllers) { var homeController = require("./homeController"); controllers.init = function (app) { homeController.init(app); }; })(module.exports); 

问题是我得到这个错误。

 C:\Users\Utku\documents\visual studio 2015\Projects\TheBoard5\TheBoard5\controll ers\homeController.js:5 app.get("/", function (req, res) { ^ TypeError: Cannot read property 'get' of undefined at Object.homeController.init (C:\Users\Utku\documents\visual studio 2015\Pr ojects\TheBoard5\TheBoard5\controllers\homeController.js:5:12) at Object.controllers.init (C:\Users\Utku\documents\visual studio 2015\Proje cts\TheBoard5\TheBoard5\controllers\index.js:5:24) at Object.<anonymous> (C:\Users\Utku\documents\visual studio 2015\Projects\T heBoard5\TheBoard5\server.js:12:13) at Module._compile (module.js:571:32) at Object.Module._extensions..js (module.js:580:10) at Module.load (module.js:488:32) at tryModuleLoad (module.js:447:12) at Function.Module._load (module.js:439:3) at Module.runMain (module.js:605:10) at run (bootstrap_node.js:420:7) 

Answer 1

你错过了通过的app

 controllers.init(); 

它应该是

 controllers.init(app);