TypeError：无法读取未定义的属性“获取”（Node.js）

Posted 2023-02-24

【中文标题】TypeError：无法读取未定义的属性“获取”（Node.js）

【英文标题】：TypeError: Cannot read property 'get' of undefined (Node.js)

【发布时间】：2017-02-06 22:49:00

【问题描述】：

我是 Node.js 的新手，我需要帮助。我正在尝试使用 express (^4.14.1)、路径 (^0.12.7) 和 vash (^0.12.2) Visual Studio 中的模块。我刚刚创建了几个文件，下面将向您展示。 homeController.js 和 index.js 文件位于 controllers 文件夹中。

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);

问题是我收到了这个错误。

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)

【参考方案1】：

你错过了通过app 排队

controllers.init();

应该是

controllers.init(app);