Question

我正在尝试在ubuntu 16.04中使用nodejs，我安装了node和npm但是我遇到了这个错误＆＃34; TypeError：无法读取属性＆＃39; _locals＆＃39;未定义＆＃34;当我尝试这个时：

var express = require("express");
    app = express();
    bodyParser = require("body-parser");
    mongoose = require("mongoose");

app.set("view engine", "ejs");

app.get("/", function(req,res){
    app.render("index");
});

app.listen(3000, function(){
    console.log("Server Started!");
})

它在终端输出：

Server Started!
TypeError: Cannot read property '_locals' of undefined
    at EventEmitter.render (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/application.js:548:11)
    at /home/luis/Documents/work/webdevBootcamp/test/app.js:9:6
    at Layer.handle [as handle_request] (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/router/layer.js:95:5)
    at next (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/router/route.js:131:13)
    at Route.dispatch (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/router/layer.js:95:5)
    at /home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/router/index.js:277:22
    at Function.process_params (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/router/index.js:330:12)
    at next (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/router/index.js:271:10)
    at expressInit (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/middleware/init.js:33:5)
    at Layer.handle [as handle_request] (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/router/index.js:312:13)
    at /home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/router/index.js:280:7
    at Function.process_params (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/router/index.js:330:12)
    at next (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/router/index.js:271:10)
    at query (/home/luis/Documents/work/webdevBootcamp/test/node_modules/express/lib/middleware/query.js:44:5)

当我加载localhost：3000时，它不会渲染ejs文件或让我使用send（）函数

app.get("/", function(req,res){
    app.send("whatever");
});

它说：

TypeError: app.send is not a function

我安装了express和ejs模块（运行npm install i -S express ejs mongoose body-parser）

Answer 1

@digit在评论中说： “你不应该调用app.send而不是res.send。应用程序是一个用于路由http请求的对象。”

问题在于我在做什么

app.get("/", function(req,res){
    app.send("whatever");
});

而不是

app.get("/", function(req,res){
    res.send("whatever"); // res instead of app
});

Answer 2

请设置您的views目录。示例：如果索引模板文件位于'src'

中

app.set('views', __dirname + '/src');

TypeError：无法读取属性＆＃39; _locals＆＃39;未定义的

2 个答案: