Express Js EJS Layouts Error: No default engine was specified and no extension was provided

Question

您好，我正在尝试在我的应用程序中使用 Express EJS 布局。一旦我尝试 app.use(expressEjsLayouts) 它就会抛出错误。没有它，应用程序工作得很好，但我想为我的模板使用 ExpressEjs-Layouts。请善待我，我对编码还很陌生 :) 我已经浏览了很多帖子，但找不到答案。这是我的 server.js

if (process.env.NODE_ENV !== 'production') {
  require('dotenv').config()
}

const express = require('express')
const app = express()
const passport = require('passport')
const flash = require('express-flash')
const session = require('express-session')
const methodOverride = require('method-override')
const indexRouter = require("./routes/index")

app.use(express.urlencoded({ extended: false }))
app.use(flash())
app.use(session({
  secret: process.env.SESSION_SECRET,
  resave: false,
  saveUninitialized: false
}))

app.use(passport.initialize())
app.use(passport.session())
const initializePassport = require('./passport-config')
const expressEjsLayouts = require('express-ejs-layouts')

initializePassport(
  passport,
  email => indexRouter.users.find(user => user.email === email),
  id => indexRouter.users.find(user => user.id === id)
)    
// Set Template Engine
app.use(expressEjsLayouts) // THIS SEEMS TO BE WHAT MAKES IT CRASH
app.set("layout", "layouts/layout") 
app.set('view-engine', 'ejs')
app.set("views", __dirname + "/views")


// Static Files
app.use(express.static("public"))


app.use("/", indexRouter.router)
app.use(methodOverride('_method'))

app.listen(process.env.PORT || 3000)

这是错误：

Error: No default engine was specified and no extension was provided.
    at new View (C:\Users\admin\Documents\Alles mit JS\gefahrengueterproject\node_modules\express\lib\view.js:61:11)
    at Function.render (C:\Users\admin\Documents\Alles mit JS\gefahrengueterproject\node_modules\express\lib\application.js:570:12)
    at ServerResponse.render (C:\Users\admin\Documents\Alles mit JS\gefahrengueterproject\node_modules\express\lib\response.js:1012:7)
    at ServerResponse.res.render [as __render] (C:\Users\admin\Documents\Alles mit JS\gefahrengueterproject\node_modules\express-flash\lib\express-flash.js:29:16)
    at C:\Users\admin\Documents\Alles mit JS\gefahrengueterproject\node_modules\express-ejs-layouts\lib\express-layouts.js:113:20
    at tryHandleCache (C:\Users\admin\Documents\Alles mit JS\gefahrengueterproject\node_modules\ejs\lib\ejs.js:260:5)
    at View.exports.renderFile [as engine] (C:\Users\admin\Documents\Alles mit JS\gefahrengueterproject\node_modules\ejs\lib\ejs.js:485:10)
    at View.render (C:\Users\admin\Documents\Alles mit JS\gefahrengueterproject\node_modules\express\lib\view.js:135:8)
    at tryRender (C:\Users\admin\Documents\Alles mit JS\gefahrengueterproject\node_modules\express\lib\application.js:640:10)
    at Function.render (C:\Users\admin\Documents\Alles mit JS\gefahrengueterproject\node_modules\express\lib\application.js:592:3)

Answer 1

您需要告诉 Express 您正在使用哪个视图引擎。您可以使用 app.set() 方法来完成。它需要两个参数 1.what 你正在设置。在这种情况下是一个视图引擎 2.the 您希望使用的视图引擎类型

例如app.set('view engine', 'ejs')；或 app.set('view engine', 'pug')；

这是文档https://expressjs.com/en/guide/using-template-engines.html

Express Js EJS Layouts Error: No default engine was specified and no extension was provided

Express Js EJS Layouts Error: No default engine was specified and no extension was provided

javascript

flash

node.js

express