运行 MEAN 应用程序时出现“无默认引擎”错误

Posted 2023-03-11

【中文标题】运行 MEAN 应用程序时出现“无默认引擎”错误

【英文标题】："no default engine" error when running MEAN application

【发布时间】：2019-02-07 14:41:20

【问题描述】：

错误：无法在视图目录“/var/www/html/mean/mean-secure1/views”中查找视图“错误” 在 Function.render (/var/www/html/mean/mean-secure1/node_modules/express/lib/application.js:581:17) 在 ServerResponse.render (/var/www/html/mean/mean-secure1/node_modules/express/lib/response.js:1008:7) 在 /var/www/html/mean/mean-secure1/app.js:50:7 在 Layer.handle_error (/var/www/html/mean/mean-secure1/node_modules/express/lib/router/layer.js:71:5) 在 trim_prefix (/var/www/html/mean/mean-secure1/node_modules/express/lib/router/index.js:315:13) 在 /var/www/html/mean/mean-secure1/node_modules/express/lib/router/index.js:284:7 在 Function.process_params (/var/www/html/mean/mean-secure1/node_modules/express/lib/router/index.js:335:12) 在下一个（/var/www/html/mean/mean-secure1/node_modules/express/lib/router/index.js:275:10） 在 /var/www/html/mean/mean-secure1/app.js:39:3 在 Layer.handle [as handle_request] (/var/www/html/mean/mean-secure1/node_modules/express/lib/router/layer.js:95:5) 在 trim_prefix (/var/www/html/mean/mean-secure1/node_modules/express/lib/router/index.js:317:13) 在 /var/www/html/mean/mean-secure1/node_modules/express/lib/router/index.js:284:7 在 Function.process_params (/var/www/html/mean/mean-secure1/node_modules/express/lib/router/index.js:335:12) 在下一个（/var/www/html/mean/mean-secure1/node_modules/express/lib/router/index.js:275:10） 在 SendStream.error (/var/www/html/mean/mean-secure1/node_modules/serve-static/index.js:121:7) 在 SendStream.emit (events.js:182:13)

app.js

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var bodyParser = require('body-parser');
var morgan = require('morgan');
var mongoose = require('mongoose');
var passport = require('passport');
var config = require('./config/database');

var api = require('./routes/api');
var app = express();
//app.set('view engine', 'pug');

mongoose.Promise = require('bluebird');
mongoose.connect(config.database,  promiseLibrary: require('bluebird') )
  .then(() =>  console.log('connection succesful'))
  .catch((err) => console.error(err));

app.use(passport.initialize());

app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded('extended':'false'));
app.use(express.static(path.join(__dirname, 'dist')));
app.use('/books', express.static(path.join(__dirname, 'dist')));
app.use('/api', api);
//app.use(express.static(path.join(_dirname, 'public')));

app.set('views', path.join(__dirname, 'views'));
app.engine('html', require('ejs').renderFile);
app.set('view engine', 'html');


// catch 404 and forward to error handler
app.use(function(req, res, next) 
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
);

// error handler
app.use(function(err, req, res, next) 
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : ;

  // render the error page
  res.status(err.status || 500);
  res.render('error');
);

module.exports = app;

【问题讨论】：

Error: No default engine was specified and no extension was provided的可能重复

@mehta-rohan 你的意思是需要更改 routes/api.js

@mehta-rohan 请帮忙？

【参考方案1】：

如果您想使用 ejs 模板作为您的视图引擎，那么您可以使用以下代码为您的节点应用程序设置视图引擎

const ejs=require("ejs");    
app.set('view engine','ejs');