Question

我刚接触使用Express和Mongoos编写API，但我认为应该有用的东西让我感到悲伤。

我正在尝试尽可能模块化的东西，所以我有我的主app.js，一个model.js然后我的routes.js

这是我的app.js：

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var cors = require('cors');

mongoose.connect('mongodb://localhost/guestbook');

var app = express();

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(cookieParser());
app.use(cors());    

app.use('/api', require('./routes/api'));


    // changes it to use the optimized version for production
    app.use(express.static(path.join(__dirname, '/dist')));

    // production error handler
    // no stacktraces leaked to user
    app.use(function(err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {
            message: err.message,
            error: {}
        });
    });


module.exports = app;

这是我在/ api（路线文件）中的内容

//DEPENDENCIES
var express = require('express');
var router = express.Router();


//GUESTBOOK END POINTS
var Guestbook = require('../models/guestbook')

router.route('/guestbook')

  .post(function(req, res){

  var guestbook = new Guestbook();

    guestbook.firstname = req.body.firstname;
    guestbook.lastname = req.body.lastname;
    guestbook.email = req.body.email;
    guestbook.postedon = req.body.postedon;
    guestbook.comment = req.body.comment;
    guestbook.rate = req.body.rate;

    guestbook.save(function(err){
      if(err)
        res.send(err);

        res.json({message:'Post created!'})

    });

  })

  .get(function(req, res){
    guestbook.find(function(err, guestbook){
      if(err)
        res.send(err);

        res.json(guestbook);
    });

  });





//RETURN ROUTER AS MODULE
module.exports = router;

最后，这是我的模特：

//DEPENDENCIES
var restful = require('node-restful');
var mongoose = restful.mongoose;

var guestbookSchema = new mongoose.Schema({
  firstname: String,
  lastname: String,
  email: String,
  postedon: Date,
  comment: String,
  rate: Number
});



//RETURN MODEL


module.exports = mongoose.model('guestbook', guestbookSchema);

同样，帖子有效，但得不到。

这是我获得的console.log：

Error: No default engine was specified and no extension was provided.
   at new View (/Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/view.js:62:11)
   at EventEmitter.render (/Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/application.js:569:12)
   at ServerResponse.render (/Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/response.js:961:7)
   at /Users/christophernakea/Documents/Projects/TestAPIExpress/server/app.js:32:13
   at Layer.handle_error (/Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/router/layer.js:71:5)
   at trim_prefix (/Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/router/index.js:310:13)
   at /Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/router/index.js:280:7
   at Function.process_params (/Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/router/index.js:330:12)
   at next (/Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/router/index.js:271:10)
   at Layer.handle_error (/Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/router/layer.js:67:12)
   at trim_prefix (/Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/router/index.js:310:13)
   at /Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/router/index.js:280:7
   at Function.process_params (/Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/router/index.js:330:12)
   at Immediate.next (/Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/router/index.js:271:10)
   at Immediate.<anonymous> (/Users/christophernakea/Documents/Projects/TestAPIExpress/server/node_modules/express/lib/router/index.js:618:15)
   at Immediate.immediate._onImmediate (timers.js:435:18)

Answer 1

错误告诉您没有使用express框架设置模板引擎。请参阅与此主题相关的express guide。

这一行

res.render('error', {
   message: err.message,
   error: {}
});

呈现模板。但是你没有配置使用哪一个。

Answer 2

问题是你试图在不指定模板引擎的情况下渲染页面，因为你只创建了一个API，你不需要渲染任何页面，所以你需要只返回一个json res.render（＆＃39;错误＆＃39;，{ 消息：err.message，错误：{}

你可以用res.json替换它（＆＃39;错误＆＃39;：err.message）

使用Mongoos不要使用Express

2 个答案: