这个想要弄得清楚，最好学一下后台语言，如php了解表单数据是怎么提交给服务器端的。就能完全明白。步骤都一样，讨论区有集成环境下载地址

if (id !== 'undefined' && id !== '')

应该要这样

TypeError: Cannot read property 'save' of undefined
    at E:\stq\stq\app.js:65:11
    at E:\stq\stq\node_modules\mongoose\lib\query.js:2745:9
    at tryCatcher (E:\stq\stq\node_modules\bluebird\js\release\util.js:16:23)
    at Promise._settlePromiseFromHandler (E:\stq\stq\node_modules\bluebird\js\release
\promise.js:512:31)
    at Promise._settlePromise (E:\stq\stq\node_modules\bluebird\js\release\promise.js
:569:18)
    at Promise._settlePromise0 (E:\stq\stq\node_modules\bluebird\js\release\promise.j
s:614:10)
    at Promise._settlePromises (E:\stq\stq\node_modules\bluebird\js\release\promise.j
s:689:18)
    at Async._drainQueue (E:\stq\stq\node_modules\bluebird\js\release\async.js:133:16
)
    at Async._drainQueues (E:\stq\stq\node_modules\bluebird\js\release\async.js:143:1
0)
    at Immediate.Async.drainQueues (E:\stq\stq\node_modules\bluebird\js\release\async
.js:17:14)
    at runCallback (timers.js:651:20)
    at tryOnImmediate (timers.js:624:5)
    at processImmediate [as _immediateCallback] (timers.js:596:5)

为啥我有单引号也不行

同求 相同的问题

// admin post movie
app.post('/admin/movie/new', function(req, res) {
    var id = req.body.movie._id;
    var movieObj = req.body.movie;
    var _movie;
 
    if (id !== undefined) {
        Movie.findById(id, (err,movie)=>{
            if (err) {
                console.log(err);
            }
 
            _movie = _.extend(movie, movieObj);
            _movie.save(function (err, movie) {
                if (err) {
                    console.log(err);
                };
 
                res.redirect('/movie/' + movie._id);
            })
        })
    }
    else{
        _movie = new Movie({
            doctor:movieObj.doctor,
            title:movieObj.title,
            country:movieObj.country,
            language:movieObj.language,
            year:movieObj.year,
            poster:movieObj.poster,
            flash:movieObj.flash,
            summary:movieObj.summary
        });
 
        _movie.save(function(err, movie) {
            if (err) {
                console.log(err);
            };
 
            res.redirect('/movie/' + movie._id);
        });
    }
});

问题出在这段代码里，找了半天，一句一句跟人家对，还是找不出毛病。。。恳请各位大哥大姐帮我看看问题在哪。。。

这是app.js 源码

"use strict";


var express = require('express');
var path = require('path')
var mongoose = require('mongoose');
var _ = require('underscore');
var Movie = require('./models/movie');
var port = process.env.PORT || 3000;
var app = express();
var bodyParser = require('body-parser');


mongoose.connect('mongodb://127.0.0.1:27017/imooc');
mongoose.connection.on('connected', function () {
  console.log('Connection success!');
});

app.set('views', './views/pages');
app.set('view engine', 'jade');
app.use(bodyParser.urlencoded({ extende: true}));
app.use(bodyParser.json());
app.use(express.static(path.join(__dirname,'./bower_components')));
app.use(express.static(path.join(__dirname,'./static')));
app.listen(port);

console.log('Imooc started on port ' + port);


app.get('/',(req,res)=>{
	Movie.fetch(function(err, movies) {
		if (err) {
			console.log(err);
		}
  res.render('index',{
      title:'MOMO 首页',
      movies:movies
  	})
  })
});

app.get('/movie/:id',(req,res)=>{
	var id = req.params.id;
	Movie.findById(id, (err,movie)=>{
	  res.render('detail',{
      title:'Imooc' + movie.title,
      movie: movie
  	});
	});
});

app.get('/admin/movie',(req,res)=>{
  res.render('admin',{
      title:'MOMO 后台',
      movie:{
        doctor:'',
        country:'',
        title:'',
        year:'',
        poster:'',
        language:'',
        flash:'',
        summary:'',
      }
  })
});

// admin post movie
app.post('/admin/movie/new', function(req, res) {
	var id = req.body.movie._id;
	var movieObj = req.body.movie;
	var _movie;

	if (id !== undefined) {
		Movie.findById(id, (err,movie)=>{
			if (err) {
				console.log(err);
			}

			_movie = _.extend(movie, movieObj);
			_movie.save(function (err, movie) {
				if (err) {
					console.log(err);
				};

				res.redirect('/movie/' + movie._id);
			})
		})
	}
	else{
		_movie = new Movie({
			doctor:movieObj.doctor,
			title:movieObj.title,
			country:movieObj.country,
			language:movieObj.language,
			year:movieObj.year,
			poster:movieObj.poster,
			flash:movieObj.flash,
			summary:movieObj.summary
		});

		_movie.save(function(err, movie) {
			if (err) {
				console.log(err);
			};

			res.redirect('/movie/' + movie._id);
		});
	}
});
// admin list
app.get('/admin/list',(req,res)=>{
	Movie.fetch(function(err, movies) {
		if (err) {
			console.log(err);
		}
  res.render('list',{
      title:'Imooc 电影列表页',
      movies: movies
  	})
	});
});

// admin update movie
app.get('/admin/update/:id',(req, res)=>{
	var id = req.params.id;

	if (id) {
		Movie.findById(id,(err,movie)=>{
			res.render('admin',{
				title: 'Imooc 后台更新页',
				movie: movie
			});
		});
	}
});