這個想要弄得清楚，最好學一下后臺語言，如php了解表單數據是怎么提交給服務器端的。就能完全明白。步驟都一樣，討論區有集成環境下載地址

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

應該要這樣

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)

為啥我有單引號也不行

同求 相同的問題

//?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);
????????});
????}
});

問題出在這段代碼里，找了半天，一句一句跟人家對，還是找不出毛病。。。懇請各位大哥大姐幫我看看問題在哪。。。

這是app.js 源碼

"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?首頁',
??????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?后臺',
??????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?電影列表頁',
??????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?后臺更新頁',
				movie:?movie
			});
		});
	}
});