第一次在这贴代码，话说上次排版有点乱，现在已经改过来了~~谢谢大家提醒！！

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://localhost:27017/imooc_projects')
app.set('views', './views/pages')
app.set('view engine', 'jade')
app.use(bodyParser.urlencoded({ extended: true }));
app.use(express.static(path.join(__dirname, 'bower_components')))
app.listen(port)
console.log('imooc started on port ' + port);
//index page
app.get('/', function (req, res) {
    Movie.fetch(function(err, movies) {
        if (err){
            console.log(err)
        }
        res.render('index', {
            title: 'imooc 首页',
            movies: movies
        })
    })
})
//detail page
app.get('/movie/:id', function (req, res) {
    var id = req.params.id
    console.log("putain")
    console.log(id)
    Movie.findById(id, function(err, movie) {           
        console.log(movie)
        res.render('detail', {
            title: 'imooc' + movie.title,
            movie: movie
        })
    })
})
//admin page
app.get('/admin/movie', function (req, res) {
    res.render('admin', {
        title: 'imooc 后台录入页',
        movie: {
            director: '',
            country: '',
            title: '',
            year: '',
            poster: '',
            language: '',
            flash: '',
            summary: ''
        }
    })
})
// admin update movie
app.get('/admin/update/:id', function(req, res) {
    var id = req.params.id
    if (id) {
        Movie.findById(id, function(err, movie) {
            res.render('admin', {
                title: 'imooc 后台更新页',
                movie: movie
            })
        })
    }
})
//admin post movie
app.post('/admin/movie/new', function(req, res) {
    var id = req.body.movie._id
    var movieObj = req.body.movie
    var _movie
    console.log(id)
    if (id !== undefined) {
        Movie.findById(id, function(err, movie) {
            if (err) {
                console.log(err)
            }
            console.log("alkfoaj1")
            _movie = _.extend(movie, movieObj)
            //console.log(movie)
            //console.log(movieObj)
            //console.log(_movie)
            //console.log("alkfoaj2")
            _movie.save(function(err, movie) {
                if (err) {
                    console.log(err)
                }
            //console.log("alkfoaj3")
                res.redirect('/movie/' + movie._id)
            })
        })
    }
    else {
        console.log("else")
        _movie = new Movie({
            director: movieObj.director,
            title: movieObj.title,
            country: movieObj.country,
            language: movieObj.language,
            year: movieObj.year,
            poster: movieObj.poster,
            summary: movieObj.summary,
            flash: movieObj.flash
        })
        _movie.save(function(err, movie) {
            if (err) {
                console.log(err)
            }
            //console.log(movie._id + "a")
            res.redirect('/movie/' + movie._id)
        })
    }
})
//list page
app.get('/admin/list', function (req, res) {
    Movie.fetch(function(err, movies) {
        if (err){
            console.log(err)
        }
        res.render('list', {
            title: 'imooc 列表页',
            movies: movies
        })
    })
})
 \n``` 
 
```js\n 
    var mongoose =require ('mongoose')
    var MovieSchema = new mongoose.Schema({
    director: String,
    title: String,
    language: String,
    country: String,
    summary: String,
    flash: String,
    poster: String,
    year: Number, 
    meta:{
        createAt:{
            type: Date,
            default: Date.now()
        },
        updateAt:{
            type: Date,
            default: Date.now()
        }
    }
})
MovieSchema.pre('save',function(next) {
    if(this.isNew){
        this.meta.createAt = this.meta.updateAt = Date.now();
    }
    else{
        this.meta.updateAt = Date.now()
    }
    next()
    //console.log("aa")
})
MovieSchema.statics = {
    fetch: function(cb){
        return this
            .find({})
            .sort('meta.updateAt')
            .exec(cb)
    },
    findById: function(id, cb){
        //console.log("aaa")
        return this
            .findOne({_id: id})
            .exec(cb)
    }
}
module.exports = MovieSchema
 \n```  
 
 ```js\n 
extend ../layout
block content
    .container
        .row
            form.form-horizontal(method="post",action="/admin/movie/new")
                //-input(type="hidden", name="movie[_id]", value="#{movie._id}")
                .form-group
                    label.col-sm-2.control-label(for="inputTitle") 电影名字
                    .col-sm-10
                        input#inputTitle.col-sm-10.form-control(type="text",name="movie[title]",value="#{movie.title}")
                .form-group
                    label.col-sm-2.control-label(for="inputDirector") 电影导演
                    .col-sm-10
                        input#inputDirector.col-sm-10.form-control(type="text",name="movie[director]",value="#{movie.director}")
                .form-group
                    label.col-sm-2.control-label(for="inputCountry") 国家
                    .col-sm-10
                        input#inputCountry.col-sm-10.form-control(type="text",name="movie[country]",value="#{movie.country}")
                .form-group
                    label.col-sm-2.control-label(for="inputLanguage") 语种
                    .col-sm-10
                        input#inputLanguage.col-sm-10.form-control(type="text",name="movie[language]",value="#{movie.language}")
                .form-group
                    label.col-sm-2.control-label(for="inputPoster") 海报地址
                    .col-sm-10
                        input#inputPoster.col-sm-10.form-control(type="text",name="movie[poster]",value="#{movie.poster}")
                .form-group
                    label.col-sm-2.control-label(for="inputFlash") 片源地址
                    .col-sm-10
                        input#inputFlash.col-sm-10.form-control(type="text",name="movie[flash]",value="#{movie.flash}")
                .form-group
                    label.col-sm-2.control-label(for="inputYear") 上映年份
                    .col-sm-10
                        input#inputYear.col-sm-10.form-control(type="text",name="movie[year]",value="#{movie.year}")
                .form-group
                    label.col-sm-2.control-label(for="inputSummary") 电影简介
                    .col-sm-10
                        input#inputSummary.col-sm-10.form-control(type="text",name="movie[summary]",value="#{movie.summary}")
                .form-group
                    .col-sm-offset-2.col-sm-10
                    button.btn.btn-default(type="submit") 录入

报错：

也就是这段代码执行了两次： 经 @eqiuno 提醒，貌似没发现重复定义的路由~~到底哪里的问题？