2013-5-6-express-tutorial-1.md

layout: post category : lessons tagline: “Supporting tagline” tags : [intro, beginner, jekyll, tutorial]

从零开始构建Express+Mongoose的程序⌗

关于Express的框架⌗

调用http、express和path模块⌗

http = require 'http'
path = require 'path'

生成express应用⌗

express = require 'express'
app = express()
app.configure(->
  # 设置端口
  app.set('port', process.env.PORT || 3000)
  # 设置视图和公共目录
  app.use(express.logger('dev'))
  # app.use(express.directory(__dirname + 'public'))
  app.use(express.static(path.join(__dirname, 'public')))
  app.use(express.favicon())
  # 设置视图渲染模板为jade
  app.set('views', __dirname + '/views')
  app.set('view engine', 'jade')

  # 设置查询体解析为json功能
  app.use(express.bodyParser({keepExtensions: true,     uploadDir: './public/resources'}))
  # 设置http方法重写，如使用put更改数据等
  app.use(express.methodOverride())
  # 设置cookie和session
  # app.use(express.cookieParser())
  # app.use(express.session({ secret: 'bang590' }))
  # 设置路由功能
  app.use(app.router)
  app.use(express.errorHandler({ dumpExceptions: true,     showStack: true }))
  app.enable('trust proxy')
  )

启动服务器⌗

port = process.env.PORT or 3000
http.createServer(app).listen(app.get('port'), ->
  console.log("Express server listening on port " + app.get('port'))
)

设置列表路由⌗

app.get('/blogs',mongodb.findAll)

设置新建路由⌗

app.get('/newblog', (req, res)->
  res.render('newblog',{title:'Input New Blog'})
)
app.post('/newblog', mongodb.create)

设置统一化路由⌗

app.all('/blog/:id/:op?',mongodb.findById)

分路由⌗

app.get('/blog/:id',mongodb.findById)
app.get('/blog/:id/edit',mongodb.findById)
app.put('/blog/:id/edit',mongodb.update)
app.post('/blog/:id/edit',mongodb.update)
app.get('/blog/:id/delete',mongodb.remo    ve)
app.get('*', (req, res)->
  res.send('what???', 404)
 )

关于Mongoose的框架⌗

确定数据库的初始化设置,连接blogs集合⌗

mongoose = require('mongoose')
mongoose.connect('localhost', 'blogs')

定义数据结构⌗

BlogId = mongoose.Schema.ObjectId
BlogSchema = mongoose.Schema({
    owner: BlogId,
    name: String,
    age: String,
    work: String,
    email: String,
    title:String,
    content:String,
    image:String,
    date:Date
})

生成表模型，可作为类使用⌗

Blog = mongoose.model('Blog', BlogSchema)

CRUD具体方法和函数⌗

create=(req,res)->
    url = req.files.post['image'].path
    json = {
	    name: req.body.post['name'],
	    age: req.body.post['age'],
	    work: req.body.post['work'],
	    email: req.body.post['email'],
	    title:req.body.post['title'],
	    content:req.body.post['content'],
	    image:url.slice(7,url.length),
	    date:req.body.post['date']
    }
    aBlog = new Blog(json)
    aBlog.save((err)->
	console.log "Hello! " + aBlog.name + " are "+     aBlog.work
	    )
    res.redirect('blogs')
module.exports.create = create

查找⌗

findAll =(req,res)->
    Blog.find({},(err,docs)->
	    res.render('blogs',{title:'Blogs',blog:docs})
    )
module.exports.findAll = findAll

findById =(req,res)->
    Blog.findById(req.params.id,(err,doc)->
	    console.log "Found " + doc
	    res.render('editblog',{title:'Blogs',blog:doc})
    )
module.exports.findById = findById

移除remove⌗

remove=(req,res)->
    Blog.findByIdAndRemove(req.params.id,(err,doc)->
	    console.log "removed!" + doc.name
	    res.redirect('blogs')
    )
module.exports.remove = remove

更新update⌗

update =(req,res)->
	Blog.findByIdAndUpdate(req.params.id,req.body.post,(err,docs)->
	    console.log docs + "updated!"
	    res.redirect('blogs')
    )
module.exports.update = update