express与mongoose结合最佳实践探索

基本布局的建立

express my-app
cd my-app
npm install -S mongoose

一、布局的变动

/my-app
  - bin
  |    main.js   ##程序的入口
  - models
  |    index.js  ## Schema集中定义
  + routes      ## Express的Router
  mongo.js    ## mongo的模型定义
  app.js        ## express的配置管理
  package.json
  ...

二、Schema定义集中

【/models/index.js】

let BookSchema={name:String,price:Number}
module.exports={BookSchema}

三、mogoose的模型定义

【/mongo.js】

const  mongoose=require('mongoose')
const model=require('./models')
let Book=mongoose.model("book",model.BookSchema)

四、入口程序

【/main.js】

const mongoose=require('mongoose')
const mongo=require('../mongo')
const app=require('../app')
const http=require('http')

let mongoUrl='mongodb://localhost:27017/test12'
let httpPort=3000
let server=http.createServer(app)
mongoose.connect(mongoUrl,err=>{
    server.listen(httpPort)
})

server.on('listening',()=>{
    console.log(`express start at ${server.address().host} :${server.address().port}`)
})
server.on('error',(err)=>console.log("express error"))
    mongoose.connection.on('open',function () {
})

mongoose.connection.on('open',function () {
    console.log(`mongoose connected in ${mongoose.connection.host}:${mongoose.connection.port}`)
})

mongoose.connection.on('error',function (err) {
    console.log("mongoose connection error")
})

五、express与mongoose的对接

【routes/book.js 片段】

var express = require('express');
var router = express.Router();
const  mongoose=require('mongoose')
let Book=mongoose.model('book')
router.get('/', function(req, res, next) {
  Book.find({},function (err,newBook) {
    res.json(newBook);
  })
});