3-1 mongoose

一、安装

npm i mongoose -S

二、模块化

//models/db.js
const mongoose = require('mongoose');
mongoose.connect( 'mongodb://127.0.0.1:27017/eggcms', {useNewUrlParser: true},(err)=>{
    if(err) throw err;
    console.log("database连接成功")
});
module.exports = mongoose;

//models/user.js
var mongoose = require('./db');
var UserSchema = new mongoose.Schema({
    name:String,
    age:Number
})
var User =  mongoose.model('User',UserSchema,'user');
module.exports = User;

//app.js引入
const UserModel = require('./model/user');
UserModel.find({},(err,doc)=>{
    console.log(doc)
})