Node.js使用Express连接MongoDB数据库完整教程

var mongoose=require('mongoose')
mongoose.connect('mongodb://127.0.0.1:27017/reactobj',function(err){
    if(!err){
        console.log('数据库连接成功');
    }
})
module.exports=mongoose

var mongoose=require('./Conn')
var Schema=mongoose.Schema
let CartSchema=new Schema({
   name:String,
   prize:Number,
   phopo:String,
    num:Number
})
const CartModel = mongoose.model("cart",CartSchema)
module.exports={CartModel}

var express = require('express');
var router = express.Router();
var {CartModel}=require('../conn/Cart')
/* GET home page. */
// router.get('/', function(req, res, next) {
//   res.render('index', { title: 'Express' });
// });
// 购物车添加
router.post('/addCart',async (req,res)=>{
  let data=await CartModel.create(req.body)
  res.send({code:200,msg:'添加成功'})
})
// 购物车查找
router.get('/getCart',async (req,res)=>{
  let data=await CartModel.find({}).exec()
  res.send({code:200,msg:'成功',data})
})
module.exports = router;

var cors=require('cors')
app.use(cors())