基于express开发查询mongodb数据库

公冶和豫
2023-12-01

pm2 reload all(刷新)

一、安装monoose(链接数据库)

二、创建models(mongoose创建model实体,通过实体和mongodb关联数据库)

models/goods.js

var mongoose=require('mongoose')
var Schema=mongoose.Schema;
var productSchema=new Schema({
    "productId" :String,
    "productName":String,
    "salePrice":Number,
    "productImage": String,
    "productUrl": String
    
})
module.exports=mongoose.model('Good',productSchema);

三、创建路由(通过路由查看接口,通过路由调model实体,通过model的api查询数据库)

routes/goods.js

/*二级路由*/
var express = require('express');
var router = express.Router();
var mongoose=require('mongoose');
var Goods=require('../models/goods');
//链接数据库
mongoose.connect('mongodb://127.0.0.1:27017/dumall');
//监听数据库是否链接成功
mongoose.connection.on("connected",function(){
	   console.log('mongoose connect success');
})
mongoose.connection.on("error",function(){
	   console.log('mongoose connect success');
})
mongoose.connection.on("disconnected",function(){
	   console.log('mongoose connect success');
})
router.get("/",function(req,res,next){
	Goods.find({},function(err,doc){
		if(err){
			res.json({
				status:'1',
				meg:err.message
			})
		}else{
			res.json({
				status:'0',
				msg:'',
				result:{
					count:doc.length,
					list:doc
				}
			})
		}
	})
})
module.exports=router;

配置路由app.js

var goods = require('./routes/goods');

app.use('/goods', goods);

四、基于mongoose实现商品列表查询功能

访问http://localhost:3000/goods即可查看数据库返回结果

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