mongoDB

 

开启后端服务

 

配置路由接口

 const express = require("express");
 const BodyParser = require("body-parser");
 const Cors = require("cors");
 const App = express();
 App.use(Cors());
 App.use(BodyParser.json());
 App.use(BodyParser.urlencoded({ extended: true })); App.listen(3001, () => {   console.log("local    http://127.0.0.1:3001"); }); 

 

引入数据库

const mongoose = require("mongoose");
 // 1.连接
 const app = mongoose.createConnection("mongodb://127.0.0.1:27017");
 // 2.开启监听
 app.on("open", () => {   console.log("数据库连接成功！");
 }); app.on("error", () => {   console.log("数据库连接失败！"); });
 app.on("close", () => {   console.log("数据库关闭！"); });
 

 

暴露

 module.exports = {
   DBS: app, // 数据库 用module创建集合
   SCHEMA: mongoose.Schema, //创建规则
   TYPES: mongoose.Schema.Types //指定类型
 };