安装

npm install mongoose --save

db\index.js

const mongodb = require('mongoose')

const connectDB = async () => {
    
    
//note为mongodb中的一个数据库
  return await mongodb.connect("mongodb://127.0.0.1:27017/note")
}

module.exports = {
    
    
  connectDB
}

model\user.js

const mongodb = require('mongoose')

const Schema = mongodb.Schema;

const UserModel = new Schema({
    
    
  name: String,
  id: String,
  tel: String,
  hobby: String,
  updateDate: String,
})
//user为一个集合（table），与数据库命名一致
const Model = mongodb.model('UserModal', UserModel, 'user');
module.exports = Model

index.js

const {
    
    
  server
} = require('./server/index')

const {
    
    
  connectDB
} = require("./db/index.js")

const Model = require("./model/user")

// 连接mongodb数据库
connectDB().then(res => {
    
    

})

// 监听请求
server.on('request', async function (req, res) {
    
    

  const {
    
    
    method,
    url,
  } = req

  console.log('url', url, method);

  if (url === '/user' && method === 'GET') {
    
    
    // 查找集合中的数据（user)
    const data = await Model.find();
    res.end(JSON.stringify({
    
    
      code: 0,
      data: {
    
    
        list: data || []
      }
    }))
  }

})
server.listen(3000, "localhost", () => {
    
    
  // console.log('listen');
})