2.koa2中用mongoose连接Mongodb

1.安装：
　　npm install mongoose --save-dev
2.koa项目中创建models文件夹:
创建Users.js
　　let mongoose = require('mongoose');

　　let Users = mongoose.model('users', new mongoose.Schema({  
      　　email: String,   
      　　pwd: String
    },{_id:true}));

　　module.exports =  Users;
3.routers/users.js中写:
　　let mongoose = require('mongoose');
　　let Users = require('../models/Users')

　　router.post('/register', async function (ctx, next) {
  　　// let email = ctx.request.body['email'];
  　　// let pwd = ctx.request.body['pwd'];
  　　// ctx.body = 'email:'+email+",pwd:"+pwd;
  　　let conn = mongoose.connect('mongodb://localhost/partner');
  
  　　delete ctx.request.body['repwd'];
  　　let users = new Users(ctx.request.body);
  　　let rs = await users.save();
  　　console.log(rs);
  　　ctx.body = rs;
　　});