express+mlab连接配置远程数据库

在入口配置js中添加

const MongoClient = require('mongodb').MongoClient;
const uri = "mongodb+srv://账号:密码@cluster0-lfioo.mongodb.net/test?retryWrites=true&w=majority";
const client = new MongoClient(uri,{ useUnifiedTopology: true });
client.connect().then(() => {
  console.log('连接成功!');
 })
 .catch(err => {
  console.log(err);
 });
``