使用Node.js连接MongoDB 提示连接失败

Question

问题描述

目前正在学习nodejs+mongodb

环境基本搭建完成。
根据文档，访问http://localhost:27017/能够显示You are trying to access MongoDB on the native driver port. For http diagnostic access, add 1000 to the port number表明 mongodb服务已经启动。
执行连接数据库的代码 无法连接到数据库
希望有大佬能够指点一二，不胜感激！！！

执行node app.js代码后控制台的打印

connection error: { MongoNetworkError: failed to connect to server [localhost:27017] on first connect [MongoError: Server at localhost:27017 reports maximum wire version 0, but this version of the Node.js Driver requires at least 2 (MongoDB 2.6)]

相关代码

app.js:

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/test',{ useNewUrlParser: true });

var db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function() {
  console.log('we\'re connected!')
});

控制台打印信息中能看到 上述代码执行时有尝试连接数据库，但是连接上后就被断开。

Sat Aug 10 21:56:45.997 [initandlisten] connection accepted from 127.0.0.1:59972 #4 (1 connection now open)
Sat Aug 10 21:56:46.024 [conn4] end connection 127.0.0.1:59972 (0 connections now open)

Answer 1

connection error: { MongoNetworkError: failed to connect to server [localhost:27017] on first connect [MongoError: Server at localhost:27017 reports maximum wire version 0, but this version of the Node.js Driver requires at least 2 (MongoDB 2.6)]

这个错误信息说的很清楚了，服务器与客户端的 wire 版本不兼容。

mongoosejs 有一个跟 mongodb 的兼容性表格:

MongoDB Server 2.4.x: mongoose ^3.8 or 4.x
MongoDB Server 2.6.x: mongoose ^3.8.8 or 4.x
MongoDB Server 3.0.x: mongoose ^3.8.22, 4.x, or 5.x
MongoDB Server 3.2.x: mongoose ^4.3.0 or 5.x
MongoDB Server 3.4.x: mongoose ^4.7.3 or 5.x
MongoDB Server 3.6.x: mongoose 5.x
MongoDB Server 4.0.x: mongoose ^5.2.0

查一查是不是对得上。