Node.js中Mongoose连接MongoDB无响应及数据存储问题解决

环境信息 #

• 操作系统：Windows 10
• 编辑器：VS Code 1.74.2
• Node.js版本：18.12.1
• MongoDB版本：4.13
• Mongoose版本：从5.0.1升级至5.13.15

问题过程与错误 #

1. Mongoose v5.0.1连接成功但无法插入数据
   使用以下代码能正常输出Connected...：

   const mongoose = require('mongoose')
   
   mongoose.connect('mongodb://localhost/playground')
       .then(() => console.log('Connected...'))
       .catch(err => console.error('Could not connect...', err))
   

   但调用.save()插入JSON对象时，抛出错误：

   errmsg: 'Unsupported OP_QUERY command: insert. The client driver may require an upgrade.',
     code: 352,
     codeName: 'UnsupportedOpQueryCommand'
   

2. 升级Mongoose后连接失败
   将Mongoose升级到5.13.15后，原代码出现弃用警告：

   (node:10772) DeprecationWarning: current URL string parser is deprecated, and will be removed in a future version. To use the new parser, pass option { useNewUrlParser: true } to MongoClient.connect.
   (Use `node --trace-deprecation ...` to show where the warning was created)
   (node:10772) [MONGODB DRIVER] Warning: Current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.
   

   同时报错连接失败：

   MongoNetworkError: failed to connect to server [localhost:27017] on first connect
   

3. 添加连接选项后超时无输出
   按照警告提示添加选项后，代码如下，但连接超时无任何输出：

   mongoose.connect('mongodb://localhost/playground', { useNewUrlParser: true, useUnifiedTopology: true })
       .then(() => console.log('Connected...'))
       .catch(err => console.error('Could not connect...', err))
   

解决方法 #

将连接URL替换为mongodb://127.0.0.1:27017/playground，即可正常连接并插入数据。

内容的提问来源于stack exchange，提问作者user10942300