nodejs series-summary of problems using nodejs to link MongoDB database

Reference documentation

• mongodb
• Mongoose

Question 1. The preferredcms_db_name and cms_db_collection options are not supported

throw new error_1.MongoParseError(`${optionWord} ${Array.from(unsupportedOptions).join(', ')} ${isOrAre} not supported`);
        ^

MongoParseError: options preferredcms_db_name, cms_db_collection are not supported

problem solved:

• step1: Delete the preferredcms_db_name and cms_db_collection option configurations in the connection string
• step2: Reconnect

问题2：MongoServerSelectionError: Server at hkdbspwv601:27017 reports maximum wire version 5, but this version of the Node.js Driver requires at least 6 (MongoDB 3.6)

version in my current code

{
  "dependencies": {
    "mongodb": "^5.1.0"
  }
}

The mongod version of the server

solution:

If you are like me, you are using mongodb

const { MongoClient } = require('mongodb');
const url = 'mongodb://XXXXXXX';
const client = new MongoClient(url);
const dbName = 'AAAAA';
async function main() {
  await client.connect();
  console.log('Connected successfully to server');
  const db = client.db(dbName);
  const collection = db.collection('XXXXXX');
  const findResult = await collection.find({}).project({ _id: 'XXXXXXX' }).toArray()
  console.log('Found documents =>', findResult);
  // the following code examples can be pasted here...

  return 'done.';
}

main()
  .then(console.log('Connected.'))
  .catch(console.error)
  .finally(() => client.close());

• Documentation: mongodb
• step1: Go to the official website to compare the version. Click here to go directly to the official website link.
• step2: Update the local code and use the comparison version (after comparison, the maximum version number I should use is 4.1)
• step3: Re-download dependencies and run the code
• step4: Run the code and connect successfully~
  
  

If you are using mongoose, the solution steps are as follows:

const mongoose  = require('mongoose')
mongoose.connect('mongodb://127.0.0.1:27017/ele-admin') 
.then(() => console.log('数据库连接成功'))
.catch(err => console.log('数据库连接失败', err));

• step1: Go to the official website to compare the version. Click here to go directly to the official website link.

• step2: Update the local code and use the comparison version (after comparison, the maximum version number I should use is 5.0.0)

• step3: Re-download dependencies and run the code

• step4: Run the code and connect successfully~
  

• That’s all for today~

• Friends, (￣ω￣(￣ω￣〃 (￣ω￣〃)ゝSee you tomorrow~~

• Everyone, please be happy every day

Everyone is welcome to point out what needs to be corrected in the article ~
there is no end to learning and win-win cooperation

Welcome the little brothers and sisters who pass by to put forward better opinions~~