Server Discovery And Monitoring engine is deprecated

Question

I am using Mongoose with my Node.js app and this is my configuration:

mongoose.connect(process.env.MONGO_URI, {
   useNewUrlParser: true,
   useUnifiedTopol         


        

Answer 1

i had the same errors popping up each time and this worked for me

mongoose.connect("mongodb://localhost:27017/${yourDB}", {
    useNewUrlParser: true,
    useUnifiedTopology: true

}, function (err) {
    if (err) {
        console.log(err)
    } else {
        console.log("Database connection successful")
    }
});

Answer 2

mongoose.connect('mongodb://localhost:27017/Tododb', { useNewUrlParser: true, useUnifiedTopology: true });

Will remove following errors:-

(node:7481) 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.

(node:7481) DeprecationWarning: 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.

Answer 3

This worked for me

For folks using MongoClient try this:

MongoClient.connect(connectionurl, 
  {useUnifiedTopology: true, useNewUrlParser: true},  callback() {

For mongoose:

mongoose.connect(connectionurl, 
         {useUnifiedTopology: true, useNewUrlParser: true}).then(()=>{

Remove other connectionOptions

Answer 4

Add the useUnifiedTopology option and set it to true.

Set other 3 configuration of the mongoose.connect options which will deal with other remaining DeprecationWarning.

This configuration works for me!

const url = 'mongodb://localhost:27017/db_name';
mongoose.connect(
    url, 
    { 
        useNewUrlParser: true, 
        useUnifiedTopology: true,
        useCreateIndex: true,
        useFindAndModify: false
    }
)

This will solve 4 DeprecationWarning.

1. 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.
2. 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.
3. Collection.ensureIndex is deprecated. Use createIndexes instead.
4. DeprecationWarning: Mongoose: findOneAndUpdate() and findOneAndDelete() without the useFindAndModify option set to false are deprecated. See: https://mongoosejs.com/docs/deprecations.html#-findandmodify-.

Hope it helps.

Answer 5

const mongoose = require("mongoose");

mongoose.connect('mongodb://localhost:27017/Edureka',{ useNewUrlParser: true, useUnifiedTopology: true }, (error)=> {
    const connectionStatus = !error ? 'Success': 'Error Connecting to database';
    console.log(connectionStatus);
});

Answer 6

if you used typescript add config to the MongoOptions

const MongoOptions: MongoClientOptions = {
  useNewUrlParser: true,
  useUnifiedTopology: true,
};

      const client = await MongoClient.connect(url, MongoOptions);

if you not used typescript  
const MongoOptions= {
  useNewUrlParser: true,
  useUnifiedTopology: true,
};