MongoParseError: options useCreateIndex, useFindAndModify are not supported

I tried to run it and it said an error like the title. and this is my code:

const URI = process.env.MONGODB_URL;

mongoose.connect(URI, {
   useCreateIndex: true, 
   useFindAndModify: false, 
   useNewUrlParser: true, 
   useUnifiedTopology: true 
}, err => {
   if(err) throw err;
   console.log('Connected to MongoDB!!!')
})

I set the MONGODB_URL in .env :

MONGODB_URL = mongodb+srv://username:<password>@cluster0.accdl.mongodb.net/website?retryWrites=true&w=majority

How to fix it?

From the Mongoose 6.0 docs:

>useNewUrlParser, useUnifiedTopology, useFindAndModify, and useCreateIndex are no longer supported options. Mongoose 6 always behaves as if useNewUrlParser, useUnifiedTopology, and useCreateIndex are true, and useFindAndModify is false. Please remove these options from your code.

Same problem was with me but if you remove useCreateIndex, useFindAndModify it will solve the problem just write :

const URI = process.env.MONGODB_URL;

mongoose.connect(URI, {

useNewUrlParser: true, 

useUnifiedTopology: true 

}, err => {
if(err) throw err;
console.log('Connected to MongoDB!!!')
});

It worked for me.

No More Deprecation Warning Options

useNewUrlParser, useUnifiedTopology, useFindAndModify, and useCreateIndex are no longer supported options. Mongoose 6 always behaves as if useNewUrlParser, useUnifiedTopology, and useCreateIndex are true, and useFindAndModify is false. Please remove these options from your code.

src --> https://mongoosejs.com/docs/migrating_to_6.html#no-more-deprecation-warning-options

// No longer necessary:
mongoose.set('useFindAndModify', false);

await mongoose.connect('mongodb://localhost:27017/test', {
  useNewUrlParser: true, // <-- no longer necessary
  useUnifiedTopology: true // <-- no longer necessary
});

I have the same issue. Instaead

mongoose.connect(URI, {
   useCreatendex: true, 
   useFindAndModify: false, 
   useNewUrlParser: true, 
   useUnifiedTopology: true 
}, err => {
   if(err) throw err;
   console.log('Connected to MongoDB!!!')
})

try this:

mongoose.connect(URI,
    err => {
        if(err) throw err;
        console.log('connected to MongoDB')
    });

The error is because of the new version of the mongoose i.e version 6.0.6.

As the documentation says:

> No More Deprecation Warning Options > > useNewUrlParser, useUnifiedTopology, useFindAndModify, and useCreateIndex are no longer supported options. Mongoose 6 always behaves as if useNewUrlParser, useUnifiedTopology, and useCreateIndex are true, and useFindAndModify is false. Please remove these options from your code.

Also, there are some major changes in the new version.

For more info visit https://mongoosejs.com/docs/migrating_to_6.html#no-more-deprecation-warning-options

import mongoose from 'mongoose';
    
    const db = process.env.MONGOURI;
    
    const connectDB = async () => {
      try {
        console.log(db);
        await mongoose.connect(`${db}`, {
          useNewUrlParser: true,
          useUnifiedTopology: true,
        });
        console.log('MongoDB connected');
      } catch (error) {
        console.log(error.message);
        process.exit(1);
      }
    };
    
    
    export default connectDB;

remove usecreateindex, usefindandmodify options

const URI = process.env.MONGODB_URL;

mongoose.connect(URI, {
   useNewUrlParser: true, 
   useUnifiedTopology: true 
}, err => {
   if(err) throw err;
   console.log('Connected to MongoDB!!!')
})

What version of Mongoose are you using? The useCreateIndex option has been deprecated for a while and removed as of the Mongoose 6 release per No More Deprecation Warning Options:

const URI = process.env.MONGODB_URL;

mongoose.connect(URI, {
   useFindAndModify: false, 
   useNewUrlParser: true, 
   useUnifiedTopology: true 
}, err => {
   if(err) throw err;
   console.log('Connected to MongoDB!!!')
})

When I commented useNewUrlParser and useCreateIndex it worked for me.

Mongoose.connect(
    DB_URL,
    async(err)=>{
        if(err) throw err;
        console.log("conncted to db")
    }
)

const URI = process.env.MONGODB_URL;

mongoose.connect(URI, {
   //useCreatendex: true, 
   //useFindAndModify: false, 
   useNewUrlParser: true, 
   useUnifiedTopology: true 
}, err => {
   if(err) throw err;
   console.log('Connected to MongoDB!!!')
}) 

//this is working for me at date/version (08-2021

const mongoose = require('mongoose');
var url = "mongodb+srv://username:<password>@cluster0.accdl.mongodb.net/website? 
retryWrites=true&w=majority";
mongoose.connect(url, function(err, db) {
    if (err) throw err;
        console.log("Database created!");
        db.close();
});

Use this to check your database connection:

const mongoose = require("mongoose");
const url = ... /* path of your db */;

//to connect or create our database
mongoose.connect(url, { useUnifiedTopology : true, useNewUrlParser : true , }).then(() => {
   console.log("Connection successfull");
}).catch((e) => console.log("No connection"))

const URI = process.env.MONGODB_URL;
mongoose.connect(URI, { useUnifiedTopology: true } 
);

const connection = mongoose.connection;
connection.once('open', () => {
    console.log("MongoDB database connection established successfully");
} )

I faced the same error. Just remove the "useCreateIndex: true" and it will work but make sure the mongoDB service is running on your local machine in the first place ~ brew services start [email protected] :) #HappyCoding

useNewUrlParser, useUnifiedTopology, useFindAndModify, and useCreateIndex are no longer supported options.

basically, just remove that object and you'll be fine:)

October 27th 2021 Without a try catch it won't work. I am just posting this to keep everyone up to date with mongo connections.

    const uri = process.env.ATLAS_CONNECTION;
    mongoose.connect(uri, { useNewUrlParser: true, useUnifiedTopology: 
    true });

    const connection = mongoose.connection;


    try{
    connection.once('open', () => {
        console.log("MongoDB database connection established 
     successfully");
    })
    } catch(e) {
    console.log(e);
    }

   function close_connection() {
    connection.close();
   }

Connection Established