MongoParseError: option useCreateIndex is not supported - mongodb

Question

I tried to run the server in my MERN project but it gives me a MongoParseError.
My code is,
const mongoose = require("mongoose");
module.exports = async() => {
try {
const connectionParams = {
useNewUrlParser: true,
useCreateIndex: true,
useUnifiedTopology: true,
};
await mongoose.connect("mongodb://localhost/todo-app", connectionParams);
console.log("Connected to database.");
} catch (error) {
console.log("Could not able to connect to database.", error);
}
};
And the error message was,
Listening on port ${port}...
Could not able to connect to database. MongoParseError: option usecreateindex is not supported
How to fix this?

Answer 1

This error occurs due to the Deprecation Warning Options.
To avoid this:
Remove useCreateIndex: true,
Now run the server.
You can also try:
Remove entire const connectionParams = {....};
Remove the comma and connectionParams parameter.
Now run the server.
Your final code should look like:
const mongoose = require("mongoose");
module.exports = async() => {
try {
await mongoose.connect("mongodb://localhost/todo-app");
console.log("Connected to database.");
} catch (error) {
console.log("Could not able to connect to database.", error);
}
};
Because 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. So please remove these options from your code.
for more clarifications refer here