Below is the code I am using to connect to mongodb.

import { MongoClient } from "mongodb"

const user = 'user_001'
const userPassword = '<password>'
const cluster = 'cluster0.1jjgj'

const url = `mongodb srv://${user}:${userPassword}@${cluster}.mongodb.net/myFirstDatabase?retryWrites=true&w=majority`

export const connectDatabase = async() => {
  
  const client = await MongoClient.connect(url, {
    useNewUrlParser: true,
    useUnifiedTopology: true
  });

  const db = client.db('main')

  return {
    listings: db.collection('test-listings')
  }
}

Tried connecting mongodb with MongoDB NodeJS Driver mongodb but following error occurs. what does MongoClientOptions (useNewUrlParser: boolean, useUnifiedTopology:boolean) do in mongodb and what could be causing this error ? please explain. Thank you.

  Overload 1 of 4, '(url: string, callback: Callback<MongoClient>): void', gave the following error.
    Argument of type '{ useNewUrlParser: boolean; useUnifiedTopology: boolean; }' is not assignable to parameter of type 'Callback<MongoClient>'.
      Object literal may only specify known properties, and 'useNewUrlParser' does not exist in type 'Callback<MongoClient>'.
  Overload 2 of 4, '(url: string, options: MongoClientOptions): Promise<MongoClient>', gave the following error.
    Argument of type '{ useNewUrlParser: boolean; useUnifiedTopology: boolean; }' is not assignable to parameter of type 'MongoClientOptions'.
      Object literal may only specify known properties, and 'useNewUrlParser' does not exist in type 'MongoClientOptions'.ts(2769)

CodePudding user response：

You should be able to connect to the client with:

export const connectDatabase = async () => {
    const client = new MongoClient(url);
    await client.connect();
    const db = client.db('main');
  
    return {
      listings: db.collection('test-listings'),
    };
  };

CodePudding user response：

This works perfectly fine, Emphasis on poolSize.

mongoose.connect(
dbUrl,
{
useNewUrlParser: true,
useCreateIndex: true,
autoIndex: true,
useUnifiedTopology: true,
poolSize: 10,
},
function (err) {
  if (err) {
    console.log(`Unable to Connect to Database. ${err.name} ${err.message}`);
    process.exit(1);
   } else {
    console.log(new Date());
    console.error("Successfully connected to Database");
   }
  }
);

for more info check https://www.mongodb.com/community/forums/t/argument-of-type-usenewurlparser-boolean-useunifiedtopology-boolean-is-not-assignable-to-parameter-of-type/119731/4