Connect to MongoDB

Create your Node.js Application

Create a file to contain your application called index.js in your node_quickstart project directory.

Copy and paste the following code into the index.js file:

const { MongoClient } = require("mongodb");
// Replace the uri string with your connection string.
const uri = "<connection string uri>";
const client = new MongoClient(uri);
async function run() {
  try {
    const database = client.db('sample_mflix');
    const movies = database.collection('movies');
    // Query for a movie that has the title 'Back to the Future'
    const query = { title: 'Back to the Future' };
    const movie = await movies.findOne(query);
    console.log(movie);
  } finally {
    // Ensures that the client will close when you finish/error
    await client.close();
  }
}
run().catch(console.dir);

Assign the Connection String

Replace the <connection string uri> placeholder with the connection string that you copied from the Create a Connection String step of this guide.

Run your Node.js Application

In your shell, run the following command to start this application:

node index.js

The output includes details of the retrieved movie document:

{
  _id: ...,
  plot: 'A young man is accidentally sent 30 years into the past...',
  genres: [ 'Adventure', 'Comedy', 'Sci-Fi' ],
  ...
  title: 'Back to the Future',
  ...
}

If you encounter an error or see no output, check whether you specified the proper connection string in the index.js file, and that you loaded the sample data.

After you complete these steps, you have a working application that uses the driver to connect to your MongoDB deployment, runs a query on the sample data, and prints out the result.

Note

If you run into issues on this step, ask for help in the MongoDB Community Forums or submit feedback by using the Rate this page tab on the right or bottom right side of this page.

Back

Create a Connection String

Next Steps