Connect to MongoDB

Edit your Ruby application file

Navigate to your quickstart.rb file in the ruby-quickstart directory. Copy and paste the following code below the Bundler code from the Download and Install step of this tutorial. This code connects to MongoDB and queries the movies collection in the sample_mflix database.

uri = '<connection string>'
begin
  client = Mongo::Client.new(uri)
  database = client.use('sample_mflix')
  movies = database[:movies]
  # Queries for a movie that has the title 'Back to the Future'
  query = { title: 'Back to the Future' }
  movie = movies.find(query).first
  # Prints the movie document
  puts movie
ensure
  client&.close
end

Assign the connection string

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

Run your Ruby application

From your ruby-quickstart directory, run the following shell command to run the application:

ruby quickstart.rb

The command line output contains details about the retrieved movie document:

{"_id"=>BSON::ObjectId('...'), "plot"=>"A young man is accidentally sent
30 years into the past in a time-traveling DeLorean invented by his friend,
Dr. Emmett Brown, and must make sure his high-school-age parents unite
in order to save his own existence.", ...
"title"=>"Back to the Future", ...

If you encounter an error or see no output, ensure that you specified the correct connection string in the quickstart.rb file and that you loaded the sample data.