Configure Your MongoDB Connection

Configure application for MongoDB

To configure your application to use MongoDB and Mongoid as your ODM, run the following command from the root of your project:

bin/rails g mongoid:config

After the command completes successfully, your application contains the config/mongoid.yml file to configure the connection to the MongoDB deployment. Your application also includes the config/initializers/mongoid.rb file for more advanced configuration.

Specify target database in connection string

When connecting to an Atlas cluster, you must specify the database that you want to interact with as the default database in your connection string. You must add the database name to your connection string after the hostname.

The following example specifies the sample_restaurants target database in a sample connection string:

mongodb+srv://user0:pass123@mongo0.example.com/sample_restaurants

Specify connection in mongoid.yml

Paste the following configuration into the config/mongoid.yml file, making sure to replace the <connection string> placeholder with your connection string that references the target database:

development:
  clients:
    default:
      uri: <connection string>