MONGOID

Support for Mongoid exists in Carrierwave for doing file attachments, and you may specify them to be files or S3 currently. If no :mount_on option is provided to the uploader, the filename will get stored in a field with "_filename" appended to the name of the uploader.

class User
  include Mongoid::Document
  mount_uploader :avatar, AvatarUploader #field is avatar_filename
end

Since MongoDB does not support transactions, you will want to add a hook to Cucumber that ensures the database is clean before each feature.

In features/support/hooks.rb:

Mongoid.master.collections.select do |collection|
  collection.name !~ /system/
end.each(&:drop)

If you are using the database_cleaner gem, instead just create a file called features/support/database_cleaner.rb with the content:

require 'database_cleaner'
DatabaseCleaner.strategy = :truncation
DatabaseCleaner.orm = "mongoid"
Before { DatabaseCleaner.clean }

Similar to Cucumber, Rspec's use_transactional_fixtures option will have no affect on Mongoid, so you can clean up your specs after the suite.

In spec/spec_helper.rb:

Rspec.configure do |config|
  config.after :suite do
    Mongoid.master.collections.select do |collection|
      collection.name !~ /system/
    end.each(&:drop)
  end
end

You may also do this after :each as well if you have a lot of integration spec, but note it will be slower.

If you are using the database_cleaner gem, you can instead add these lines to your RSpec configure block spec/spec_helper.rb:

Rspec.configure do |config|
  require 'database_cleaner'
  config.before(:suite) do
    DatabaseCleaner.strategy = :truncation
    DatabaseCleaner.orm = "mongoid"
  end

  config.before(:each) do
    DatabaseCleaner.clean
  end
end

In order to get Devise set up to work with Mongoid, all you will need to do is remove the ActiveRecord require and replace it with the Mongoid one.

In config/initializers/devise.rb:

# ==> ORM configuration
# Load and configure the ORM. Supports :active_record (default),
# :mongoid (bson_ext recommended) and :data_mapper (experimental).
require "devise/orm/mongoid"

The MongoDB wiki will alert you of an initializer that you need to include if you are using Passenger with smart spawning enabled. (Conservative spawning is the default.) In the case of Mongoid you will NOT need to do this as Mongoid detects if Passenger is running in this mode and will reconnect for you when a worker is forked.

No extra configuration is needed for Mongoid if you are using Unicorn with preload_app set to true. Mongoid will detect if Unicorn has forked a child worker and will reconnect to the database on the next query.