Not cleaning collections in other Mongo sessions

[White-Oak]

Not sure if this is fixable, but we have a supporting rails app, that looks for its data in a main's app db.
So some models have this code:

class User
    store_in collection: 'users', session: 'main_app'
...

These collections are not cleaned by DatabseCleaner. To fix this we need to use:

  config.after(:each) do
    DatabaseCleaner[:mongoid].clean
    Mongoid.session('main_app').collections.each do |collection|
      collection.drop
    end
  end

[White-Oak]

database_cleaner 1.5.3
mongo 2.6.10