Every . b ut the last should be treated as a file system '/'

client_controlls.rb

class ClientController 
  
  dependency :assign_user, Clients::AssignUser
  
  def assign_user
    assign_user.(params[:user_id], params[:client_id])
  end
  
end

lib.application.clients.commands.assign_user.rb

module Application
  module Clients
    class AssignUser

      dependency :get_user, Application::Users::Queries::Get
      dependency :get_client, Application::Users::Queries::Get

      def call(user_id, client_id)
        user = get_user.(user_id)
        client = get_client.(client_id)

        client.admins << user
        client.save!

        client
      end

    end
  end
end

lib.application.clients.queries.get.rb

module Application
  module Clients
    module Queries
      class Get

        dependency :client, Client

        def call(id)
          client.find(id)
        end
      end
    end
  end
end

lib.application.users.queries.get.rb

module Application
  module Users
    module Queries
      class Get

        dependency :user, User

        def call(id)
          user.find(id)
        end
      end
    end
  end
end