Сортировка Ruby on Rails с Associated Model

Сортировка (:order, ORDER BY) в Ruby on Rails с использованием Associated Model.

@files = File.find(:all, :include => :label, :order => "labels.name ASC, files.name")

# files belongs_to :label
# labels has_many :files

Или даже так:

@store = Store.find(params[:id])
@files = @store.files.find(:all, :include => :label, :order => "labels.name ASC, files.name")

# files belongs_to :store
# stores has_many :files