trick to load factories from subdirectories of test/factories

factory.rb

# will go three levels deep to find Factory definitions within subdirectories of test/factories

path = Rails.root.join('test/factories')
levels = 3

subdirectories = Dir[File.join(path, '*')].select {|name| File.directory?(name) }
(levels - 1).times do
  subdirectories.each do |subdirectory|
    subdirectories += Dir[File.join(subdirectory, '*')].select {|name| File.directory?(name) }
  end
end
subdirectories.each do |subdirectory|
  Dir[File.join(subdirectory, '*.rb')].sort.each do |file| 
    require file
  end
end