Non-trivial factory_girl with associations

kit.rb

Factory.define(:kit) do |f|
  f.association :primary_palette, :factory => :palette # association doesn't match class name
  f.association :secondary_palette, :factory => :palette
  f.association :user, :factory => :user
  f.sequence(:name) { |i| "Kit#{i}" }
  f.bg_images { |images| [images.association(:attachment)] } # has_many assoc
  f.default false
  f.display_fonts { [Factory(:font), Factory(:font)] }
  f.body_font { Factory(:font) }
end

Factory.define(:default_kit, :parent => :kit) do |f|
  f.sequence(:name) { |i| "default #{i}" }
  f.default true
end