Factory Exemplo

gistfile1.rb

#bunch.rb
Factory.define :bunch , :class  => Bunch do |f|
 f.ribbon_color {|ribbon_color|ribbon_color.association(:ribbon_color) }
 f.date "2011-01-12 22:37:49"
 f.user_id 1
 f.after_build { |f|
    f.bunch_lots << Factory.build(:bunch_lot)
 }
end
Factory.define :lot, :class => Lot do |f|
  f.production_unit_id 1
  f.name "Lote 1"
end
Factory.define :bunch_lot, :class => BunchLot do |f|
  f.bunch_amount 10
  f.lot {|lot|lot.association(:lot) }
end
Factory.define :ribbon_color, :class => RibbonColor do |f|
  f.name "Azul"
end

#harvest.rb
Factory.define :harvest , :class  => Harvest do |f|
 f.ribbon_color {|ribbon_color| RibbonColor.first}
 f.lot{|lot| Lot.first}
 f.harvest_date "2011-04-22"
 f.user_id 1
 f.bunch_amount 5
end