gistfile1.rb

class ProductImage < ActiveRecord::Base
  belongs_to :product, :counter_cache => true
  
  has_attached_file :image, 
                    :styles => { :medium => "150x150>", :thumb => "100x100>" },
                    :convert_options => { :all => "-quality 90 -strip" },
                    :processors => Proc.new {|a| Rails.logger.info("Lambda at #{Time.now.to_f}"); a.processors },
                    :url  => "/product_images/:id/:style/:basename.:extension",
                    :path => ":rails_root/public/product_images/:id/:style/:basename.:extension"

  named_scope :by_kind, lambda {|kind| { :conditions => { :kind => kind }, :limit => 1, :order => "created_at DESC" } }

  attr_accessor :drop_shadow

  def processors
    Rails.logger.info("processors called on #{self.inspect} at #{Time.now.to_f}")
    ret = drop_shadow? ? [:drop_shadow, :thumbnail] : [:thumbnail]
    Rails.logger.info("returned #{ret.inspect}")

    return ret
  end

  def drop_shadow?
    boardize.to_i == 1
  end

end