class Image < ActiveRecord::Base belongs_to :item, :polymorphic => true # belongs_to :auction_item # belongs_to :item # acts_as_list :scope => :auction_item_id # acts_as_list :scope => :item_id # file_column :image, :magick => { # :versions => { :thumb => {:crop => "1:1", :size => "150x150!", :name => "thumb"}, # :normal => {:size => "400x300>"} # } # } end