design.rb

class Design < ActiveRecord::Base

  has_many :comments, :dependent => :destroy
  has_many :images, :dependent => :destroy
  
  has_many :orders
  belongs_to :event
  
  named_scope :all_derbies,  { :conditions => {:derby => true} }
  named_scope :active_derbies, { :conditions => {:derby => true, :active_in_derby => true} }
  
  has_attached_file :display, :styles => { :event => "305x350>", :box => "100x100#" }
  validates_attachment_presence :display
  
  has_attached_file :printer
  validates_attachment_presence :printer
  
  before_printer_post_process :save_printer_as_file
  
  def save_printer_as_file
    false if self.printer 
  end
  
end