gistfile1.rb

class Photo < ActiveRecord::Base
  belongs_to :portfolio

  has_attached_file :image, :styles => {:full => ["440x9999>", :jpg],
                                        :medium => ["200x255#", :jpg],
                                        :large => ["440x555#", :jpg]},
                            :processors => [:cropper],
                            :storage => :cloud_files,
                            :cloudfiles_credentials => "#{RAILS_ROOT}/config/rackspace_cloudfiles.yml"

  validates_attachment_presence :image
  validate :must_not_exeed_free_allotment

  is_taggable :categories
  
  # Image cropping coords
  attr_accessor :crop_x, :crop_y, :crop_w, :crop_h

  after_update :reprocess_image, :if => :cropping?

  def cropping?
    !crop_x.blank? && !crop_y.blank? && !crop_w.blank? && !crop_h.blank?
  end
  
  # helper method used by the cropper view to get the real image geometry
  def avatar_geometry(style = :original)
   @geometry ||= {}
   @geometry[style] ||= Paperclip::Geometry.from_file avatar.path(style)
  end

  # Set passed-in order for passed-in ids.
  def self.order(ids)
    ids.each_with_index {|id, pos| find(id).update_attribute(:position, pos) }

    # When we have switched to MySQL we can use this for max performance
    # update_all(
      # ['position = FIND_IN_SET(id, ?)', ids.join(',')],
      # { :id => ids }
    # )
  end

  private
  
    def reprocess_image
      image.reprocess!
    end

    def must_not_exeed_free_allotment
      if portfolio.photos.count >= Subscription::FREE_ALLOTMENT &&
         portfolio.user.active_subscription.nil?
        errors.add_to_base("You already have #{portfolio.photos.count} photos.  To add more, please upgrade your account.")
      end
    end
end