## PASTED BY BUDDHI, for updates, questions and comments please send from ##
## http://kill3rb.blogspot.com/2008/03/attachementfu-file-rename-change.html ##
class Photo < ActiveRecord::Base
	#Options for has_attachment
	has_attachment	:content_type	=> :image, 
			:storage 	=> :file_system, 
			:size => 1.kilobyte .. 10.megabytes,
			:resize_to => '500>',
			:thumbnails => { :thumb => '125' },
			:path_prefix => 'public/images/product_pics',
			:processor    => 'MiniMagick'
	validates_as_attachment

	belongs_to  :product

	#Filename changing stuff, these methods resides in attachement_fu plugin files..
	#and we are just modifying them to fit our needs and putting them in our model
	#so other models will not be effected
	def full_filename(thumbnail = nil)
	  file_system_path = (thumbnail ? thumbnail_class : self).attachment_options[:path_prefix]
	  @thumb = self.thumbnail unless (@thumb = thumbnail) #checks if thumbnails info already exist
	  File.join(RAILS_ROOT, file_system_path, self.product.code, thumbnail_name_for(@thumb, self.product.code))
	end

	#Change the filenames and thumbnail suffixes
	def thumbnail_name_for(thumbnail = nil, asset = nil)
	  suffix = "_#{thumbnail}" unless thumbnail.blank?  #sets suffix by the name of the thumbnail set in has_attachment options
	  extension = filename.scan(/\.\w+$/) # extracts extension
	  return "#{asset}#{suffix}#{extension}" # change the filename to fit your needs
	end

	before_thumbnail_saved do |record, thumbnail|
	  thumbnail.product_id = record.product_id
	end

end