app/models/system_picture.rb

   1 class SystemPicture < ActiveRecord::Base
   2   def validate
   3     errors.add(:filesize, 'size over(1MB)') if self.filesize > 1000000
   4   end
   5
   6   def dext
   7     self.ext.downcase
   8   end
   9
  10   def filename
  11     "#{self.id}.#{self.dext}"
  12   end
  13
  14   def mime_type
  15     "image/#{self.dext}"
  16   end
  17
  18   def url
  19     '/system_pictures/' + filename
  20   end
  21
  22   def store(rimg)
  23     bindata = rimg.to_blob
  24     PictureIO.system_picture_io.put bindata, self.filename
  25     true
  26   end
  27
  28   def restore(subdir = nil)
  29     PictureIO.system_picture_io.get self.filename, subdir
  30   end
  31
  32 end