Something

  belongs_to :categories  @@images_path = "/home21b/sub001/sc18296-XBRN/images/"    def move(category_id)        from = @@images_path + self.category.path + self.filename      @categories = Category.find(category_id)    to = @@images_path + @categories.path        #right now we just want to see it working    return from + " => " + to   end