Modifications in the Design code: the uploader works but the edit is broken

app/controllers/admin/designs_controller.rb

@@ -103,7 +103,6 @@ class Admin::DesignsController < ApplicationController
               temp_file.write (zip_file.read entry ).force_encoding('UTF-8')
               default_css = design.build_default_css
               default_css.file = temp_file
-              default_css.file_identifier = filename
               default_css.to_save = true
             when /\A(#{zip_name})\/(reset\.css)\z/    #for reset css
               filename = File.basename(entry.to_s)
@@ -111,7 +110,6 @@ class Admin::DesignsController < ApplicationController
               temp_file.write (zip_file.read entry ).force_encoding('UTF-8')
               reset_css = design.build_reset_css
               reset_css.file = temp_file
-              reset_css.file_identifier = filename
               reset_css.to_save = true
             when /\A(#{zip_name})\/(layout\.html)\z/    #for layout html
               filename = File.basename(entry.to_s)
@@ -135,7 +133,6 @@ class Admin::DesignsController < ApplicationController
             temp_file.write (zip_file.read entry).force_encoding('UTF-8')
             build_and_store = eval("design.#{type}").build
             build_and_store.file = temp_file
-            build_and_store.file_identifier = filename
             build_and_store.to_save = true
           end
         end