Change "_filename" to "_identifier" for carrierwave

app/controllers/admin/designs_controller.rb

@@ -46,7 +46,7 @@ class Admin::DesignsController < ApplicationController
     filename = params[:filename]
     files = @design.themes + @design.javascripts + @design.images
     file_to_removed = files.find{ |obj|
-      obj.file_filename == filename
+      obj.file_identifier == filename
     }
     type = file_to_removed._type
     new_file = ""
@@ -103,7 +103,7 @@ 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_filename = filename
+              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 +111,7 @@ 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_filename = filename
+              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 +135,7 @@ 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_filename = filename
+            build_and_store.file_identifier = filename
             build_and_store.to_save = true
           end
         end

app/controllers/admin/purchases_controller.rb

@@ -172,7 +172,7 @@ class Admin::PurchasesController < ApplicationController
   
   
   def build_file(orig_zip, zip_name, dir, object, type = nil)
-    title = object.file_filename
+    title = object.file_identifier
     temp = File.new(dir + '/' + title, 'w+')
     temp.write orig_zip.read(zip_name + '/' + (type ? (type + '/') : '') + title)
     object.file = temp