Fix previous workaround for the uploaded Design

app/models/design/design.rb

@@ -86,10 +86,14 @@ class Design
   
   def process_object(object)
     if object.to_save
-      new_object = self.send(object._type.downcase.pluralize).build
-      new_object.file = object.file
-      object.destroy
-      new_object.save
+      if object.file_filename.nil?
+        new_object = self.send(object._type.downcase.pluralize).build
+        new_object.file = object.file
+        object.destroy
+        new_object.save
+      else
+        object.save
+      end
     end
     if object.to_destroy
       object.destroy