resolve personal_file_uploader.rb

app/uploaders/personal_file_uploader.rb

@@ -20,6 +20,12 @@ class PersonalFileUploader < FileUploader
     true
   end
 
+  def object_store
+    return Store::LOCAL unless model
+
+    super
+  end
+
   # Revert-Override
   def store_dir
     store_dirs[object_store]