二级目录的显示调整

app/views/files/index.json.jbuilder

@@ -17,10 +17,15 @@ json.data do
       end
       # json.partial! "files/course_groups", attachment_group_settings: attachment.attachment_group_settings
       json.category_id attachment.course_second_category_id
-      if (@course_second_category_id.to_i == 0 && attachment.course_second_category.present?) || (@parent_category_id == 0 && attachment.course_second_category&.parent_id.to_i != 0)
+      if @course_second_category_id.to_i == 0 && attachment.course_second_category.present?
         json.category_name attachment.course_second_category&.name
         json.parent_category_name attachment.course_second_category&.parent&.name
       end
+
+      if @parent_category_id == 0 && attachment.course_second_category&.parent_id.to_i != 0
+        json.category_name attachment.course_second_category&.name
+        json.parent_category_name nil
+      end
     end
   end
 end