附件显示不了

app/controllers/graduation_works_controller.rb

@@ -274,7 +274,7 @@ class GraduationWorksController < ApplicationController
     @is_author = @work.user_id == current_user.id
     @work_members = @task.task_type == 1 ? [] : @task.graduation_works.where.not(user_id: @work.user_id).
         where(group_id: @work.group_id).includes(:user)
-    @attachments = @work.attachments.where.not(attachtype: 7)
+    @attachments = @work.attachments.where.not(attachtype: 7).or(attachtype: nil)
   end
 
   def comment_list