diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index d3317e99e..3d6e20ee9 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -172,7 +172,10 @@ class AttachmentsController < ApplicationController
           # 课堂资源、作业、毕设相关资源的权限判断
           if @file.container.is_a?(Course)
             course = @file.container
+            Rails.logger.info("@@@@@@@@@@@@######################## course_id#{course.id}")
             candown = current_user.member_of_course?(course) || @file.is_public == 1
+            Rails.logger.info("@@@@@@@@@@@@######################## public #{@file.is_public}")
+            Rails.logger.info("@@@@@@@@@@@@#########################{candown}")
           elsif @file.container.is_a?(HomeworkCommon) || @file.container.is_a?(GraduationTask) || @file.container.is_a?(GraduationTopic)
             course = @file.container&.course
             candown = current_user.member_of_course?(course)