作业问答页面删除回复报错

app/controllers/commons_controller.rb

@@ -51,7 +51,8 @@ class CommonsController < ApplicationController
           200
         end
       when 'journals_for_message'
-        if current_user.course_identity(@object.jour.course)  >= Course::STUDENT && @object.user != current_user
+        course = @object.jour&.course || @object.jour&.student_work&.homework_common&.course
+        if current_user.course_identity(course)  >= Course::STUDENT && @object.user != current_user
           403
         else
           200

app/models/user.rb

@@ -346,7 +346,7 @@ class User < ApplicationRecord
     elsif business?
       Course::BUSINESS
     else
-      role = course.course_members.find_by(user_id: id, is_active: 1)&.role
+      role = course&.course_members&.find_by(user_id: id, is_active: 1)&.role
       case role
       when nil                   then Course::NORMAL
       when 'CREATOR'             then Course::CREATOR