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/student_works_score.rb

@@ -1,6 +1,6 @@
 class StudentWorksScore < ApplicationRecord
   #appeal_status: 0：正常；1：申诉中，2：撤销申诉；3：申诉成功；4：申诉被拒绝；5：申诉失效
-belongs_to :student_work
+  belongs_to :student_work
   belongs_to :user
   has_many :journals_for_messages, -> { order('created_on desc') }, as: :jour, dependent: :destroy
   has_one :student_works_scores_appeal, dependent: :destroy

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