500问题

app/models/comment.rb

@@ -81,9 +81,11 @@ class Comment < ActiveRecord::Base
 
   # 课程成员得分（英雄榜）
   def act_as_student_score
+    if self.commented.course
       unless self.author.allowed_to?(:as_teacher, self.commented.course)
         course_member_score(self.commented.course.id, self.author_id, "NewReply")
       end
     end
+  end
 
 end

app/models/message.rb

@@ -287,6 +287,7 @@ class Message < ActiveRecord::Base
 
   # 课程成员得分（英雄榜）
   def act_as_student_score
+    if self.course
       unless  self.author.allowed_to?(:as_teacher, self.course)
         if self.parent_id.nil?
           # 发帖
@@ -298,3 +299,4 @@ class Message < ActiveRecord::Base
       end
     end
   end
+end