修改bug《课程讨论区老师不能给帖子置顶》

Signed-off-by: alan <547533434@qq.com>

app/models/message.rb

@@ -78,9 +78,13 @@ class Message < ActiveRecord::Base
 
 
   safe_attributes 'subject', 'content'
-  safe_attributes 'locked', 'sticky', 'board_id',
+  safe_attributes  'board_id','locked', 'sticky',
     :if => lambda {|message, user|
-      user.allowed_to?(:edit_messages, message.project)
+      if message.project
+        user.allowed_to?(:edit_messages, message.project)
+      else
+        user.allowed_to?(:edit_messages, message.course)
+      end
     }
 
   def visible?(user=User.current)
@@ -158,6 +162,7 @@ class Message < ActiveRecord::Base
   #更新用户分数     -by zjc
   def be_user_score
     #新建message且无parent的为发帖
+
     if self.parent_id.nil? && !self.board.project.nil?
       UserScore.joint(:post_message, self.author,nil,self, { message_id: self.id })
       update_memo_number(self.author,1)