..

lib/tasks/public_message.rake

@@ -57,8 +57,8 @@ namespace :sync do
       discusses = Discuss.where("parent_id is null and dis_id=?", shixun_id)
     else
       shixun_ids = Shixun.find_by_sql("select shixun_id from stage_shixuns where stage_id in (select id from stages where
-                                     subject_id=#{subject_id}) ").map(&:shixun_id)
-      discusses = Discuss.where("parent_id is null and dis_id=?", shixun_ids)
+                                       subject_id=#{subject_id}) ").map(&:shixun_id)
+      discusses = Discuss.where("parent_id is null").where(dis_id: shixun_ids)
     end
 
     discusses.each do |discuss|