rake

lib/tasks/publick_course.rake

@@ -12,8 +12,8 @@ namespace :public_course do
     puts "subject_id is #{subject_id}"
     puts "course_id is #{course_id}"
 
-    user_ids = Myshixun.find_by_sql("select user_id from myshixuns where shixun_id in (select shixun_id from stage_shixuns
-                                      where stage_id in (select id from stages where subject_id=#{subject_id}))").try(:user_id)
+    user_ids = Myshixun.find_by_sql("select distinct(user_id) from myshixuns where shixun_id in (select shixun_id from stage_shixuns
+                                     where stage_id in (select id from stages where subject_id=#{subject_id}))").map(&:user_id)
     puts user_ids
     if user_ids.present?
       user_ids.each do |user_id|