#@courses = @user.courses.visible.where("is_delete =?", 0).select("courses.*,(SELECT MAX(updated_at) FROM `course_activities` WHERE course_activities.course_id = courses.id) AS #{sort_name}").order("#{sort_name} #{sort_type}")
<% count = ShieldActivity.where("container_type='User' and container_id=#{user.id} and shield_type='Course' and shield_id=#{course.id}").count %>
<% count = ShieldActivity.where("container_type='User' and container_id=#{user.id} and shield_type='Course' and shield_id=#{course.id}").count %>
<% wechat_count = ShieldWechatMessage.where("container_type='User' and container_id=#{user.id} and shield_type='Course' and shield_id=#{course.id}").count %>
<% wechat_count = ShieldWechatMessage.where("container_type='User' and container_id=#{user.id} and shield_type='Course' and shield_id=#{course.id}").count %>