@homeworks=HomeworkCommon.where("user_id = #{@user.id} and publish_time <= '#{Date.today}' and course_id not in #{course_ids}").order("#{@order}#{@b_sort}")
@homeworks=HomeworkCommon.where("user_id = #{@user.id} and course_id not in #{course_ids}").order("#{@order}#{@b_sort}")