Course.joins(:school).where("schools.name like '%#{keyword}%' and courses.created_at between '#{start_time}' and '#{end_time}'").count
end
defshixuns_count
ShixunMember.joins("join user_extensions on user_extensions.user_id = shixun_members.user_id")
defshixuns_count(start_time,end_time,keyword)
ShixunMember.joins("join user_extensions on user_extensions.user_id = shixun_members.user_id and shixun_members.created_at between '#{start_time}' and '#{end_time}'")