leaderboards_check.rb

def leaderboards_check(board_id, top=3, num=5)
  board = Leaderboard.find_by_id(board_id)
  return false if board.nil?
  user_ids = board.rank.members.reverse[0, top] # 排名
  user_ids.each do |uid|
    u = board.users[uid]
    unless u.nil?
      puts "#{uid}, #{u[:nickname]}, #{u[:city]}" # 推荐人
      puts '_'*88
      referring_ids = u[:referring].keys.sample(num) # 随机取下线ID
      referring = User.where(:id.in => referring_ids).only(:nickname, :mobile)
      unless referring.empty?
        referring.each do |u|
          puts "#{u.id}, #{u.nickname}, #{u.mobile}" # 手机号
        end
      end
      puts '_'*88
    end
  end
end

users_count.rb

def users_count(started_at = Date.today, ended_at = Date.today)
  started_at = started_at.to_date if started_at.is_a?(String) # 开始时间
    ended_at = ended_at.to_date   if ended_at.is_a?(String) # 结束时间
  User.between(created_at: started_at.beginning_of_day..ended_at.end_of_day ).count
end