ruby 遍历mongo数据

next_played_videos = @channel.videos.active.where(:begin_time.gt => begin_time).asc(:begin_time)
next_played_videos.each do |video|
video.begin_time = begin_time
video.end_time = video.begin_time.to_i + video.duration
begin_time = video.end_time
video.save
end

inc

next_played_videos = @channel.videos.active.where(:begin_time.gt => begin_time).asc(:begin_time)
next_played_videos.inc(begin_at: -@video.duration, end_at: -@video.duration)