$play_lists=$spPlaylistModel->join(" A join sh_sp_playlist_media_map B on A.id = B.playlist_id ")->field("A.id,A.`name`,A.sp_id,group_concat(B.media_id) media_ids")->group("A.id")->select();
$play_lists=$spPlaylistModel->join(" A join sh_sp_playlist_media_map B on A.id = B.playlist_id ")->field("A.id,A.`name`,A.sp_id,group_concat(B.media_id) media_ids")->group("A.id")->select();