#Add the aggregated columns...
$tags->selectAdd('max(notice_id) as last_notice_id');
$calc = common_sql_weight('created', common_config('tag', 'dropoff'));
+ $cutoff = sprintf("notice_tag.created > '%s'",
+ common_sql_date(time() - common_config('tag', 'cutoff')));
$tags->selectAdd($calc . ' as weight');
+ $tags->whereAdd($cutoff);
$tags->groupBy('tag');
$tags->orderBy('weight DESC');