рекордные счета по месяцу в рельсах
NewsFeed.count(:group=>"date_trunc('month', created_at)",:conditions=>"user_id NOT IN (?)",[exluded_ids])
Condemned Cassowary
NewsFeed.count(:group=>"date_trunc('month', created_at)",:conditions=>"user_id NOT IN (?)",[exluded_ids])