crova.rb

def kpi(campaigns)
  {
    unique_views: campaigns.sum(:unique_views),
    clicks: campaigns.sum(:clicker),
    sent: campaigns.sum(:sent),
    turnover: campaigns.sum(:turnover),
    cost: campaigns.sum(:cost),
    margin: campaigns.sum(:margin),
    active_sent: active_campaigns.sum(:sent),
    active_margin: active_campaigns.sum(:margin),
  }
end

kpi(DbCampaigns.by_month(1, year: 2016))