houdini/lib/query/query_campaign_metrics.rb

# License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
module QueryCampaignMetrics

  def self.on_donations(campaign_id)
    campaign = Campaign.find(campaign_id)

    result = Psql.execute(
      Qexpr.new.select("COALESCE(COUNT(DISTINCT donations.id), 0) AS supporters_count",
                       "COALESCE(SUM(payments.gross_amount), 0) AS total_raised")
        .from("campaigns")
        .join(
          "donations", "donations.campaign_id=campaigns.id"
        )
        .join_lateral("payments", QueryDonations.get_first_payment_for_donation.parse, true)
        .where("campaigns.id IN (#{QueryCampaigns
                                       .get_campaign_and_children(campaign_id)
                                       .parse
        })")
    ).last

    return {
        'supporters_count' => result['supporters_count'],
        'total_raised'=> result['total_raised'],
        'goal_amount'=> campaign.goal_amount,
        'show_total_count'=> campaign.show_total_count,
        'show_total_raised'=> campaign.show_total_raised
    }
  end
end