How to update rather than create if ID matches?

gistfile1.txt

# fetchs SIB Campaigns
    def fetch
      sib = Mailin.new("xxx","xxx")
      data = { "type"=>"classic", "status" => "sent", "page"=>1,"page_limit"=>1000 }
      shoots = sib.get_campaigns_v2(data)
      shoots = shoots.dig('data')
      rst = shoots.dig('campaign_records')

      # update/create
      rst.each do |row|
      shoot = Shoot.find_by_id(:id) || Shoot.new
      shoot.attributes = row
      shoot.save!
      end

      redirect_to(:action => 'index')
    end

gistfile2.txt

PG::UniqueViolation: ERROR: duplicate key value violates unique constraint "shoots_pkey" DETAIL: Key (id)=(279) already exists.