This was supposed to be in a datamigration at some point

gistfile1.txt

from tracker.models import *;

def run():
  tickets = list(PrizeTicket.objects.all())

  for ticket in tickets:
    if( PrizeTicket.objects.filter(pk=ticket.pk).exists() ):
      equivalents = list(filter(lambda x: x != ticket, PrizeTicket.objects.filter(donation=ticket.donation,prize=ticket.prize)))
      if len(equivalents) > 0:
        for x in equivalents:
          ticket.amount += x.amount;
          x.delete()
        ticket.save()
        
  bids = list(DonationBid.objects.all())

  for donationbid in bids:
    if( DonationBid.objects.filter(pk=donationbid.pk).exists() ):
      equivalents = list(filter(lambda x: x != donationbid, DonationBid.objects.filter(donation=donationbid.donation,bid=donationbid.bid)))
      if len(equivalents) > 0:
        for x in equivalents:
          donationbid.amount += x.amount;
          x.delete()
        donationbid.save()