i = 0
current_pk_set = PredictionRecordModel.objects.filter(transaction_id__isnull=True).values_list("pk", flat=True)[:10000]
while i < 50 and current_pk_set:
    print(i)
    PredictionRecordModel.objects.filter(pk__in=current_pk_set).update(transaction_id=F('yodlee_transaction_id'))
    current_pk_set = PredictionRecordModel.objects.filter(transaction_id__isnull=True).values_list("pk", flat=True)[:10000]
    i += 1

# Post Checks
with_strs = PredictionRecordModel.objects.all().annotate(yod_as_str=Cast('yodlee_transaction_id', CharField()))
assert with_strs.filter(yod_as_str=F('transaction_id')).count() == PredictionRecordModel.objects.all().count()