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13 changes: 9 additions & 4 deletions payment/views.py
Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
import os
import stripe
from django.conf import settings
from django.db import transaction
from django.utils.decorators import method_decorator

from django.http import HttpResponse
Expand Down Expand Up @@ -72,10 +73,14 @@ def post(self, request):
session = event["data"]["object"]

try:
payment = Payment.objects.get(session_id=session["id"])
payment.status = Payment.Status.PAID
payment.save(update_fields=["status"])
notify_payment_success.delay(payment.id)
with transaction.atomic():
payment = Payment.objects.select_for_update().get(
session_id=session["id"]
)
if payment.status != Payment.Status.PAID:
payment.status = Payment.Status.PAID
payment.save(update_fields=["status"])
notify_payment_success.delay(payment.id)
except Payment.DoesNotExist:
pass

Expand Down