views.py 文件源码

def assign(self, request, pk):
        try:
            task = Task.objects.get(pk=pk, assignee=None)
        except Task.DoesNotExist:
            return Response(json.dumps({"message": "Already taken"}), status=status.HTTP_400_BAD_REQUEST)

        expense, created = TaskExpense.objects.get_or_create(
            task=task,
            executor_id=request.user.pk,
            money=task.money)

        if created:
            with transaction.atomic():
                request.user.update_balance(u"???? ??????", task.money, task=task)

        Task.objects.filter(pk=pk, assignee=None).update(assignee=request.user)
        return Response(json.dumps({'message': "Taken"}), status=status.HTTP_200_OK)