Object doesn't exist in DB after consequential api calls - python-3.x

Question

I have the following flow for object creation:
A user wants to create an object on a webservice. In order to do it - I check if the user is eligible to pay a fee for it.
We make a request to know how much the user should pay. If 0 - user will see the regular Create button, if >0 he will see the PayPal button.
User fills in data and in the second case presses the PayPal button.
We make 2 consequential API requests:
Create an object with the parameter is_draft=True. Return its id.
Create an order object and use the id from the previous step.
Sometimes we cannot create an order, because the object doesn't exist in DB yet.
Django setting:
DATABASES["default"]["ATOMIC_REQUESTS"] = True
Django models:
class Object1(models.Model):
name = models.CharField()
...
class Object2(models.Model):
name = models.CharField()
...
class Order(models.Model):
user = models.ForeignKey(User)
amount = models.DecimalField()
#naive polymorphism
object1 = models.ForeignKey(Object1)
object2 = models.ForeignKey(Object2)
# An object will be created after PayPal's call to the webhook endpoint
class OrderPayment(models.Model):
...
order = models.ForeignKey(Order)
The problem is that when I try to create an order to want to assign object1 or object2 as FK it doesn't exist yet. Also I cannot call transaction.commit() after any object creation (Object1 or Object2) because I use atomic request and it leads to an error:
django.db.transaction.TransactionManagementError: This is forbidden when an 'atomic' block is active.
How can I ensure objects existence in DB?
:::::::::::::::::::::::::::::UPDATE:::::::::::::::::::::::::::::
I am sorry, I gave a lot of irrelevant info.
Basically the flow is:
Make an API request to create an Object1. Return its id.
Behind the the API is simple CreateAPIView from DRF.
Make an API request to create an Order with the ID from previous step.
In the second step, I try to create an object and create a relation with Object1 which might not exist sometimes.
UPDATE2
views.py
class CreateObject1APIView(generics.CreateAPIView):
serializer = Object1Serializer
class CreateOrderAPIView(generics.GenericAPIView):
serializer = OrderSerializer
def post(self, request, **kwargs):
serializer = self.get_serializer(data=request.data)
serializer.is_valid(raise_exception=True)
# Everything fails after calling save method, as Object1 sometimes doesn't exist.
serializer.save()
OrderService.call()
settings.py
DATABASES = {"default": env.db("DATABASE_URL")}
DATABASES["default"]["ATOMIC_REQUESTS"] = True