IntegrityError at /api/order/create NOT NULL constraint failed: store_order.product_id - django-rest-framework

Question

I'm trying to create Order via Api request with related keys, product and user id's. But getting an error that they cannot be null, although they're not null.
model.py
class Order(models.Model):
id = models.AutoField(primary_key=True)
product = models.ForeignKey(Product, related_name='product', on_delete=models.CASCADE, default = None)
user = models.ForeignKey(User, related_name='user', on_delete=models.CASCADE, default = None)
orderPrice = models.IntegerField(default=0)
status = models.CharField(max_length=255, default='Принят на обработку')
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
serializer.py
class OrderSerializer(serializers.ModelSerializer):
class Meta:
model = Order
fields = ['id', 'product', 'user', 'status', 'orderPrice']
depth = 1
view.py
#api_view(['POST'])
def OrderCreateView(request):
order_serializer = OrderSerializer(data=request.data)
if order_serializer.is_valid(raise_exception=True):
order_serializer.save()
return JsonResponse(order_serializer.data, safe=False)
and finally my api request
{
"product": 1,
"user": 3,
"status": "Принят на обработку",
"orderPrice": 30000
}
This code worked sometime but i did couple changes and now it getting an error. I tried to remigrate all my models, and requested like that "user_id", "product_id". But keeps getting the error

Answer 1

Hi
the problem of your code is your serializer because you mention a depth of 1 and you send a JSON in your POST functiona JSON in coherent.
Your json should contain all the attributes of your foreign keys like this:
{
"product": {
...attributes of product
},
"user": {
...attributes of user
},
"status": "Принят на обработку",
"orderPrice": 30000
}

Answer 2

You just have to declare the product field as nullable, because null is False by delfault:
class Order(models.Model):
[...]
product = models.ForeignKey(Product, on_delete=models.CASCADE, null=True, blank=True)
[...]
I also removed related_name, as to retrieve the order of a product, you had to call product.product. Now you retrieve it using product.order.