Django core serialize with FK.

https://docs.djangoproject.com/ko/4.2/topics/serialization/#serialization-of-natural-keys

Django

 

Look and add the code which you want to represent for FK.

 

For serialize, Add 'natural_key' function.

For deserialize, Add CustomModelManager with  'override get_by_natural_key" function

 

PS. Don't make your code messy.

Just use drf if it's possible.

#This is for serialized and json.
payload = CommentSerializer(instance).data
json_payload = JSONRenderer().render(payload)

#deserialize and get your instance
stream = io.BytesIO(payload)
data = JSONParser().parse(stream)
instance = Comment.objects.get(id=data.get("id"))

 

All I can acheive what I want.

Ref.https://www.django-rest-framework.org/api-guide/serializers/#serializing-objects