How to serializer FK :)

model.py

from django.db import models

class PersonManager(models.Manager):
    def get_by_natural_key(self, first_name, last_name):
        return self.get(first_name=first_name, last_name=last_name)

class Person(models.Model):
    objects = PersonManager()

    first_name = models.CharField(max_length=100)
    last_name = models.CharField(max_length=100)

    birthdate = models.DateField()
    
    def natural_key(self):
        return (self.first_name, self.last_name)

        
class Book(models.Model):
    name = models.CharField(max_length=100)
    author = models.ForeignKey(Person)

views.py

#In views
data = serializers.serialize('json', list(Book.objects.all()), use_natural_keys=True)

#before:
{
  "pk": 1,
  "model": "store.book",
  "fields": {
    "name": "Mostly Harmless",
    "author": 42
  }
} 


# AFTER: return this wonderful JSON
{
    "pk": 1,
    "model": "store.book",
    "fields": {
        "name": "Mostly Harmless",
        "author": ["Douglas", "Adams"]
    }
}