serializers.serialize

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)  #1.这里呼应下面获取（姓，名）

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):  #2.这里直接写的函数查natural_key时候用的
        return (self.first_name, self.last_name)

    class Meta:
        unique_together = (('first_name', 'last_name'),)

 serializers.serialize('json', [book1, book2], indent=2, use_natural_keys=True) #这里调用的是1