django admin :如何在多行内嵌中使用smart_selects

# models.py
from django.db import models
from smart_selects.db_fields import ChainedForeignKey

class Country(models.Model):
    name = models.CharField(max_length=100)

class City(models.Model):
    country = models.ForeignKey(Country, on_delete=models.CASCADE)
    name = models.CharField(max_length=100)

class Address(models.Model):
    country = models.ForeignKey(Country, on_delete=models.CASCADE)
    city = ChainedForeignKey(
        City,
        chained_field="country",
        chained_model_field="country",
        show_all=False,
        auto_choose=True,
        sort=True
    )
    street = models.CharField(max_length=100)

# admin.py
from django.contrib import admin
from .models import Country, City, Address

class AddressAdmin(admin.ModelAdmin):
    list_display = ('country', 'city', 'street')
    list_filter = ('country', 'city')

admin.site.register(Country)
admin.site.register(City)
admin.site.register(Address, AddressAdmin)