如何在Django中获取只属于某个国家的城市名称？

# models.py
from django.db import models

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

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

# views.py 或其他适当的地方
from django.shortcuts import render
from .models import City, Country

def cities_in_country(request, country_name):
    # 首先获取国家对象
    country = Country.objects.get(name=country_name)
    
    # 然后获取该国家的所有城市
    cities = City.objects.filter(country=country)
    
    # 提取城市名称
    city_names = [city.name for city in cities]
    
    return render(request, 'cities.html', {'city_names': city_names})

try:
    country = Country.objects.get(name=country_name)
    cities = City.objects.filter(country=country)
    city_names = [city.name for city in cities]
except Country.DoesNotExist:
    city_names = []