Django Admin实现三级联动的示例代码(省市区)

class Member(models.Model):
  name = models.CharField(max_length=100, verbose_name='姓名')
  province = models.CharField(max_length=100, null=True, blank=True, verbose_name='省份')
  city = models.CharField(max_length=100, null=True, blank=True, verbose_name='城市')
  district = models.CharField(max_length=100, null=True, blank=True, verbose_name='区/县')

  class Meta:
    verbose_name_plural = verbose_name = '人员'

  def __str__(self):
    return self.name

# views
LOCATION = {'吉林省': {'长春市': ['南关区', '朝阳区', '二道区', '绿园区']}}


def choose_province(request):
  province = list(LOCATION.keys())
  return JsonResponse(province, safe=False)


def choose_city(request):
  province = request.GET.get('p')
  cities = list(LOCATION[province].keys())
  return JsonResponse(cities, safe=False)


def choose_district(request):
  province = request.GET.get('p')
  city = request.GET.get('c')
  districts = LOCATION[province][city]
  return JsonResponse(districts, safe=False)
  
# urls
from person.views import choose_province, choose_city, choose_district

urlpatterns = [
  path('province/', choose_province),
  path('city/', choose_city),
  path('district/', choose_district),
  path('admin/', admin.site.urls),
]

class MemberForm(forms.ModelForm):
  class Meta:
    widgets = {
      'province': forms.Select(),
      'city': forms.Select(),
      'district': forms.Select()
    }

@admin.register(Member)
class MemberAdmin(admin.ModelAdmin):
  form = MemberForm
  fields = ('name', ('province', 'city', 'district'))
  list_display = ('name', 'province', 'city', 'district')
  change_form_template = 'area.html'

{% block admin_change_form_document_ready %}
  <script type="text/javascript"
      id="django-admin-form-add-constants"
      src="/UploadFiles/2021-04-08/change_form.js' %}">

参考: https://www.jb51.net/article/142409.htm
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