Django Admin实现三级联动的示例代码(省市区)

通过自定义Admin的模板文件实现省市区的三级联动.要求创建记录时,根据省>市>区的顺序

通过自定义Admin的模板文件实现省市区的三级联动.要求创建记录时,根据省>市>区的顺序选择依次显示对应数据.

修改记录时默认显示已存在的数据.

Model

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

View和url

# 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),
]

Admin

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'

这里需要写一个form将省市区这三个字段显示为单选框.

模板文件

找到django源码中的change_form.html(django/contrib/admin/templates/admin/)文件,复制到app下templates目录中.

在admin中指定自定义的模板文件 change_form_template = 'area.html'

{% block admin_change_form_document_ready %}
 <script type="text/javascript"
 id="django-admin-form-add-constants"
 src="{% static 'admin/js/change_form.js' %}"
 {% if adminform and add %}
 data-model-name="{{ opts.model_name }}"
 {% endif %}>
 </script>

 <script type="text/javascript">
 (function($) {
 $('#id_city').change(function() {
 let p_id = $('#id_province').val();
 let c_id = $('#id_city').val();
 $.get('/district/', {"p": p_id, "c": c_id }, function(a_info) {
 var area_info = $('#id_district').empty().append('<option value>' + '---------' + '</option>');
 $.each(a_info, function(i, area) {
 area_info.append('<option value="' + area + '">' + area + '</option>')
 });
 {% if change %}
 $("#id_district").find("option:contains({{ original.district }})").attr('selected', true);
 {% endif %}
 });
 });

 $('#id_province').change(function() {
 let p_id = $('#id_province').val();
 $.get('/city/', { 'p': p_id }, function(c_info) {
 var city_info = $('#id_city').empty().append('<option value>' + '---------' + '</option>');
 $.each(c_info, function(i, city) {
 city_info.append('<option value="' + city + '">' + city + '</option>')
 });
 {% if change %}
 $("#id_city").find("option:contains({{ original.city }})").attr('selected', true);
 $("#id_city").trigger("change");
 {% endif %}
 });
 });

 $.get('/province/', function(p_info) {
 var province_info = $('#id_province').empty().append('<option value>' + '---------' + '</option>');
 $.each(p_info, function(i, province) {
 province_info.append('<option value="' + province + '">' + province + '</option>')
 });
 {% if change %}
 $("#id_province").find("option:contains({{ original.province }})").attr('selected', true);
 $("#id_province").trigger("change");
 {% endif %}
 });
 })(django.jQuery);
 </script>

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

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