PROSAGA码农传奇-智慧城市-在django admin中为外键创建链接列表

<div class =“post-text”itemprop =“text”>
  <P>
    幸运的是，这实际上就是这样
    <a href =“https://django-autocomplete-light.readthedocs.io/en/master/tutorial.html#filtering-results-based-on-the-value-of-other-fields-in-the-form “rel =”nofollow“>
      django-autocomplete-light的一部分
    </A>
    。
  </p>
  <P>
    您必须创建自己的表单（如果尚未完成）：
  </p>
   <pre>
    <code>
      class PersonForm(forms.ModelForm):

class Meta:
        model = Person
        fields = ('__all__')
        widgets = {
            'country': autocomplete.ModelSelect2(url='country-autocomplete'
                                                 forward=['continent']),
            'city': autocomplete.ModelSelect2(url='city-autocomplete'
                                              forward=['country']),
        }

</code>
  </pre>
  <P>
    更新自动填充功能：
  </p>
   <pre>
    <code>
      class CountryAutocomplete(autocomplete.Select2QuerySetView):
    def get_queryset(self):
        if not self.request.is_authenticated():
            return Country.objects.none()

qs = Country.objects.all()

continent = self.forwarded.get('continent', None)

if continent:
            qs = qs.filter(continent=continent)

if self.q:
            qs = qs.filter(country__istartswith=self.q)

return qs

class CityAutocomplete(autocomplete.Select2QuerySetView):
    def get_queryset(self):
        if not self.request.is_authenticated():
            return City.objects.none()

qs = City.objects.all()

country = self.forwarded.get('country', None)

if country:
            qs = qs.filter(country=country)

if self.q:
            qs = qs.filter(city__istartswith=self.q)

return qs

</code>
  </pre>
  <P>
    并在ModelAdmin中使用新表单：
  </p>
   <pre>
    <code>
      class PersonAdmin(admin.ModelAdmin):
    form = PersonForm

</code>
  </pre>
</DIV>