根据多态性过滤django admin

Question

尝试让django-polymorphic在admin中工作。我有许多继承自BaseModel的ChildModel，但点击Django管理员中的任何一个都会导致所有BaseModel对象的列表，这对我来说是无用的。我已经尝试重新定义查询集并包含list_filter作为文档（过时，我已经了解到）建议，但似乎都没有任何效果。

class BaseModelChildAdmin(PolymorphicChildModelAdmin):

    base_model = BaseModel
    show_in_index = False
    form = BaseModelForm


class ChildModelAdmin(BaseModelChildAdmin):
    exclude = ('asset_url', 'asset_file')
    base_model = ChildModel
    show_in_index = True

    def queryset(self, request):
        qs = ChildModel.objects.all()
        return qs

class BaseModelAdmin(PolymorphicParentModelAdmin):
    base_model = BaseModel
    child_models = [(ChildModel, ChildModelAdmin)]

    list_filter = (PolymorphicChildModelFilter,)