如何在Django admin中为外键过滤器排序list_filter标签？

from django.contrib import admin
from django.utils.translation import gettext_lazy as _

class CustomFilter(admin.SimpleListFilter):
    title = _('Custom Filter')  # 过滤器的标题
    parameter_name = 'custom_filter'  # 过滤器的参数名

    def lookups(self, request, model_admin):
        # 返回过滤器的选项，格式为（过滤器值，过滤器显示名称）
        return (
            ('option1', _('Option 1')),
            ('option2', _('Option 2')),
        )

    def queryset(self, request, queryset):
        # 根据过滤器的值对查询集进行过滤
        if self.value() == 'option1':
            return queryset.filter(foreign_key_field__isnull=True)
        if self.value() == 'option2':
            return queryset.filter(foreign_key_field__isnull=False)

from django.contrib import admin
from .models import YourModel

class YourModelAdmin(admin.ModelAdmin):
    list_filter = (CustomFilter,)

admin.site.register(YourModel, YourModelAdmin)