admin.py

from django.contrib import admin
from django.contrib.admin import SimpleListFilter
from django.utils.translation import ugettext_lazy as _

from object_images.models import ObjectImage


class ObjectImagesListFilter(SimpleListFilter):
    title = _("object images")
    parameter_name = "images"

    def lookups(self, request, model_admin):
        return (
            ("with", _("whith images")),
            ("without", _("whitout images")),
        )

    def queryset(self, request, queryset):

        if not self.value():
            return queryset

        app_label = queryset.model._meta.app_label
        model_name = queryset.model._meta.module_name

        object_ids = ObjectImage.objects.filter(content_type__app_label=app_label,
            content_type__model=model_name).distinct().values_list("object_id", flat=True)

        if self.value() == "with":
            query_function = queryset.filter

        elif self.value() == "without":
            query_function = queryset.exclude

        return query_function(id__in=object_ids)