Python-сообщество

class menu_objects(models.Model):
    title = models.CharField(u"Имя меню", max_length=50)
    menu_type = models.PositiveSmallIntegerField(u"Тип меню", choices=MENU_TYPE, default=SECONDARY)
    block =  models.PositiveSmallIntegerField(u"Колонка", choices=BLOCKS, default=LEFT_BAR)
    template = models.CharField(u"Шаблон", max_length=30, default="sec_menu.html")
    published = models.BooleanField(u"Опубликовать", default=True)

class menu(MPTTModel):
    title = models.CharField(u"Заголовок", max_length=50)
    parent = models.ForeignKey('self', blank=True, null=True, verbose_name="Родитель", related_name='child')
    menu_content = models.PositiveSmallIntegerField(u"Тип материала", choices=MENU_CONTENT, default=2)
    category = models.ForeignKey("Category", verbose_name=u"Категории", blank=True, null=True)
    page = models.ForeignKey(FlatPage, verbose_name=u"Страницы", blank=True, null=True)
    published = models.BooleanField(u"Опубликовать", default=True)
    position = models.IntegerField(u"Позиция в списке", default=0)
    menu_object = models.ForeignKey("menu_objects", verbose_name=u"Меню", related_name="menu_obj")

class Menu_objectsInlines(admin.TabularInline):

    model = menu
    extra = 0

    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == "parent":
            kwargs["queryset"] = menu.objects.filter(menu_object__id=1)
        return super(Menu_objectsInlines, self).formfield_for_foreignkey(db_field, request, **kwargs)

class menu_objectsAdmin(admin.ModelAdmin):
    list_display = ('title', 'menu_type', 'block', 'published')
    inlines = [Menu_objectsInlines]
admin.site.register(menu_objects, menu_objectsAdmin)

kwargs["queryset"] = menu.objects.filter(menu_object__id=1)

В admin.py:

class Menu_objectsInlines(admin.TabularInline):
    model = menu
    extra = 0
                
class menu_objectsAdmin(admin.ModelAdmin):
    list_display = ('title', 'menu_type', 'block', 'published')
    inlines = [Menu_objectsInlines]

    def change_view(self, request, object_id, extra_context=None):
          def formfield_for_foreignkey(self, db_field, request, **kwargs):
              if db_field.name == 'parent':
                  kwargs['queryset'] = menu.objects.filter(menu_object__id=object_id)
              return super(Menu_objectsInlines, self).formfield_for_foreignkey(db_field, request, **kwargs)

          Menu_objectsInlines.formfield_for_foreignkey = formfield_for_foreignkey

          self.inline_instances = [Menu_objectsInlines(self.model, self.admin_site)]

          return super(menu_objectsAdmin, self).change_view(request, object_id,
              extra_context=extra_context)


admin.site.register(menu_objects, menu_objectsAdmin)