Не могли бы вы привести полный пример.это показывает как раньше.вот мой код
from django.contrib import admin
from pages.models import Post, Device, DeviceType, DeviceModel, Ipaddress, DeviceGroup, Location,Department,Comment
from django_admin_listfilter_dropdown.filters import DropdownFilter, RelatedDropdownFilter
class CommentInline(admin.TabularInline):
model = Comment
class IpaddressAdmin(admin.ModelAdmin):
prepopulated_fields = {'slug': ('ipaddress',)}
# model=Ipaddress
search_fields = ['ipaddress', ]
#
list_display = ('ipaddress', 'machinename', 'user', 'department','location',)
list_filter = (
('user', DropdownFilter),
('department', RelatedDropdownFilter),
('location', RelatedDropdownFilter),
)
вот скриншот