django/tests/generic_inline_admin/admin.py

from django.contrib import admin
from django.contrib.contenttypes.admin import GenericTabularInline

from .models import (
    Category, Contact, Episode, EpisodePermanent, Media, PhoneNumber,
)

site = admin.AdminSite(name="admin")


class MediaInline(GenericTabularInline):
    model = Media


class EpisodeAdmin(admin.ModelAdmin):
    inlines = [
        MediaInline,
    ]


class PhoneNumberInline(GenericTabularInline):
    model = PhoneNumber


class MediaPermanentInline(GenericTabularInline):
    model = Media
    can_delete = False


site.register(Episode, EpisodeAdmin)
site.register(Contact, inlines=[PhoneNumberInline])
site.register(Category)
site.register(EpisodePermanent, inlines=[MediaPermanentInline])