django/tests/admin_widgets/widgetadmin.py

from django.contrib import admin

from . import models


class WidgetAdmin(admin.AdminSite):
    pass

class CarAdmin(admin.ModelAdmin):
    list_display = ['make', 'model', 'owner']
    list_editable = ['owner']

class CarTireAdmin(admin.ModelAdmin):
    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == "car":
            kwargs["queryset"] = models.Car.objects.filter(owner=request.user)
            return db_field.formfield(**kwargs)
        return super(CarTireAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)

class EventAdmin(admin.ModelAdmin):
    raw_id_fields = ['main_band', 'supporting_bands']


class SchoolAdmin(admin.ModelAdmin):
    filter_vertical = ('students',)
    filter_horizontal = ('alumni',)

site = WidgetAdmin(name='widget-admin')

site.register(models.User)
site.register(models.Car, CarAdmin)
site.register(models.CarTire, CarTireAdmin)

site.register(models.Member)
site.register(models.Band)
site.register(models.Event, EventAdmin)
site.register(models.Album)

site.register(models.Inventory)

site.register(models.Bee)

site.register(models.Advisor)

site.register(models.School, SchoolAdmin)