Automatic django admin classes generation snippet

admin.py

from django.contrib import admin
from django.apps import apps
from django.contrib.admin.sites import AlreadyRegistered


def register_all_models(models):
    for m in models:
        m_admin_name = m.__module__.replace(".","") + m.__name__ + 'Admin'
        ModelAdminClass = type(m_admin_name, (admin.ModelAdmin,), {'set_x': lambda x,y: x.y})
        ModelAdminClass.model = m
        try:
            admin.site.register(m, ModelAdminClass)
        except AlreadyRegistered:
            pass

register_all_models(apps.get_models())

you can put it to any admin.py of django project (I suppose, django >= 1.7)
All models of all apps will be in admin interface with default settings.
Useful when working on rapid prototyping, need for admin and don't have time to write models manually