models.py

from django.db import models
from django.utils.translation import ugettext_lazy as _
from model_controller.models import AbstractModelController
from django.contrib.auth.models import User


class AbstractTimeStampMarker(models.Model):
    created_at = models.DateTimeField(auto_now_add=True, verbose_name=_("Created at"))
    updated_at = models.DateTimeField(auto_now=True, verbose_name=_("Updated at"))

    class Meta:
        abstract = True


class AbstractModelController(AbstractTimeStampMarker):
    created_user = models.ForeignKey(User, related_name="%(class)s_created_user", verbose_name=_("Created User"))
    updated_user = models.ForeignKey(User, related_name="%(class)s_updated_user", verbose_name=_("Updated User"))

    class Meta:
        abstract = True


class ZIPCodeAddress(AbstractModelController):
    """
    Do not forget to change ZIPCodeAddressExcelSerializer too!
    Because it is beta version. Meta class does not inherited
    """
    zipcode = models.CharField(max_length=100, db_index=True, verbose_name=_('Zipcode'))
    region = models.CharField(max_length=100, verbose_name=_('Region'))
    prefecture = models.CharField(max_length=100, verbose_name=_('Prefecture'))
    city = models.CharField(max_length=100, verbose_name=_('City'), blank=True, null=True)
    town = models.CharField(max_length=100, verbose_name=_('Town'), blank=True, null=True)
    building = models.CharField(max_length=100, verbose_name=_('Building'), blank=True, null=True)

    class Meta:
        verbose_name = 'ZIPCode Address'
        verbose_name_plural = 'ZIPCode Addresses'

    def __str__(self):
        return self.zipcode


class ZIPCodeAddressManager(models.Manager):
    pass


class ZIPCodeAddressImportExport(ZIPCodeAddress):
    objects = models.Manager()

    class Meta:
        proxy = True