models.py

from __future__ import unicode_literals

from django.db import models
from django.utils import timezone
from django.contrib.auth.models import User
from django.db.models.signals import post_save, post_delete
from django.dispatch import receiver

from events.models import Event

USER_STATUS = (
    ('ACTIVE', 'ACTIVE'),
    ('DISABLED', 'DISABLED'),
)

class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    status = models.CharField(choices=USER_STATUS, default='ACTIVE', max_length=10)
    bio = models.TextField(max_length=500, blank=True)
    department = models.CharField(max_length=100, blank=True)
    created_at = models.DateTimeField(default=timezone.now)
    updated_at = models.DateTimeField(default=timezone.now)

    def __str__(self):
        return "profile_{}".format(self.user.username)

    def save(self, *args, **kwargs):
        if not self._state.adding:
            self.updated_at = timezone.now()
        super(Profile, self).save(*args, **kwargs)


    def get_group(self):
        return self


@receiver(post_save, sender=User)
def create_user_profile(sender, instance, created, **kwargs):
    if created:
        Profile.objects.create(user=instance, status='ACTIVE', bio="n/a", department="n/a")
        Event.objects.create(message="[User] New user created (id={}): {}".format(instance.id, instance),
                             type="CREATE", severity="DEBUG")

@receiver(post_save, sender=User)
def save_user_profile(sender, instance, **kwargs):
    instance.profile.save()

@receiver(post_delete, sender=User)
def delete_user_profile(sender, **kwargs):
    Event.objects.create(message="[User] User '{}' deleted (id={})".format(kwargs['instance'], kwargs['instance'].id),
                 type="DELETE", severity="DEBUG")