from django.dispatch import receiver
from django.db.models.signals import post_save
from django.utils.text import slugify
from django.contrib.auth.models import User


@receiver(post_save, sender=Student)
def create_user(sender, instance, created, **kwargs):
    if created:
        msg = '{} {}'.format(instance.first_name, instance.last_name)
        password = User.objects.make_random_password()
        username = slugify(msg, allow_unicode=True) # django > 1.8
        User.objects.create(username=username, password=password)