Slug - Signals - Django

models.py

# -*- coding: utf-8 -*-
from django.db import models
from django.db.models import signals
 
from signals import create_slug
 
class Category(models.Model):
    name = models.CharField(u'nome', max_length=100)
    slug = models.SlugField(max_length=150, editable=False)

    slug_field_name = 'slug'
    slug_from = 'name'
 
    def __unicode__(self):
        return self.name
 
    class Meta:
        verbose_name = u'categoria'
        verbose_name_plural = u'categorias'
 
# Signals
signals.post_save.connect(create_slug, sender=Category)

signals.py

# -*- coding: utf-8 -*-
from django.template.defaultfilters import slugify
 
def create_slug(sender, instance, signal, *args, **kwargs):
    if instance.id and hasattr(instance, 'slug_field_name') and hasattr(instance, 'slug_from'):
        slug_name = instance.slug_field_name
        slug_from = instance.slug_from
        if not getattr(instance, slug_name, None):
            slug = '%s-' % instance.id + slugify(getattr(instance, slug_from))
            setattr(instance, slug_name, slug)
            instance.save()

Thanks, it worked well