Django Save function for slugs

django_slug_save.py

def save(self, *args, **kwargs):
    if not self.slug:
        # Ensure uniqueness:
        slug = slugify(self.name)
        if not App.objects.filter(slug=slug).exists():
            self.slug = slug
        else:
            count = 1
            while App.objects.filter(slug=slug).exists():
                count += 1
                slug = "%s%s" % (slug, str(count))
            self.slug = slug