Sample Slug Code Snippet

slug_sample.py

class Farmer(models.Model):
  #existing fields
  slug = models.SlugField(max_length=500, null=True)
  
  def __str__(self):
#     The string representation for farmers
    pass


# This can also be in the signals
@receiver(pre_save, sender=Farmer)
def pre_save_receiver(sender, instance, *args, **kwargs):
    if not instance.slug:
        instance.slug = unique_farmer_slug_generator(instance)

  
def random_string_generator(size = 10, chars = string.ascii_lowercase + string.digits):
    return ''.join(random.choice(chars) for _ in range(size))
 
def unique_farmer_slug_generator(instance, new_slug = None):
    if new_slug is not None:
        slug = new_slug
    else:
        slug = slugify(f"{instance.first_name} {instance.last_name}")
    Klass = instance.__class__
    max_length = Klass._meta.get_field('slug').max_length
    slug = slug[:max_length]
    qs_exists = Klass.objects.filter(slug = slug).exists()
     
    if qs_exists:
        new_slug = "{slug}-{randstr}".format(
            slug = slug[:max_length-5], randstr = random_string_generator(size = 10))
             
        return unique_farmer_slug_generator(instance, new_slug = new_slug)
    return slug