text: import random
  import string
  from django.utils.text import slugify
  
  DONT_USE = ['create']
  def random_string_generator(size=10, chars=string.ascii_lowercase + string.digits):
      return ''.join(random.choice(chars) for _ in range(size))
  
  def unique_slug_generator(instance, new_slug=None):
  
      if new_slug is not None:
          slug = new_slug
      else:
          slug = slugify(instance.title)
      if slug in DONT_USE:
          new_slug = "{slug}-{randstr}".format(
                      slug=slug,
                      randstr=random_string_generator(size=4)
                  )
          return unique_slug_generator(instance, new_slug=new_slug)
      Klass = instance.__class__
      qs_exists = Klass.objects.filter(slug=slug).exists()
      if qs_exists:
          new_slug = "{slug}-{randstr}".format(
                      slug=slug,
                      randstr=random_string_generator(size=4)
                  )
          return unique_slug_generator(instance, new_slug=new_slug)
      return slug
  