common.py

from unidecode import unidecode


def slugify(title):
    symbol_mapping = (
        ('ə', 'e'),
        ('ı', 'i'),
        ('ö', 'o'),
        ('ğ', 'g'),
        ('ü', 'u'),
        ('ş', 's'),
        ('ç', 'c'),
        (' ', '-'),
    )

    title_url = title.strip().lower()
    
    for before, after in symbol_mapping:
        title_url = title_url.replace(before, after)

    for symbol in title_url:
        if symbol in string.punctuation:
            title_url = title_url.replace(symbol,'-')
            
    title_url = title_url.strip('-')
    title_url_list = list(title_url)
    for i in range(len(title_url_list)):
        if title_url_list[i] == '-' and title_url_list[i+1] == '-':
            title_url_list[i] = ''
    title_url = ''.join(title_url_list)

    return unidecode(title_url)

models.py

import slugify

class Review(models.Model):
    slug = models.SlugField(max_length=255, null=True, blank=True)

    class Meta:
        verbose_name = "Review"
        verbose_name_plural = "Reviews"

    def __str__(self):
        return self.title

    def save(self, *args, **kwargs):
        super(Review, self).save(*args, **kwargs)
        self.slug = f'{slugify(self.title)}-{slugify(str(self.created_at.timestamp()))}'
        super(Review, self).save(*args, **kwargs)
        
    def get_absolute_url(self):
        return reverse_lazy("reviews:review-detail", kwargs={"slug": self.slug})

urls.py

    path('detail/<slug:slug>/', ReviewDetailView.as_view(), name="review-detail"),