How to make slug repeat title?

Question

Django

Please tell me how to make it so that when filling in the title field, the slug is filled in by itself

class Book(models.Model):
    title = models.CharField(max_length=155, verbose_name='Название книги')
    summary = models.TextField(blank=True, verbose_name='Краткое описание')
    photo = models.ImageField(upload_to='books/%m/%d', null=True, blank=True)
    genre = models.ForeignKey(Genre, on_delete=models.CASCADE, null=True)
    author = models.ForeignKey(Author, on_delete=models.CASCADE, null=True)
    creation_date = models.DateField(blank=True, verbose_name='Дата создания')
    slag = models.SlugField(unique=True)

    def __str__(self):
        return self.title

Answer 1

from django.utils.text import slugify
class Book(models.Model):
    ...
    def save(self, *args, **kwargs):
        self.slug = slugify(self.title)
        super(Book, self).save(*args, **kwargs)

I still do this in the admin

class BooksAdmin(admin.ModelAdmin):
    ...
    prepopulated_fields = {'slug': ('title',)}
    ...
admin.site.register(Book, BooksAdmin)

The feature in the admin panel immediately automatically changes the slug when entering text in the title field

Answer 2

The answer is found quite simply, from third-party libraries to a simple solution while saving