Question

How does Django ensure the uniqueness of slugs?

Answer 1

By default, Django does not enforce the uniqueness of slugs. However, you can add the unique=True parameter to the SlugField to ensure that each slug is unique within the model. 

Here's an example:

from django.db import models

class MyModel(models.Model):
    title = models.CharField(max_length=100)
    slug = models.SlugField(unique=True)

    def save(self, *args, **kwargs):
        self.slug = self.title.replace(" ", "-").lower()
        super().save(*args, **kwargs)
 

With unique=True, Django will raise an error if you try to save an object with a duplicate slug.