save result of get_absolute_url in django model Field

Question

I want to save result of post.get_absolute_url() in my Django model as Field.

def get_absolute_url(self):
    return reverse('post_detail', args=[self.publish.year,
                       self.publish.month, self.publish.day, self.slug])

For example: absolute_url = models.CharField(...'result of post.get_absolute_url()'...).

Is there any way to do this? Thanks.

Answer 1

Override the models save method. This will be run every time the model is saved.

class ExampleModel(models.Model):
    absolute_url = models.CharField(max_length=255)

    def save(self, *args, **kwargs):
        self.absolute_url = self.get_absolute_url()
        super().save(*args, **kwargs)