What is @permalink and get_absolute_url in Django?

Question

What is @permalink and get_absolute_url in Django? When and why to use it?

Please a very simple example (a real practical exam

Answer 1

As of 2013, the Django documentation discouraged use of the permalink decorator and encouraged use of reverse() in the body of the get_absolute_url method. By 2015, the permalink decorator seemed to have vanished without a trace from the Django documentation, and it was finally removed in Django version 2.1 in 2018.

So, for a standard DRY way to create a permanent link to a single object view, use get_absolute_url() in your model like this:

from django.db import models
from django.urls import reverse
#  NOTE: pre Django 1.10+ this is "from django.core.urlresolvers import reverse"


class MyModel(models.Model):
    slug = models.SlugField()

    def get_absolute_url(self):
        return reverse('mymodel_detail', args=(self.slug,))

and then have an entry in urls.py that points to your view:

url(r'^(?P[-\w\d\_]+)/$',
    MyModelDetailView.as_view(),
    name='mymodel_detail'),