get_absolute_url in Django? When and why to use it?
get_absolute_url are concerned with allowing you to reverse the URL for a particular object and should be used together. They are used anytime you need to provide a link to a particular object or want to display that object's specific URL (if it has one) to the user.
You could simply write your get_absolute_url method to return a hard coded string, but this wouldn't adhere to Django's philosophy of DRY (don't repeat yourself). Instead, there is the
@permalink to make things more flexible.
class BlogPost(models.Model): name = modelsCharField() slug = models.SlugField(...) @permalink def get_absolute_url(self): return ("blog-detail", [self.slug,])
and in urls.py you may add
url(r'/blog/(?P<slug>[-w]+)/$', blog.views.blog_detail, name="blog-detail")
Django documentation discouraged use of the permalink decorator and encouraged use of
reverse() in the body of the
get_absolute_url method by 2013. The
permalink decorator seemed to have vanished without a trace from the Django documentation by 2015, and it was finally removed in Django version 2.1
So, for a standard DRY way to create a permanent link to a single object view, use
get_absolute_url() in your model like this:
class MyModel(models.Model): slug = models.SlugField() def get_absolute_url(self): return reverse('mymodel_detail', args=(self.slug,))
and then have an entry in urls.py that points to your view:
url(r'^(?P<slug>[-\w\d\_]+)/$', MyModelDetailView.as_view(), name='mymodel_detail'),
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