[ACCEPTED]-How can I get the Django admin's "View on site" link to work?-django-sites
Define a get_absolute_url on your model. The admin uses 2 that method to figure out how to construct 1 the objects url. See the docs.
Putting
'django.contrib.sites',
into your INSTALLED_APPS and a following 3
$ ./manage.py syncdb
may suffice.
When installed, edit the Site 2 instance (e.g. through /admin interface) to reflect 1 your local hostname (e.g. localhost:8000).
As communicated by others, this requires 8 a couple extra steps in addition to enabling 7 view_on_site. You have to implement get_absolute_url() in 6 your model, and enable Sites in your project 5 settings.
Set the view_on_site setting
Add view_on_site setting to admin 4 form:
class MymodelAdmin(admin.ModelAdmin):
...
view_on_site = True
...
admin.site.register(Mymodel, MymodelAdmin)
Implement get_absolute_url()
Add get_absolute_url() to your model. In models.py:
Mymodel(models.Model):
...
def get_absolute_url(self):
return "/mystuff/%i" % self.id
Enable Sites
Add 3 Sites in yourapp/settings.py:
INSTALLED_APPS = (
...
'django.contrib.sites',
...
)
Then update 2 the database:
$ python manage.py migrate
Done!
Check out reverse() for a more sophisticated 1 way to generate the path in get_absolute_url().
It seems to me that the view on site functionality 9 works only if get_absolute_url refares to a Django view. It 8 does not seem to work if you are trying 7 to create a link, which redirects to a page 6 out of Django's control (even if it is served 5 from the same domain by apache itself).
In 4 this case, it is easy to create the button 3 manually by overriding admin tempale as 2 follows:
{% extends "admin/change_form.html" %}
{% block object-tools-items %}
{{ block.super }}
<li>
<a class="viewsitelink" href="{{ original.get_absolute_url }}">View on my site, out of Django's control</a>
</li>
{% endblock %}
Also, add view_on_site = False to your ModelAdmin class, otherwise 1 both of the buttons will appear.
According to the Django documentation, and 6 as of Django 3.1 (May 2020), you have to 5 define a get_absolute_url() method in your 4 model.
One place Django uses get_absolute_url() is 3 in the admin app. If an object defines this method, the object-editing page will have a “View on site” link that will jump you directly to the object’s public view, as 2 given by get_absolute_url().
Here is an example 1 from the documentation:
def get_absolute_url(self):
from django.urls import reverse
return reverse('people.views.details', args=[str(self.id)])
Source: https://docs.djangoproject.com/en/3.1/ref/models/instances/#get-absolute-url
When you have edited either SITE_ID in settings.py 3 or a Site instance thought the admin, don't 2 forget to restart your web server for the 1 change to take effect.
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