Issue with Sites system in Django

Question

I have an issue with the Sites system in Django. My problem is when running Site.objects.get_current() on some pages on initial load of the development server I get an exception saying Site matching query does not exist. however if I load the main page of the site it loads just fine then I can go back to any other page with the exception and they load fine as well.

Has anyone come across this issue before?

Thanks,

Nick

score 1 · Answer 1 · answered Sep 21 '17 at 16:11

get_current looks at the current hostname and detects whether you have a Site object with a matching domain name.

Perhaps on development you are using localhost or something similar. You need to create a Site object with the same domain name, i.e., via something like this which could be added to a migration:

if settings.DEBUG:
    development_site_domain = 'localhost'  # Or whatever yours is.
    Site.objects.create(
        name=development_site_domain, 
        domain=development_site_domain)

You must have a Site object in the database for any FQDN you access your app via. You also need to include the FQDN in your ALLOWED_HOSTS setting.

The alternative is to set SITE_ID = 1 (or any pk of an existing SITE_ID in your database). The drawback here is that your server will respond differently on local vs. on the server if you're using a dynamic SITE_ID on production.

score 0 · Answer 2 · answered May 28 '14 at 05:58

add SITE_ID = 1 to your settings.py, and run python manage.py syncdb to create corresponding tables if not exist, this will work

and then, you could login into your admin site: click Site to modify defalut example.com to yours, this used when you edit an object, It will provide a View on site button if you defined a get_absolute_url function in your models.py

Issue with Sites system in Django

2 Answers2