[1.8.x] Fixed #24488 -- Made create_default_site() use default pk of 1.

Fixed create_default_site() to use a default value in case
settings.SITE_ID isn't set; refs #23945.

Backport of 818182b514d1c6b379130c440689355b4d231d49 from master

1 files changed, 1 insertions, 1 deletions

diff --git a/django/contrib/sites/management.py b/django/contrib/sites/management.py
index 5647b6a304..1f403075b8 100644
--- a/django/contrib/sites/management.py
+++ b/django/contrib/sites/management.py
@@ -25,7 +25,7 @@ def create_default_site(app_config, verbosity=2, interactive=True, using=DEFAULT
         # can also crop up outside of tests - see #15346.
         if verbosity >= 2:
             print("Creating example.com Site object")
-        Site(pk=settings.SITE_ID, domain="example.com", name="example.com").save(using=using)
+        Site(pk=getattr(settings, 'SITE_ID', 1), domain="example.com", name="example.com").save(using=using)
 
         # We set an explicit pk instead of relying on auto-incrementation,
         # so we need to reset the database sequence. See #17415.