Fake UserSettings objects when usersetting for the current site `Do…

…esNotExist`

usersettings/models.py

@@ -47,6 +47,30 @@ def clear_cache(self):
         USERSETTINGS_CACHE = {}
 
 
+@python_2_unicode_compatible
+class EmptyUserSetting(object):
+    """
+    This fake `UserSettings` objects will be returned by
+    the `get_current_usersettings()` if a `usersettings`
+    object `DoesNotExist` for the current site.
+    """
+
+    id = None
+    pk = None
+
+    def __init__(self):
+        pass
+
+    def __str__(self):
+        return 'User Setting not defined for current site'
+
+    def save(self, force_insert=False, force_update=False):
+        raise NotImplementedError('EmptyUserSettings cannot be saved.')
+
+    def delete(self):
+        raise NotImplementedError('EmptyUserSettings cannot be deleted.')
+
+
 class UserSettings(models.Model):
     site = models.OneToOneField(
         Site, editable=False, null=True, related_name='usersettings')
@@ -65,6 +89,12 @@ class Meta:
     def __str__(self):
         return force_text(self.site)
 
+    def get_default(self):
+        """
+        Returns the default object for usersettings.
+        """
+        return EmptyUserSetting()
+
 
 def clear_usersettings_cache(sender, **kwargs):
     """

usersettings/shortcuts.py

@@ -33,5 +33,5 @@ def get_current_usersettings():
     try:
         current_usersettings = USERSETTINGS_MODEL.objects.get_current()
     except USERSETTINGS_MODEL.DoesNotExist:
-        current_usersettings = None
+        current_usersettings = USERSETTINGS_MODEL.get_default()
     return current_usersettings