Fix duplication issue

basetheme_bootstrap/user_preferences.py

@@ -55,10 +55,19 @@ class UserPreferencesAbstractModel(models.Model):
     def get_for_user(cls, user):
         try:
             pref = cls.objects.get(user=user)
+        except cls.MultipleObjectsReturned:
+            for p in cls.objects.filter(user=None)[1:]:
+                p.delete()
+            pref = cls.objects.get(user=user)
         except TypeError:
             return cls.get_for_user(None)
         except cls.DoesNotExist:
-            pref, _ = cls.objects.get_or_create(user=None)
+            try:
+                pref, _ = cls.objects.get_or_create(user=None)
+            except cls.MultipleObjectsReturned:
+                for p in cls.objects.filter(user=None)[1:]:
+                    p.delete()
+                pref, _ = cls.objects.get(user=None)
             if user is not None:
                 pref.pk = None
                 pref.id = None

setup.py

@@ -7,7 +7,7 @@ readme = open('README.rst').read()
 
 setup(
     name='django-basetheme-bootstrap',
-    version='0.2.26',
+    version='0.2.27',
     description='Django Basetheme Bootstrap',
     long_description=readme,
     author='Bryan Brancotte',