make medium use a label as identifier

this commit uses the backends label from NOTIFICATION_BACKENDS setting
for easier to rearrange backends

Conflicts:
	notification/backends/__init__.py
	pinax/notifications/models.py

pinax/notifications/conf.py

@@ -65,8 +65,8 @@ def configure_backends(self, value):
                 raise ImproperlyConfigured(
                     "NOTIFICATION_BACKENDS does not contain enough data."
                 )
-            backend_instance = load_path_attr(backend_path)(medium_id, spam_sensitivity)
-            backends.append(((medium_id, label), backend_instance))
+            backend_instance = load_path_attr(backend_path)(label, spam_sensitivity)
+            backends.append(((label, label), backend_instance))
         return dict(backends)
 
     def configure_get_language_model(self, value):

pinax/notifications/models.py

@@ -79,7 +79,7 @@ class NoticeSetting(models.Model):
 
     user = models.ForeignKey(settings.AUTH_USER_MODEL, verbose_name=_("user"))
     notice_type = models.ForeignKey(NoticeType, verbose_name=_("notice type"))
-    medium = models.CharField(_("medium"), max_length=1, choices=NOTICE_MEDIA)
+    medium = models.CharField(_("medium"), max_length=100, choices=NOTICE_MEDIA)
     send = models.BooleanField(_("send"), default=False)
     scoping_content_type = models.ForeignKey(ContentType, null=True, blank=True)
     scoping_object_id = models.PositiveIntegerField(null=True, blank=True)

pinax/notifications/tests/__init__.py

@@ -2,5 +2,5 @@ def get_backend_id(backend_name):
     from ..models import NOTICE_MEDIA
     for bid, bname in NOTICE_MEDIA:
         if bname == backend_name:
-            return bid
+            return bname
     return None