From 7bb708a8c3b271f74149e4e91b9bb9de23316d94 Mon Sep 17 00:00:00 2001
From: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>
Date: Thu, 16 Aug 2012 07:36:12 -0400
Subject: [PATCH] Add exception for when unable to register an App

---
 apps/app_registry/api.py        | 3 ++-
 apps/app_registry/exceptions.py | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)
 create mode 100644 apps/app_registry/exceptions.py

diff --git a/apps/app_registry/api.py b/apps/app_registry/api.py
index 84392cea56..080df824e2 100644
--- a/apps/app_registry/api.py
+++ b/apps/app_registry/api.py
@@ -4,6 +4,7 @@ from django.db import DatabaseError, transaction
 
 from .models import App
 from .links import app_registry_tool_link
+from .exceptions import UnableToRegister
 
 
 @transaction.commit_on_success
@@ -12,7 +13,7 @@ def register_app(name, label, icon=None):
         app, created = App.objects.get_or_create(name=name)
     except DatabaseError:
         transaction.rollback()
-        return None
+        raise UnableToRegister
     else:
         app.label = label
         if icon:
diff --git a/apps/app_registry/exceptions.py b/apps/app_registry/exceptions.py
new file mode 100644
index 0000000000..78fe2fce58
--- /dev/null
+++ b/apps/app_registry/exceptions.py
@@ -0,0 +1,2 @@
+class UnableToRegister(Exception):
+    pass