From 3009ab1525991479e10da3867c8e248fe031c091 Mon Sep 17 00:00:00 2001
From: Marco Bonetti <mbonetti@gmail.com>
Date: Wed, 9 Jan 2013 15:03:01 +0100
Subject: [PATCH] added a test to check for DummyCache when using
 CacheRosettaStorage, which could explain issues #51 and #56

---
 rosetta/__init__.py     |  2 +-
 rosetta/storage.py      |  6 ++++++
 testproject/settings.py | 11 +++++++++++
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/rosetta/__init__.py b/rosetta/__init__.py
index 664a7c7..7655aad 100644
--- a/rosetta/__init__.py
+++ b/rosetta/__init__.py
@@ -1,4 +1,4 @@
-VERSION = (0, 6, 8)
+VERSION = (0, 7, 0)
 
 
 def get_version(svn=False, limit=3):
diff --git a/rosetta/storage.py b/rosetta/storage.py
index 3e52443..f29dbca 100644
--- a/rosetta/storage.py
+++ b/rosetta/storage.py
@@ -1,5 +1,7 @@
 from django.core.cache import cache
+from django.conf import settings
 from django.utils import importlib
+from django.core.exceptions import ImproperlyConfigured
 import hashlib
 import time
 
@@ -56,6 +58,10 @@ class CacheRosettaStorage(BaseRosettaStorage):
     # so we need to per-user key prefix, which we store in the session
     def __init__(self, request):
         super(CacheRosettaStorage, self).__init__(request)
+
+        if 'dummycache' in settings.CACHES['default']['BACKEND'].lower():
+            raise ImproperlyConfigured("You can't use the CacheRosettaStorage if your cache isn't correctly set up (you are use the DummyCache cache backend).")
+
         if 'rosetta_cache_storage_key_prefix' in self.request.session:
             self._key_prefix = self.request.session['rosetta_cache_storage_key_prefix']
         else:
diff --git a/testproject/settings.py b/testproject/settings.py
index 2dece69..c92095e 100644
--- a/testproject/settings.py
+++ b/testproject/settings.py
@@ -17,6 +17,17 @@ DATABASES = {
     }
 }
 
+CACHES = {
+    'default': {
+        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
+        'LOCATION': '127.0.0.1:11211',
+        'KEY_PREFIX': 'ROSETTA_TEST'
+    }
+}
+
+
+#CACHES = {'default': {'BACKEND': 'django.core.cache.backends.dummy.DummyCache'}}
+
 TEST_DATABASE_CHARSET = "utf8"
 TEST_DATABASE_COLLATION = "utf8_general_ci"