added a test to check for DummyCache when using CacheRosettaStorage, …

…which could explain issues #51 and #56

rosetta/__init__.py

@@ -1,4 +1,4 @@
-VERSION = (0, 6, 8)
+VERSION = (0, 7, 0)
 
 
 def get_version(svn=False, limit=3):

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:

testproject/settings.py

@@ -17,6 +17,17 @@
     }
 }
 
+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"