Hack Patch for 1.3.x compatibility with 1.2.x fallback

nexus_memcache/conf.py

@@ -1,3 +1,44 @@
+'''
+To avoid backend validation for custom backends, supply 'NEXUS_MEMCACHE_BACKEND'.
+Validation only occurs for 'default' entries supplied by Django 1.3.x.
+Fallback to 'CACHE_BACKEND' on Django Versions prior to 1.3.x.
+
+Currently does try to loop through found memcached backends, easier
+to just set the key described above manually however.
+
+I consider this a hack until Nexus-Memcache is able to read the entire
+CACHES dictionary (nexus_modules.py) in place of the work done up front
+here.
+'''
+
+import django
 from django.conf import settings
+from django.core import cache
+
+
+_NEXUS_MEM_KEY = 'NEXUS_MEMCACHE_BACKEND'
+
+_NEXUS_IMPORT_ERR_MSG = 'Nexus Memcached default backend improperly configured. ' + \
+                        'Try NEXUS_MEMCACHE_BACKEND in settings.py.'
+
+
+class NexusCacheImproperlyConfigured(Exception):
+    '''
+    Nexus Memcached backend declaration is somehow improperly configured.
+    Try to set NEXUS_MEMCACHE_BACKEND in settings.py manually.
+    '''
+    pass
+
+
+if float(django.get_version()) < 1.3: # For all versions prior to 1.3.x
+    BACKEND = getattr(settings, _NEXUS_MEM_KEY, settings.CACHE_BACKEND)
+else: # For all versions 1.3.x and after
+    # Does a defined default exist?
+    if not settings.CACHES.has_key(cache.DEFAULT_CACHE_ALIAS):
+        raise NexusCacheImproperlyConfigured(_NEXUS_IMPORT_ERR_MSG)
+    else: # Grab all the backends
+        backend, location, params = cache.parse_backend_conf(cache.DEFAULT_CACHE_ALIAS)
+        location_string = ';'.join(location)
+        BACKEND = ('memcached://%s/' % location_string)
+
 
-BACKEND = getattr(settings, 'NEXUS_MEMCACHE_BACKEND', settings.CACHE_BACKEND)