be more flexible when initializing the cache

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@42822 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Cache.py

@@ -51,10 +51,13 @@ def initializePortalCachingProperties(self):
   global is_cache_initialized
   global is_cache_ready
   if not is_cache_initialized:
+    portal_caches = getattr(self.getPortalObject(), 'portal_caches', None)
+    if portal_caches is None:
+      return
     # we set is_cache_initialized right now to prevent infinite loops
     is_cache_initialized = 1
     ## update cache structure from portal_caches
-    self.getPortalObject().portal_caches.updateCache()
+    portal_caches.updateCache()
     # we mark the cache as ready after initialization, because initialization
     # itself will cause cache misses that we want to ignore
     is_cache_ready = 1