From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Wed, 25 Aug 2010 15:00:35 +0000 (-0400)
Subject: add a note
X-Git-Tag: rel_0_6_4~33
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e104dfff86f03b440e4fe1f48022d2d4ac18ebce;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

add a note
---

diff --git a/examples/beaker_caching/caching_query.py b/examples/beaker_caching/caching_query.py
index 0b2238282d..a94eea6ac2 100644
--- a/examples/beaker_caching/caching_query.py
+++ b/examples/beaker_caching/caching_query.py
@@ -62,6 +62,14 @@ class CachingQuery(Query):
         """override __iter__ to pull results from Beaker
            if particular attributes have been configured.
            
+           Note that this approach does *not* detach the loaded objects from
+           the current session. If the cache backend is an in-process cache
+           (like "memory") and lives beyond the scope of the current session's
+           transaction, those objects may be expired. The method here can be
+           modified to first expunge() each loaded item from the current
+           session before returning the list of items, so that the items
+           in the cache are not the same ones in the current Session.
+           
         """
         if hasattr(self, '_cache_parameters'):
             return self.get_value(createfunc=lambda: list(Query.__iter__(self)))