- Query.UpdateDeleteTest.test_delete_fallback fails on mysql due to subquery in DELETE; not sure how to do this exact operation in MySQL

- added query_cls keyword argument to sessionmaker(); allows user-defined Query subclasses to be generated by query().
- added @attributes.on_reconstitute decorator, MapperExtension.on_reconstitute, both receieve 'on_load' attribute event allowing
non-__init__ dependent instance initialization routines.
- push memusage to the top to avoid pointless heisenbugs
- renamed '_foostate'/'_fooclass_manager' to '_sa_instance_state'/'_sa_class_manager'
- removed legacy instance ORM state accessors
- query._get() will use _remove_newly_deleted instead of expunge() on ObjectDeleted, so that transaction rollback
restores the previous state
- removed MapperExtension.get(); replaced by a user-defined Query subclass
- removed needless **kwargs from query.get()
- removed Session.get(cls, id); this is redundant against Session.query(cls).get(id)
- removed Query.load() and Session.load(); the use case for this method has never been clear, and the same functionality is available in more explicit ways

1 files changed, 1 insertions, 9 deletions

diff --git a/examples/query_caching/query_caching.py b/examples/query_caching/query_caching.py
index fb250acca..70dc6683c 100644
--- a/examples/query_caching/query_caching.py
+++ b/examples/query_caching/query_caching.py
@@ -30,21 +30,13 @@ class CachingQuery(Query):
         else:
             return Query.__iter__(self)
 
-# currently the easiest way to get a custom Query class in the mix is just 
-# to subclass Session.  A decorated sessionmaker() would probably work too.
-class CacheableSession(Session):
-    def __init__(self, **kwargs):
-        super(CacheableSession, self).__init__(**kwargs)
-        self._query_cls = CachingQuery
-        
-        
 # example usage
 if __name__ == '__main__':
     from sqlalchemy import Column, create_engine, Integer, String
     from sqlalchemy.orm import sessionmaker
     from sqlalchemy.ext.declarative import declarative_base
     
-    Session = sessionmaker(class_=CacheableSession)
+    Session = sessionmaker(query_cls=CachingQuery)
     
     Base = declarative_base(engine=create_engine('sqlite://', echo=True))