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authorMike Bayer <mike_mp@zzzcomputing.com>2019-12-27 15:02:31 -0500
committerMike Bayer <mike_mp@zzzcomputing.com>2019-12-30 14:07:18 -0500
commit04fbb9e63c098dd2de40b545eed210dfd93893ce (patch)
treef509e09f71c9a382b2d7934cf81262ad019df377 /lib/sqlalchemy/sql/traversals.py
parent9d4a58d35c53484a1de66396139fc34cd65f5be8 (diff)
downloadsqlalchemy-04fbb9e63c098dd2de40b545eed210dfd93893ce.tar.gz
Test for short term reference cycles and resolve as many as possible
Added test support and repaired a wide variety of unnecessary reference cycles created for short-lived objects, mostly in the area of ORM queries. Fixes: #5056 Change-Id: Ifd93856eba550483f95f9ae63d49f36ab068b85a
Diffstat (limited to 'lib/sqlalchemy/sql/traversals.py')
-rw-r--r--lib/sqlalchemy/sql/traversals.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/traversals.py b/lib/sqlalchemy/sql/traversals.py
index 84a5623d3..68a3a0749 100644
--- a/lib/sqlalchemy/sql/traversals.py
+++ b/lib/sqlalchemy/sql/traversals.py
@@ -29,6 +29,8 @@ def compare(obj1, obj2, **kw):
class HasCacheKey(object):
_cache_key_traversal = NO_CACHE
+ __slots__ = ()
+
def _gen_cache_key(self, anon_map, bindparams):
"""return an optional cache key.