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| author | Mike Bayer <mike_mp@zzzcomputing.com> | 2021-05-06 12:24:00 -0400 |
|---|---|---|
| committer | Mike Bayer <mike_mp@zzzcomputing.com> | 2021-05-06 13:57:43 -0400 |
| commit | 6967b4502079e199b12f5eb307d10d27ec92d537 (patch) | |
| tree | 01ac7d137bee27bfd8ec9432639115327e1fe636 /lib/sqlalchemy/sql/traversals.py | |
| parent | 900d76b8f757a8a42bfb8fc737d24a94eeeac05f (diff) | |
| download | sqlalchemy-6967b4502079e199b12f5eb307d10d27ec92d537.tar.gz | |
don't cache TypeDecorator by default
The :class:`.TypeDecorator` class will now emit a warning when used in SQL
compilation with caching unless the ``.cache_ok`` flag is set to ``True``
or ``False``. ``.cache_ok`` indicates that all the parameters passed to the
object are safe to be used as a cache key, ``False`` means they are not.
Fixes: #6436
Change-Id: Ib1bb7dc4b124e38521d615c2e2e691e4915594fb
Diffstat (limited to 'lib/sqlalchemy/sql/traversals.py')
| -rw-r--r-- | lib/sqlalchemy/sql/traversals.py | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/sqlalchemy/sql/traversals.py b/lib/sqlalchemy/sql/traversals.py index f2099f191..e8a805285 100644 --- a/lib/sqlalchemy/sql/traversals.py +++ b/lib/sqlalchemy/sql/traversals.py @@ -152,7 +152,11 @@ class HasCacheKey(object): # efficient switch construct if meth is STATIC_CACHE_KEY: - result += (attrname, obj._static_cache_key) + sck = obj._static_cache_key + if sck is NO_CACHE: + anon_map[NO_CACHE] = True + return None + result += (attrname, sck) elif meth is ANON_NAME: elements = util.preloaded.sql_elements if isinstance(obj, elements._anonymous_label): |