diff options
| author | Mike Bayer <mike_mp@zzzcomputing.com> | 2020-03-21 17:26:24 -0400 |
|---|---|---|
| committer | Mike Bayer <mike_mp@zzzcomputing.com> | 2020-03-22 11:47:59 -0400 |
| commit | becab22dcbe9d68b0671a9246e022c9810f7e319 (patch) | |
| tree | e9dee7d56ca0509ee08ffde195eb2f0791e9f158 /lib/sqlalchemy/orm/base.py | |
| parent | a25e2e02e108551d2910171202fd91fdaeb8162c (diff) | |
| download | sqlalchemy-becab22dcbe9d68b0671a9246e022c9810f7e319.tar.gz | |
Test instance for matching class hierarchy on get_from_identity
Fixed issue where a lazyload that uses session-local "get" against a target
many-to-one relationship where an object with the correct primary key is
present, however it's an instance of a sibling class, does not correctly
return None as is the case when the lazy loader actually emits a load for
that row.
Fixes: #5210
Change-Id: I89f9946cfeba61d89a272435f76a5a082b1da30c
Diffstat (limited to 'lib/sqlalchemy/orm/base.py')
| -rw-r--r-- | lib/sqlalchemy/orm/base.py | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/base.py b/lib/sqlalchemy/orm/base.py index a31745aec..6df8acf1e 100644 --- a/lib/sqlalchemy/orm/base.py +++ b/lib/sqlalchemy/orm/base.py @@ -25,6 +25,13 @@ PASSIVE_NO_RESULT = util.symbol( """, ) +PASSIVE_CLASS_MISMATCH = util.symbol( + "PASSIVE_CLASS_MISMATCH", + """Symbol indicating that an object is locally present for a given + primary key identity but it is not of the requested class. The + return value is therefore None and no SQL should be emitted.""", +) + ATTR_WAS_SET = util.symbol( "ATTR_WAS_SET", """Symbol returned by a loader callable to indicate the |