openstack/deb-python-sqlalchemy-utils
Code Issues Proposed changes

Added support for backrefs using sqlalchemy.orm.backref which returns a tuple.

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This commit is contained in:
Tom Kedem
2016-07-23 23:19:22 +03:00
parent ae0f1e4eed
commit d5c7bb7582
1 changed files with 3 additions and 1 deletions
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4
sqlalchemy_utils/listeners.py
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@@ -227,6 +227,8 @@ def auto_delete_orphans(attr):
'The relationship argument given for auto_delete_orphans needs to ' 'The relationship argument given for auto_delete_orphans needs to '
'have a backref relationship set.' 'have a backref relationship set.'
) )
if isinstance(backref, tuple):
backref = backref[0]
@sa.event.listens_for(sa.orm.Session, 'after_flush') @sa.event.listens_for(sa.orm.Session, 'after_flush')
def delete_orphan_listener(session, ctx): def delete_orphan_listener(session, ctx):
@@ -249,7 +251,7 @@ def auto_delete_orphans(attr):
( (
session.query(target_class) session.query(target_class)
.filter( .filter(
~getattr(target_class, attr.property.backref).any() ~getattr(target_class, backref).any()
) )
.delete(synchronize_session=False) .delete(synchronize_session=False)
) )