[Sqlalchemy-tickets] Issue #3197: "named" is not accepted for attribute events (zzzeek/sqlalchemy)

[Mike B. <iss...@bi...>]

New issue 3197: "named" is not accepted for attribute events
https://bitbucket.org/zzzeek/sqlalchemy/issue/3197/named-is-not-accepted-for-attribute-events

Mike Bayer:


```
#!diff

diff --git a/lib/sqlalchemy/orm/events.py b/lib/sqlalchemy/orm/events.py
index c50a7b0..bd0b48f 100644
--- a/lib/sqlalchemy/orm/events.py
+++ b/lib/sqlalchemy/orm/events.py
@@ -1490,7 +1490,7 @@ class AttributeEvents(event.Events):
     @classmethod
     def _listen(cls, event_key, active_history=False,
                 raw=False, retval=False,
-                propagate=False):
+                propagate=False, **kw):
 
         target, identifier, fn = \
             event_key.dispatch_target, event_key.identifier, event_key.fn
@@ -1509,14 +1509,14 @@ class AttributeEvents(event.Events):
                     return fn(target, value, *arg)
             event_key = event_key.with_wrapper(wrap)
 
-        event_key.base_listen(propagate=propagate)
+        event_key.base_listen(propagate=propagate, **kw)
 
         if propagate:
             manager = instrumentation.manager_of_class(target.class_)
 
             for mgr in manager.subclass_managers(True):
                 event_key.with_dispatch_target(
-                    mgr[target.key]).base_listen(propagate=True)
+                    mgr[target.key]).base_listen(propagate=True, **kw)
 
     def append(self, target, value, initiator):
         """Receive a collection append event.
```


```
#!python


from sqlalchemy import *
from sqlalchemy.orm import *
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import event

Base = declarative_base()

class A(Base):
    __tablename__ = 'a'

    id = Column(Integer, primary_key=True)
    bs = relationship("B")


class B(Base):
    __tablename__ = 'b'

    id = Column(Integer, primary_key=True)
    a_id = Column(Integer, ForeignKey('a.id'))

e = create_engine("sqlite://", echo=True)

sess = Session(e)


@event.listens_for(A.bs, 'set', named=True)
def update_challenge_points(target, **kw):
    pass
```