[Sqlalchemy-tickets] [sqlalchemy] #2677: after_attach event is not generated for Session.delete()

[sqlalchemy <mi...@zz...>]

#2677: after_attach event is not generated for Session.delete()
--------------------+-----------------------------------------
 Reporter:  ods     |           Owner:  zzzeek
     Type:  defect  |          Status:  new
 Priority:  medium  |       Milestone:
Component:  (none)  |        Severity:  no triage selected yet
 Keywords:          |  Progress State:  awaiting triage
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 According to documentation after_attach event should be generated for
 `add()`, `merge()`, and `delete()` calls. But the last doesn't work. Here
 is a code sample to reproduce the problem:


 {{{
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy import Column, Integer, create_engine, event
 from sqlalchemy.orm import sessionmaker, Session

 Base = declarative_base()

 class Obj(Base):
     __tablename__ = 'objs'
     id = Column(Integer, primary_key=True)

 engine = create_engine('sqlite://', echo=True)
 Base.metadata.create_all(engine)
 session = sessionmaker(bind=engine)()

 class EventHandlerIsCalled(Exception): pass

 obj = Obj()

 session.add(obj)
 session.commit()

 @event.listens_for(Session, 'after_attach')
 def after_attach(session, instance):
     raise EventHandlerIsCalled()

 try:
     session.delete(obj)
 except EventHandlerIsCalled:
     pass
 else:
     assert False, 'after_attach event is not generated'
 }}}

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Ticket URL: <http://www.sqlalchemy.org/trac/ticket/2677>
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