Hi!
I found a quite strange behavior. Reproduction is simple.
Setup:
selfref=Table("selfref", metadata,
Column("id",Integer, primary_key=True),
Column("id_par",Integer, ForeignKey("selfref.id"))
)
class SelfRef(object):pass
mapper(SelfRef, selfref, properties={
"children":relation(SelfRef, cascade="all")
})
Following construction is fine:
sr1 = SelfRef()
sr1.children.append(SelfRef())
but
sr1 = SelfRef().children.append(SelfRef())
will raise
Traceback (most recent call last):
File "./selfref.py", line 22, in ?
sr1 = SelfRef().children.append(SelfRef())
File "/usr/lib/python2.4/site-packages/sqlalchemy/attributes.py", line
386, in append
self.__setrecord(item)
File "/usr/lib/python2.4/site-packages/sqlalchemy/attributes.py", line
362, in __setrecord
self.attr.append_event(event, self.obj, item)
File "/usr/lib/python2.4/site-packages/sqlalchemy/attributes.py", line
261, in append_event
obj._state['modified'] = True
AttributeError: 'NoneType' object has no attribute '_state'
and that is a little bit odd because both constructions are logically
identical, right?
Tested SA versions: 0.2.8, 0.3.6
David
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