Ok, so the problem might be because the first test fails while doing
Session.clear():
Traceback (most recent call last):
File ".../tests/__init__.py", line 35, in tearDown
Session.clear()
File "/usr/lib/python2.5/site-packages/SQLAlchemy-0.4.6-py2.5.egg/
sqlalchemy/orm/scoping.py", line 98, in do
return getattr(self.registry(), name)(*args, **kwargs)
File "/usr/lib/python2.5/site-packages/SQLAlchemy-0.4.6-py2.5.egg/
sqlalchemy/orm/session.py", line 668, in clear
self._unattach(instance)
File "/usr/lib/python2.5/site-packages/SQLAlchemy-0.4.6-py2.5.egg/
sqlalchemy/orm/session.py", line 1141, in _unattach
if instance._sa_session_id == self.hash_key:
AttributeError: 'User' object has no attribute '_sa_session_id'
The background for this situation is in the first post of this thread:
create_instance simply returns User() object. However, if instead of
that I return EXT_CONTINUE - everything works fine. So maybe there's
something missing in my create_instance definition?
On 4 Rugp, 18:11, Michael Bayer <[EMAIL PROTECTED]> wrote:
> On Aug 4, 2008, at 4:29 AM, naktinis wrote:
>
>
>
> > User.__init__() only contains attribute assignments like:
> > def __init__(self, **kw):
> > self.name = kw.get('name', u'')
> > ...
> > self.email = kw.get('email', u'')
>
> > Nothing more. What details would be more helpful?
>
> something else is going on. you'd have to provide us with a complete
> test case which reproduces the issue.
>
>
>
> > On 2 Rugp, 20:35, Michael Bayer <[EMAIL PROTECTED]> wrote:
> >> On Aug 2, 7:46 am, naktinis <[EMAIL PROTECTED]> wrote:
>
> >>> Hi,
> >>> I have created an ExtensionMapper:
>
> >>> class UserMapperExtension(MapperExtension):
> >>> defcreate_instance(self, mapper, selectcontext, row, class_):
> >>> return User()
>
> >>> Session.mapper(User, user_table, extension=UserMapperExtension())
>
> >>> At first everything seemed to work fine, but when I runned my unit
> >>> tests (nosetests) I get errors (if I turn off the extension they are
> >>> gone). After every:
> >>> super(UserTestCase, self).setUp()
> >>> Session.flush()
>
> >>> I get:
> >>> ConcurrentModificationError: Updated rowcount 0 does not match
> >>> number
> >>> of objects updated 1
>
> >>> Or sometimes:
> >>> IntegrityError: (IntegrityError) (1452, 'Cannot add or update a
> >>> child
> >>> row: a foreign key constraint fails ... CONSTRAINT
> >>> 'some_constraint'
> >>> FOREIGN KEY (`user_id`) REFERENCES `user` (`id`))') u'UPDATE other
> >>> SET
> >>> user_id=%s WHERE other.id = %s'
>
> >>> which were not present before adding the ExtensionMapper.
>
> >>> What could be the problem?
>
> >> what kind of behavior fires off in User.__init__() ? other than
> >> that
> >> you'd have to provide a more concrete example.
>
>
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