On Feb 14, 2009, at 6:00 AM, Max Ischenko wrote:
>
> Hi,
>
> I do a simple query and got very strange error:
>
> File '/home/max/projects/site-baseline/doupy/doupy/controllers/
> salarydb.py', line 432 in record
> c.user = s.query(WordpressUser).get(c.rec.user_id)
> File '/home/max/projects/site-baseline/py/lib/python2.5/site-packages/
> SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/query.py', line 446 in get
> key = self._only_mapper_zero("get() can only be used against a
> single mapped class.").identity_key_from_primary_key(ident)
> File '/home/max/projects/site-baseline/py/lib/python2.5/site-packages/
> SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/mapper.py', line 1048 in
> identity_key_from_primary_key
> return (self._identity_class, tuple(util.to_list(primary_key)))
> TypeError: 'NoneType' object is not iterable
>
> The stange thing is that it only occurs if there is no matching record
> in the database. If there is a user with given id it works fine. Is it
> a bug or what?
it means a row is being returned, what SQL is emitted ?
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