the latest trunk has some fixes for that error, it will be in the
next release.
as an alternative, you can manually "compile" the mapper beforehand:
usermapper.compile()
which should fix the problem. (compilation is supposed to be
automatic but its taken awhile to find all the scenarios where its
needed).
On Aug 25, 2006, at 10:36 AM, Alexandre CONRAD wrote:
> Hello,
>
> I've been following the SQLAlchemy tutorial, and I'm bumping into the
> following problem. When I do
>
> usermapper.add_property('addresses', relation(Address))
>
> I get this traceback:
>
>>>> usermapper.add_property('addresses', relation(Address))
> Traceback (most recent call last):
> File "<stdin>", line 1, in ?
> File "build/bdist.linux-x86_64/egg/sqlalchemy/orm/mapper.py", line
> 499, in add_property
> File "build/bdist.linux-x86_64/egg/sqlalchemy/orm/mapper.py", line
> 547, in _compile_property
> File "build/bdist.linux-x86_64/egg/sqlalchemy/orm/mapper.py", line
> 1148, in init
> File "build/bdist.linux-x86_64/egg/sqlalchemy/orm/properties.py",
> line 217, in do_init
> AttributeError: 'Mapper' object has no attribute 'mapped_table'
>
> Any idea what I could be doing wrong ? The only different is that I'm
> using mysql instead of sqlite.
>
> Regards,
> --
> Alexandre CONRAD - TLV FRANCE
> Research & Development
>
>
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