How about just a:
cities = session.query(City).all()
for city in cities:
session.delete(city)
or
for city in session.query(City): #actually fires the query
session.delete(city)
or even (never tried that, read from the docs):
session.query(City).delete()
Alex
2010/2/26 Marcin Krol <mrk...@gmail.com>:
> Hello Michael,
>
> When I do:
>
> cities = session.query(City).all()
> session.delete(cities)
>
> I get:
>
> sqlalchemy.orm.exc.UnmappedInstanceError: Class '__builtin__.list' is not
> mapped
>
> Unless it's some sort of a problem, it would be nifty of SQLAlchemy to be
> able to add/delete in a session a list of SQA-mapped objects: from the POV
> of a noob like me just using this engine as a sort of 'black box' it would
> be rather logical.
>
> Regards,
> mk
>
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Alex
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