Thanks again for your support.
I'm afraid to disturb you again, I promise that is the last time
(I hope ;-)))
Only two things.

1) during the definition of the plan table I receive the error:
non-keyword arg after keyword arg
To correct it I have to put primary_key=True after the ForeignKey
definition, is it correct?

The table description after it creation is:

year  | integer | not null default nextval('plan_year_seq'::regclass) 
month | integer | not null default nextval('plan_month_seq'::regclass) 
day   | integer | not null default nextval('plan_day_seq'::regclass) 
instrument_id | integer | not null 
data          | text    |

2) I'm trying to put some data on the db. But I don't understand
how to put a new instrument in the plain table.

If I do:
i=session.query(Instrument).get(1)
p=PlanEntry()
p.day=1
p.year=2006
p.month=9
p.instrument.append(i) or p.instrument.append(Instrument(i))

I raise an exception: 'str' object has no attribute 'append'

(i.name and i.instrument_id exists).

On Wed, 6 Sep 2006 15:34:50 +0000
"Arnar Birgisson" <[EMAIL PROTECTED]> wrote:

> You could do something like this:
> 
> instruments=Table('instruments', metadata,
>  Column('instrument_id', Integer, primary_key=True),
>  Column('name', String))
> 
> plan=Table('plan', metadata,
>  Column('year', Integer, primary_key=True),
>  Column('month', Integer, primary_key=True),
>  Column('day', Integer, primary_key=True),
>  Column('instrument_id', Integer, primary_key=True,
> ForeignKey('instruments.instrument_id')),
>  Column('data', String))
> 
> class PlanEntry: pass
> class Instrument: pass
> 
> mapper(Instrument, instruments)
> mapper(PlanEntry, plan, properties={
>     'instrument': relation(Instrument)
> })
> 

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