[web2py] Decode field in one to many relation

[ceriox]

hi all,
i don't know how to decode the field in one to many relation

when i show "rows" i want to decode Customer_storage.Object_id whit
Storage.Model for shwo to user a table like this:
Object                  Serial number   Serial number sostituito        Garanzia
Note
ACME123            23s332
45d54                  2012/07/02         nothing

thanks for help

my db:

db.define_table('Storage',
    Field('Developer'),
    Field('Model'),
    Field('Version'),
    Field('Colour'),
    Field('Note', 'text'),
    Field
('Data_creation','datetime',default=request.now,writable=False,readable=False))

db.define_table('Customer_storage',
    Field('Object_id',db.Storage, label='Dispositivo'),
    Field('Customer_id',db.Customers,writable=False,readable=True),
    Field('Sn', label='Serial number'),
    Field('Sn_sostituito', label='Serial number se sostituito'),
    Field('Garanzia', 'date', label='Data fine garanzia'),
    Field('Note', 'text'),
    Field
('Data_creation','datetime',default=request.now,writable=False,readable=False))

my code:
def materiale():
    id_customer=request.args(0)
    rows=db(db.Customer_storage.Customer_id==id_customer).select
(orderby=db.Customer_storage.Object_id)
    db.Customer_storage.Customer_id.default=id_customer
    form=crud.create(db.Customer_storage, next=url
('materiale',id_customer))
    return dict(form=form,rows=rows)

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