Linked table and represent

[LC LC]

Hi,

Below you can find my code and my question

my db:

db.define_table('voyageur',
   Field('Nom'),
   Field('Prenom'),
   Field('Usuel'),
..
   Field('Scolarisation'),                
   Field('Dpt')
                )
db.define_table(
    'presence',
    Field('Nom_id',db.voyageur,writable=False),
    Field('present_le',type='date'),
    Field('terrain',requires = IS_IN_DB(db, 'terrain.lieu', '%(lieu)s',zero=T('choose one')))
)

controller:

def index():
    form = SQLFORM.smartgrid(db.voyageur)
    records = SQLFORM.smartgrid(db.voyageur,linked_tables=['voyageur','presence'],user_signature=True,maxtextlength=100,deletable=True,\
                       editable=True,create=True,showbuttontext=False, paginate=200,  buttons_placement = 'left',links_placement = 'left')

When i click on "presence" i 'd like to see Non (from voyageur table) instead of Nom_id, how can i do with represent i think
thanks in advance , regards

[LC LC]

Forget it stupid question . Jus need to use representation .

Sorry