[web2py] How may I catch this exception

[Richard]

Hello,

I try to write a ondelete function that will try to delete a record and if 
fall on the exception : <class 'psycopg2.IntegrityError'>

Will trigger a flash message, here the code :

def ondelete_func(form):
    """try delete ondelete if database raise an error trigger a message 
telling the user that the record can't be deleted"""
    try:
        crud.delete(db[request.args(0)], request.args(1))
    except IntegrityError:
        session.flash = T('The record you try to delete is still referenced 
by other records and can\'t be deleted')
    
def create_update():
    """create update funciton"""
    #crud.settings.update_ondelete = StorageList()
    form = crud.update(db[request.args(0)], request.args(1), 
ondelete=ondelete_func)
    return dict(form=form)

I also try with : "except psycopg2.IntegrityError:"

No chance.

Thanks

Richard

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