There is no way to append an element to every list.
On Friday, 21 September 2012 19:45:12 UTC-5, Luca wrote:
>
> Suppose you have:
>
> db.define_table('membership',
> 'user_id': db.auth_user,
> 'things': 'list: reference thing'
> )
> db.define_table('thing', ...)
>
> The following does not work:
>
> db(db.membership.user_id = 2).update(things=list_add(db.membership.things,
> 3))
>
> where
>
> def list_add(l, e):
> if e in l:
> return l
> else:
> return l + [e]
>
> The problem seems to be that the db.membership.things field that is passed
> to list_add is, somehow, NOT a list.
>
>
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