[web2py] Key error on GAE - expects numeric

[Richard]

I am getting the following error on Google App Engine:

File "/base/data/home/apps/test/1.345469538660333403/gluon/contrib/
gql.py", line 752, in select
    new_item.append(int(item.key().id()))
TypeError: int() argument must be a string or a number, not 'NoneType'


Seems that web2py expects my keys are numeric, which is not a
requirement:
http://code.google.com/appengine/docs/python/datastore/keyclass.html#Key_id

id()

    Returns the numeric ID of the data entity, as an integer, or None
if the entity does not have a numeric ID.