I believe this has been brought up in the past and I vaguely remember
Massimo saying that it could be easily added to web2py.
If it is then I am still very interested in it too.
Following the present example note that table admins points to table
rooms via room_id, and table rooms points to table places via
place_id:
admins --> rooms --> places
The idea is to be able to at least double index (or even better multi-
level index), so that one could display information from table places
when building requires for table admins, something like this in pseudo-
code:
db.admins.room_id.requires=
IS_IN_DB(db,'rooms.id','%(number)s / %(db.places[place_id].address)
s')
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