[web2py] Is 'second option' for one-many available for many-many?

[MichaelF]

Section 6.21.1 in the manual talks about an alternative syntax for 1-many 
joins, using the 'on' function. Is that technique available for many-many? 
I try this and get an error:

# In this example, Meet and Team are being connected through 
Participant_team
teamStaff = db(db.Meet.id == request.args(1)).select(
               db.Meet.ALL, db.Team.ALL,
               join = db.Team.on(
                          (db.Participant_team.Meet == db.Meet.id) &
                          (db.Participant_team.Team == db.Team.id)))

The error is: "Unknown column 'Meet.id' in 'on clause'"

I can change "db.Team.on" to "db.Participant_team.on", but I get the same 
error.

I have a lot of other JOINs that I must do, but this is the smallest 
example that shows the problem.

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