According to the book,  I should be able to append 'join' statements to a 
list.  Here is what happens:

>>> joinlist = []
>>> joinlist.append( db.res.on(db.extra_dates.res_id == db.res.id) )
>>> joinlist.append( db.prop.on(db.res.prop_id == db.prop.id) )

>>> db()._select(db.prop.id, left=joinlist )

'SELECT prop.id FROM extra_dates CROSS JOIN prop LEFT JOIN res ON 
(extra_dates.res_id = res.id) LEFT JOIN prop ON (res.prop_id = prop.id) 
ORDER BY prop.id;'

This SQL is wrong and creates a ticket because an unwanted 'CROSS JOIN' has 
been added.  In my case I am using Firebird,  but I believe this is 
irrelevant because it happens in base.py which probably affects all DBs.  

I'm posting this initially here because the same problem 
<https://groups.google.com/forum/#!searchin/web2py/cross$20join%7Csort:relevance/web2py/KpxWh4ikqG8/cDBbhiK_3F8J>
 
was posted a couple of years ago.  

Maybe there's a workaround, or I'm missing something?  




-- 
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