So why can't you do something like this...

db.define_table('prop',
                Field('name','string'), 
                Field('price','integer'), 
               )
if not db(db.prop.id>0).count():
    db.prop.insert(name="aaa", price=10)
    db.prop.insert(name="bbb", price=15)
    db.prop.insert(name="ccc", price=20)

db.define_table('prop_val',
                Field('prop_id','reference prop'), 
                Field('val_date',length=8), 
                Field('amount','integer'), 
               )
if not db(db.prop_val.id>0).count():
    db.prop_val.insert(prop_id=1, val_date="2016-01-01", amount=1)
    db.prop_val.insert(prop_id=1, val_date="2016-01-15", amount=15)
    db.prop_val.insert(prop_id=2, val_date="2016-01-01", amount=10)
    db.prop_val.insert(prop_id=2, val_date="2016-01-20", amount=6)
    db.prop_val.insert(prop_id=3, val_date="2016-01-01", amount=29)
    db.prop_val.insert(prop_id=3, val_date="2016-01-25", amount=25)

maxdate = db.prop_val.val_date.max()
maxval = db.prop_val.amount.max()
rows = db(db.prop.id == 
db.prop_val.prop_id).select(db.prop.name,maxdate,maxval,groupby=db.prop.name)
for r in rows: print r

-- 
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
--- 
You received this message because you are subscribed to the Google Groups 
"web2py-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to web2py+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Reply via email to