I have a fairly straight forward table, and a fairly easy db query:
db(db.segment.parent == request.vars.id).select()
For my use case, this returns a Rows object of 3 to 10 Row objects, and I
do some simple calculations.
for row in rows:
if row.x:
term1 = row.term
if row.y:
term2 = row.term
return dict(rows=rows, mycalc = calc(term1,term2))
(ok, x is really "isstart" and y is "isstop", flags to mark endpoints, but
that's being overly specific)
I'd also like to compute a delta between the row.term value of each row and
it's predecessor (by data entry convention, the table is ordered by id).
So the 2 questions are:
- can you tell the index in rows of the row you are working on? (I
guess this is a Python question, not just web2py). In js, the map and
reduce functions know the index in the array they have as input; is
something similar available in a Python iteration?
- can you add fields to a Row object, or to the parent Rows object, and
have the view display it, or is a virtual field definition needed?
Thanks.
Dave S
/dps
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