I is possible to do calculations on a virtual attribute... such as
sum, or count
I tried using the same as I would on a DB column but of course that
doesn't work. ie. Pricelist.sum(:cyberguide)
I have a table with 2 fields, one with a price and the other with a
condition then have a virtual attribute which does a calculation:
def cyberguide
if condition <= 2
[price.pricehigh]
elsif condition == 3
[price.pricehigh * 0.9]
elsif condition == 4
[price.pricehigh * 0.5]
elsif condition == 5
[price.pricehigh * 0.25]
elsif condition == 6
[price.pricehigh * 0.2]
else
[price.pricehigh * 0.15]
end
end
It works perfectly for individual functions, but how would a sum the
virtual attribute?
Thanks
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