Hi,
On a simple inventory model I have a set of fields representing price
and quantity.
I created a method to represent the value which is just as simple as:
def value
self.price * self.quantity
end
Then I tried to add a few calculation fields to my AS.
config.columns = :description, :cost, :price, :quantity, :value
config.columns[:quantity].calculate = :sum
config.columns[:value].calculate = :sum #<<< Is this not
possible ?
If I add a sum field to my value field I get an error message:
Mysql::Error: Unknown column 'value' in 'field list': SELECT sum
(value) AS sum_value FROM `scrips`
Is it not possible to have calculation fields on virtual fields ?
And why is AS trying to fetch the virtual field from the DB and not
from the model ?
/S
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