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module Valuation
#
# Anything with a :lifetime_donations column and has_many donations can use this module.
#
module LifetimeDonations
extend ActiveSupport::Concern
#
# Includers can define a method called lifetime_donations which
# will override this method.
#
# lifetime_donations should return the donations that this model wants to include in the calculation
#
def lifetime_orders
orders
end
#
# Calculate the lifetime donations of this model by summing the price of all donations
# attached to orders attached to this person. Save the donations in lifetime_donations.
# Return the total
#
# This could be done (probably faster) in a single sql SELECT SUM suery
#
def calculate_lifetime_donations
self.lifetime_donations = 0
lifetime_orders.each do |o|
o.donations.each { |i| self.lifetime_donations = self.lifetime_donations + i.total_price}
end
save
self.lifetime_donations
end
end
end
Version data entries
28 entries across 28 versions & 1 rubygems