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Contents
require_dependency 'spree/calculator'
module Spree
class Calculator::PerItem < Calculator
preference :amount, :decimal, default: 0
preference :currency, :string, default: Spree::Config[:currency]
def self.description
Spree.t(:flat_rate_per_item)
end
def compute(object=nil)
return 0 if object.nil?
self.preferred_amount * object.line_items.reduce(0) do |sum, value|
if matching_products.blank? || matching_products.include?(value.product)
value_to_add = value.quantity
else
value_to_add = 0
end
sum + value_to_add
end
end
# Returns all products that match this calculator, but only if the calculator
# is attached to a promotion. If attached to a ShippingMethod, nil is returned.
def matching_products
# Regression check for #1596
# Calculator::PerItem can be used in two cases.
# The first is in a typical promotion, providing a discount per item of a particular item
# The second is a ShippingMethod, where it applies to an entire order
#
# Shipping methods do not have promotions attached, but promotions do
# Therefore we must check for promotions
if self.calculable.respond_to?(:promotion)
self.calculable.promotion.rules.map do |rule|
rule.respond_to?(:products) ? rule.products : []
end.flatten
end
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems