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Contents
# Base class for all promotion rules
module Spree
class PromotionRule < Spree::Base
belongs_to :promotion, class_name: 'Spree::Promotion', inverse_of: :promotion_rules
scope :of_type, ->(t) { where(type: t) }
validate :promotion, presence: true
validate :unique_per_promotion, on: :create
def self.for(promotable)
all.select { |rule| rule.applicable?(promotable) }
end
def applicable?(promotable)
raise 'applicable? should be implemented in a sub-class of Spree::PromotionRule'
end
def eligible?(promotable, options = {})
raise 'eligible? should be implemented in a sub-class of Spree::PromotionRule'
end
# This states if a promotion can be applied to the specified line item
# It is true by default, but can be overridden by promotion rules to provide conditions
def actionable?(line_item)
true
end
def eligibility_errors
@eligibility_errors ||= ActiveModel::Errors.new(self)
end
private
def unique_per_promotion
if Spree::PromotionRule.exists?(promotion_id: promotion_id, type: self.class.name)
errors[:base] << "Promotion already contains this rule type"
end
end
def eligibility_error_message(key, options = {})
Spree.t(key, Hash[scope: [:eligibility_errors, :messages]].merge(options))
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems