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class Sale < ActiveRecord::Base
has_many :products
has_many :product_categories
validates_presence_of :title, :description, :start, :end
validates_numericality_of :value
# open up everything for mass assignment
attr_protected
# Define the types of sale calculation
@@sale_types = {:fixed => "All products in this sale are set to the same price. (e.g. Sale = $5.50: Product A = $5.50, Product B = $5.50",
:percentage => "All products in this sale are reduced by a percentage of their regular price. (e.g. Sale = 10%: Product A = $20 - $20/10 = $18",
:reduction => "All products are reduced by a set price. (e.g. Sale = $3: Product A = $20 - $3 = $17"}
def self.sale_types
@@sale_types
end
# Calculate sale price based on product options and sale rules
def fixed(opts = {})
self.value
end
def percentage(opts = {})
opts[:price] - opts[:price]/value
end
def reduction(opts = {})
opts[:price] - value
end
def price(opts = {})
# Call the relevant sale calculator
# It should be enough to call this from the product with product.sale.price({:price => product.price})
m = self
fp = m.method(m.sale_type.intern) # 'Function' Pointer
fp.call(opts)
end
def product_ids
self.products.map { |p| p.id }
end
end
Version data entries
11 entries across 11 versions & 1 rubygems