Method: Spree::TaxRate.match

Defined in:
app/models/spree/tax_rate.rb

.match(order_tax_zone) ⇒ Object

Gets the array of TaxRates appropriate for the specified order



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# File 'app/models/spree/tax_rate.rb', line 30

def self.match(order_tax_zone)
  return [] unless order_tax_zone
  rates = includes(zone: { zone_members: :zoneable }).load.select do |rate|
    # Why "potentially"?
    # Go see the documentation for that method.
    rate.potentially_applicable?(order_tax_zone)
  end

  # Imagine with me this scenario:
  # You are living in Spain and you have a store which ships to France.
  # Spain is therefore your default tax rate.
  # When you ship to Spain, you want the Spanish rate to apply.
  # When you ship to France, you want the French rate to apply.
  #
  # Normally, Spree would notice that you have two potentially applicable
  # tax rates for one particular item.
  # When you ship to Spain, only the Spanish one will apply.
  # When you ship to France, you'll see a Spanish refund AND a French tax.
  # This little bit of code at the end stops the Spanish refund from appearing.
  #
  # For further discussion, see #4397 and #4327.
  rates.delete_if do |rate|
    rate.included_in_price? &&
    (rates - [rate]).map(&:tax_category).include?(rate.tax_category)
  end
end