Method: LineItem#applicable_tax_rate

Defined in:
lib/forge/app/models/line_item.rb

#applicable_tax_rate(billing_address) ⇒ Object

collect all of the applicable tax rates based on where the person purchasing it is located, then enumerate through them and add up their rates



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# File 'lib/forge/app/models/line_item.rb', line 25

def applicable_tax_rate(billing_address)
  raise "billing address must be an Address" unless billing_address.kind_of? Address
  applicable_tax_rates = self.product.tax_rates.where(country_id: billing_address.country_id).to_a
  applicable_tax_rates += self.product.tax_rates.where(province_id: billing_address.province_id).to_a if billing_address.province_id
  # use uniq to ensure we don't charge tax too many times - it's possible to get overlapping rates between a country and its provinces
  applicable_tax_rates.uniq.inject(0.0) { |sum, applicable_tax_rate| sum += applicable_tax_rate.rate }
end