Module: ActiveRecord::Extensions::ClassMethods

Defined in:
lib/money_extensions/active_record/extensions.rb

Instance Method Summary collapse

Instance Method Details

#has_currency(*args) ⇒ Object

Assign a :currency (Money::Currency object) reader/writer for the given field name.

NOTES:

  • Currency is identified by a 3-letter ISO code,

  • Lookup is doen via Money::Currency.find(iso_code)



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# File 'lib/money_extensions/active_record/extensions.rb', line 14

def has_currency(*args)
  options = args.extract_options!
  attr_name = args.first || :currency

  field_name = "#{attr_name}_iso_code"

  composed_of attr_name, class_name: 'Money::Currency',
                         mapping: [field_name, 'iso_code'],
                         allow_nil: true,
                         constructor: proc { |value| Money::Currency.new(value) unless value.blank? }

  scope :for_currency, lambda { |currency|
                         where(currency_iso_code: currency.iso_code)
                       }

  if options[:default]
    before_validation :set_default_currency
    class_eval <<-METHOD
    def set_default_currency
      self.currency ||= EnabledCurrency.base_currency
      true
    end
    METHOD
  end

  validates_presence_of :currency_iso_code if options[:required]
end