erubboli · August 29, 2010 13:20
diff --git a/ar_observer_pattern.rb b/ar_observer_pattern.rb
 class Currency < ActiveRecord::Base
 end

 class CurrencyObserver < ActiveRecord::Observer
   observe :currency

   def after_update(currency)
     puts "new rate for #{currency.symbol} : #{currency.rate}"
   end
 end
	class Currency < ActiveRecord::Base
	end

	class CurrencyObserver < ActiveRecord::Observer
	observe :currency

	def after_update(currency)
	puts "new rate for #{currency.symbol} : #{currency.rate}"
	end
	end