vendor/rails/activeresource/test/setter_trap.rb

   1 class SetterTrap < ActiveSupport::BasicObject
   2   class << self
   3     def rollback_sets(obj)
   4       returning yield(setter_trap = new(obj)) do
   5         setter_trap.rollback_sets
   6       end
   7     end
   8   end
   9
  10   def initialize(obj)
  11     @cache = {}
  12     @obj = obj
  13   end
  14
  15   def respond_to?(method)
  16     @obj.respond_to?(method)
  17   end
  18
  19   def method_missing(method, *args, &proc)
  20     @cache[method] ||= @obj.send($`) if method.to_s =~ /=$/
  21     @obj.send method, *args, &proc
  22   end
  23
  24   def rollback_sets
  25     @cache.each { |k, v| @obj.send k, v }
  26   end
  27 end