Monkey patch for Rails 3.2 that allows Nested attribute setters to be overridden

nested_attributes_setter_can_be_overridden.rb

module ActiveRecord
  module NestedAttributes #:nodoc:
    ClassMethods.class_eval do
      def accepts_nested_attributes_for(*attr_names)
        options = { :allow_destroy => false, :update_only => false }
        options.update(attr_names.extract_options!)
        options.assert_valid_keys(:allow_destroy, :reject_if, :limit, :update_only)
        options[:reject_if] = REJECT_ALL_BLANK_PROC if options[:reject_if] == :all_blank

        attr_names.each do |association_name|
          if reflection = reflect_on_association(association_name)
            reflection.options[:autosave] = true
            add_autosave_association_callbacks(reflection)

            nested_attributes_options = self.nested_attributes_options.dup
            nested_attributes_options[association_name.to_sym] = options
            self.nested_attributes_options = nested_attributes_options

            type = (reflection.collection? ? :collection : :one_to_one)

            # def pirate_attributes=(attributes)
            #   assign_nested_attributes_for_one_to_one_association(:pirate, attributes, mass_assignment_options)
            # end
            # This is the line that changed:
            generated_feature_methods.module_eval <<-eoruby, __FILE__, __LINE__ + 1
              if method_defined?(:#{association_name}_attributes=)
                remove_method(:#{association_name}_attributes=)
              end
              def #{association_name}_attributes=(attributes)
                assign_nested_attributes_for_#{type}_association(:#{association_name}, attributes, mass_assignment_options)
              end
            eoruby
          else
            raise ArgumentError, "No association found for name `#{association_name}'. Has it been defined yet?"
          end
        end
      end
    end
  end
end