rails faux active record

I am trying to use faux active record (a model that has no persistence in db).

I followed this example: http://ift.tt/1JuLUKx

And I have this error:

ArgumentError in SearchController#new wrong number of arguments (2 for 1)

app/models/search.rb:32:in assign_attributes' app/models/search.rb:27:ininitialize' app/controllers/search_controller.rb:4:in new' app/controllers/search_controller.rb:4:innew'

It seems that when you call Search.new it needs the parametters but my goal is to make it an empty Search object.

Here are my model, controller, view, route:

Model

    class Search

  include ActiveModel::MassAssignmentSecurity

  TRUE_VALUES = ActiveRecord::ConnectionAdapters::Column::TRUE_VALUES

  attr_accessor :query
  attr_reader :safe_search, :results_per_page

  alias_method :safe_search?, :safe_search

  attr_accessible :query, :safe_search, :results_per_page

  RESULTS_PER_PAGE = [10, 25, 50, 100].freeze

  include ActiveModel::Conversion
  include ActiveModel::Validations

  validates :query, presence: true
  validates :results_per_page, presence: true, inclusion: { in: RESULTS_PER_PAGE }

  def persisted?
    false
  end  

  def initialize(attributes = {})
    assign_attributes(attributes)
    yield(self) if block_given?
  end

  def assign_attributes(values, options = {})
    sanitize_for_mass_assignment(values, options[:as]).each do |k, v|
      send("#{k}=", v)
    end
  end

  def results_per_page=(value)
    @results_per_page = value.to_i
  end

  def safe_search=(value)
    @safe_search = TRUE_VALUES.include?(value)
  end

end

Controller

    class SearchController < ApplicationController

  def new
    @search = Search.new
    render "search/new.html.erb"
  end

  def create
    @search = Search.new(params[:search])

    # TODO: use the @search object to perform a search.  Adding
    # a `results` method on the search object might be a good starting point.
  end

end

View: search/new.html.erb

<%= form_for @search do |f| %>

  <%= f.label :query %>
  <%= f.text_field :query %>

  <%= f.label :safe_search %>
  <%= f.check_box :safe_search  %>

  <%= f.label :results_per_page %>
  <%= f.select_box :results_per_page  %>

<%= end %>