How to extend/subclass SearchLogic::Search?

Here is what I'm trying:

app/models/product.rb

class Product < ActiveRecord::Base
  class << self
    def searchlogic(conditions = {})
      ProductSearch.new(self, scope(:find), conditions)
    end
  end
end

app/models/product_search.rb

require "se开发者_StackOverflow中文版archlogic/search"

class ProductSearch < SearchLogic::Search

  include SearchLogic

  def foobar
    puts :hello_world
  end

end

test

~/project $ script/console
>> @search = Product.searchlogic

NameError: uninitialized constant SearchLogic

What's the appropriate way to subclass or extend SearchLogic::Search?

Considering there's not very much searchlogic help here on SO, I decided not to delete this question and instead answer it myself.

The Module name is Searchlogic with a lowercase L.

Here is the correct app/models/product_search.rb

class ProductSearch < Searchlogic::Search

  include Searchlogic

  def foobar
    puts :custom_method
  end

end