Example:
 
  # Controller
  class BlogController < ApplicationController
    auto_complete_for :post, :title
  end
 
  # View
  <%= text_field_with_auto_complete :post, title %>
 
By default, auto_complete_for limits the results to 10 entries,
and sorts by the given field.
 
auto_complete_for takes a third parameter, an options hash to
the find method used to search for the records:
 
  auto_complete_for :post, :title, :limit => 15, :order => 'created_at DESC'
 
For more examples, see script.aculo.us:
* http://script.aculo.us/demos/ajax/autocompleter
* http://script.aculo.us/demos/ajax/autocompleter_customized
 
Copyright (c) 2007 David Heinemeier Hansson, released under the MIT license