#---
# Excerpted from "Agile Web Development with Rails, 3rd Ed.",
# published by The Pragmatic Bookshelf.
# Copyrights apply to this code. It may not be used to create training material, 
# courses, books, articles, and the like. Contact us if you are in doubt.
# We make no guarantees that this code is fit for any purpose. 
# Visit http://www.pragmaticprogrammer.com/titles/rails3 for more book information.
#---
module InPlaceEditing
  def self.included(base)
    base.extend(ClassMethods)
  end

  # Example:
  #
  #   # Controller
  #   class BlogController < ApplicationController
  #     in_place_edit_for :post, :title
  #   end
  #
  #   # View
  #   <%= in_place_editor_field :post, 'title' %>
  #
  module ClassMethods
    def in_place_edit_for(object, attribute, options = {})
      define_method("set_#{object}_#{attribute}") do
        @item = object.to_s.camelize.constantize.find(params[:id])
        @item.update_attribute(attribute, params[:value])
        render :text => @item.send(attribute).to_s
      end
    end
  end
end
