CRUD with decent_exposure

incrudable.rb

# pulled out of a project authored by tpope && rbxbx
# not generic enough for general use, but a decent example of 
# an application specific restful crud abstraction

module Incrudable
  extend ActiveSupport::Concern

  included do
    expose(controller_name) { controller_name.classify.constantize.scoped }
    expose(controller_name.singularize)
  end

  def resource
    send(controller_name.singularize)
  end

  def create
    flash[:notice] = "#{resource.class.model_name.human} was successfully created" if resource.save
    respond_with resource, :location => (default_redirect || resource.admin_hierarchy(:edit))
  end

  def update
    flash[:notice] = "#{resource.class.model_name.human} was successfully updated" if resource.save
    respond_with resource, :location => (default_redirect || resource.admin_hierarchy(:edit))
  end

  def destroy
    resource.destroy
    flash[:notice] = "#{resource.class.model_name.human} has been deleted"
    redirect_to default_redirect || [:admin] + resource.ancestors + [controller_name]
  end

  def default_redirect
    nil
  end

end