README

REST/CRUD conventions from http://project.ioni.st/post/2283#snippet_2283

accounts_controller.rb

class AccountsController < ApplicationController
  set_resource :account
    
  def index
    @accounts = Account.all
    default_formats_for @accounts
  end

  def show
    default_formats_for @account
  end
end

application.rb

class ApplicationController < ActionController::Base
  def self.set_resource(resource, &custom_setter)
    filter_name = :"set_#{resource}"
    before_filter filter_name, 
      :only => [:show, :edit, :update, :destroy]
    
    if custom_setter
      define_method(filter_name) do
        custom_setter.call(resource)
      end
    else
      define_method(filter_name) do
        instance_variable_set(
          "@#{resource}",
          resource.to_s.classify.find(params[:id])
        )
      end
    end
  end
  
  def self.default_formats_for(data)
    respond_to do |format|
      format.html
      format.xml  { render :xml => data }
    end
  end
end