Move finder to named_scope

Please go to http://rails-bestpractices.com/posts/1-move-finder-to-named_scope

Before:

class PostsController < ApplicationController
  def index
    @published_posts = Post.find(:all, :conditions => { :state => 'published' },
                                       :limit => 10,
                                       :order => 'created_at desc')

    @draft_posts = Post.find(:all, :conditions => { :state => 'draft' },
                                   :limit => 10,
                                   :order => 'created_at desc')
  end
end

After:

class PostsController < ApplicationController

  def index
    @published_posts = Post.published
    @draft_posts = Post.draft
  end

end

class Post < ActiveRecord::Base

  named_scope :published, :conditions => { :state => 'published' },
                          :limit => 10, :order => 'created_at desc'
  named_scope :draft, :conditions => { :state => 'draft' },
                      :limit => 10, :order => 'created_at desc'

end