If you have a bunch of methods in your controller that should all have scoping applied to the model interactions, this is the plugin for you.

Here’s an example:

  class Account < ActiveRecord::Base
    has_many :pages
  end

  class Page < ActiveRecord::Base
    belongs_to :account
  end

  class PageController < ApplicationController
    before_filter :login_required
    around_filter ScopedAccess::Filter.new(Page, :mine)

    protected
      def mine
        {
          :find => { :conditions => ["user_id = ?", session[:user_id] },
          :create => { :user_id => session[:user_id] }
        }
      end
    public
      def list
         @pages = Page.find(:all)
       end
       ...
  end

So, all the Page find and update methods will be scoped with the ID of the currently logged-in user. This makes it incredibly easy to implement access controls in multiple-user applications.

Check out the home page for more coolness this plugin provides.