ActsAsRestricted
================

Restrict read/write access to your active record classes via named scope

so you can use your models exactly as normal but add a restricted method/filter:

Message.restricted.find(:all)

and all instantiated objects from the find should be tainted as restricted objects so you can also restrict writes to that data.

Preamble
========

TODO
====

Need to add restricted writes back in on instantiated restricted objects, this was lost after a rewrite to move to named_scope since rails 2.1

Example
=======

install plugin

add the following line to your class:

   acts_as_restricted :read => true, :write => true

the options instruct whether to restrict access to read or write, by default both are set to true.
Also by default acts_as_restricted will restrict all access.

you can set specific conditions for reading and writing in the class by optionally adding these functions:

this example is from my project currently using the plugin and restricts read/write access to messages and received messages.

  acts_as_restricted :read => true, :write => true

  todo: restricted writes to be added back in..

  def self.restricted_condition
      if current_user
        "sender_uid = #{current_user.id} or message_recipients.recipient_uid = #{current_user.id}"
      else
         ActsAsRestricted::SQL_NO_ACCESS # actually this is just "0"
      end
  end

  def self.restricted_join
      "LEFT OUTER JOIN message_recipients ON message_recipients.message_id = messages.id"
  end

  def self.restricted_select
      "messages.*"
  end

Both default_condition and default_join allow you to add conditions or joins to finders with scope and keep all existing joins etc intact.

the current_user function is also made available and grabs from the current thread:Thread.current['user']

the plugin allows you to limit data retrieved, you completely restrict, or return subsets of data. You can also control writes to data (including create)

Examples
========

>>  Thread.current['user'] = User.find_by_id(1)

Copyright (c) 2008 [Stephen Strudwick], released under the MIT license