ExtSTI

Extending STI with inheritance through association.

Usage

Gemfile:

gem 'ext_sti', :git => 'git://github.com/fuCtor/ext_sti.git'

Models:

class Post < ActiveRecord::Base
    attr_accessible :name

    acts_as_ati :type, :class_name => PostType, :foreign_key => :post_type_id, :field_name => :name do |type|       
        "#{type}Post"
    end    
end

class ForumPost < Post
    attr_accessible :name    
    ati_type :forum
end

class BlogPost < Post
    attr_accessible :name  
    ati_type :blog
end