## DB Attributes for discussions table
title
body
discussable_id
discussable_type
type
created_at
updated_at

## Main Discussion model
class Discussion < ActiveRecord::Base
  belongs_to :user
  belongs_to :discussable, :polymorphic=>true
  has_many :discussion_replies, :as=>:discussable
end

## Subtypes of discussions, with a reference to the parent discussion as their discussable
class DiscussionReply < Discussion; end;

class Critique < Discussion; end;

class Event < Discussion; end;

## Parents of main discussion topics

class Project < ActiveRecord::Base
  has_many :discussions, :as=>:discussable
  has_many :events, :as=>:discussable
end

class Group < ActiveRecord::Base
  has_many :discussions, :as=>:discussable
  has_many :critiques, :as=>:discussable
end