voltechs

class Membership < ActiveRecord::Base
	# attr_accessible :title, :body
	
	set_primary_keys :user_id, :group_id
	  
	belongs_to :user
	belongs_to :group

	# Weird that we have to say "belongs_to", but it works.
	belongs_to :role

voltechs

	scope :roles_in_group, lambda { |g| { :conditions => { :roles => {:memberships => {:group => g.ancestors}}}}}