gistfile1.builder

require 'active_record/transitions.rb'

class Forum < ActiveRecord::Base
  include ActiveRecord::Transitions
  acts_as_nested_set

  # Associations
  has_many :posts
  
  # Validations
  validates_presence_of :name, :state
  
  state_machine do 
    state :open
    state :locked
    state :hidden

    event :open do
      transitions :to => :open, :from => [:locked, :hidden]
    end
    
    event :lock do
      transitions :to => :locked, :from => [:open, :hidden]
    end
    
    event :hidden do
      transitions :to => :hidden, :from => [:open, :locked]
    end
  end
end