add option to pre register to events

app/models/event.rb

@@ -2,13 +2,15 @@ class Event < ActiveRecord::Base
   include ActiveRecord::Transitions
   has_paper_trail
   attr_accessible :title, :subtitle, :abstract, :description, :event_type_id, :people_attributes, :person,
-                  :proposal_additional_speakers, :track_id, :video_id, :video_type
+                  :proposal_additional_speakers, :track_id, :video_id, :video_type, :require_registration
   acts_as_commentable
 
   has_many :event_people, :dependent => :destroy
   has_many :event_attachments, :dependent => :destroy
   has_many :people, :through => :event_people
   belongs_to :event_type
+  
+  has_and_belongs_to_many :registrations
 
   belongs_to :track
   belongs_to :room

app/models/registration.rb

@@ -8,7 +8,8 @@ class Registration < ActiveRecord::Base
 
   attr_accessible :person_id, :conference_id, :attending_social_events, :attending_with_partner,
                   :using_affiliated_lodging, :arrival, :departure, :person_attributes, :other_dietary_choice, :dietary_choice_id,
-                  :handicapped_access_required, :supporter_registration_attributes, :social_event_ids, :other_special_needs
+                  :handicapped_access_required, :supporter_registration_attributes, :social_event_ids, :other_special_needs,
+                  :event_ids
 
   accepts_nested_attributes_for :person
   accepts_nested_attributes_for :supporter_registration