Use render instead of redirect if registration/create fails

app/models/person.rb

@@ -4,6 +4,7 @@ class Person < ActiveRecord::Base
 
   attr_accessible :email, :first_name, :last_name, :public_name, :biography, :company, :avatar, :irc_nickname
 
+  belongs_to :user, :inverse_of => :person
   has_many :event_people, :dependent => :destroy
   has_many :events, :through => :event_people, :uniq => true
   has_many :registrations, :dependent => :destroy