Add user photos

app/models/person.rb

@@ -1,5 +1,5 @@
 class Person < ActiveRecord::Base
-  attr_accessible :email, :first_name, :last_name, :public_name, :biography, :company
+  attr_accessible :email, :first_name, :last_name, :public_name, :biography, :company, :avatar
 
   has_many :event_people, :dependent => :destroy
   has_many :events, :through => :event_people, :uniq => true
@@ -11,6 +11,10 @@ class Person < ActiveRecord::Base
   before_create :generate_guid
   before_save :set_public_name
 
+  has_attached_file :avatar,
+                    :styles => {:tiny => "16x16>", :small => "32x32>", :large => "128x128>"},
+                    :default_url => "person_:style.png"
+  validates_attachment_content_type :avatar, :content_type => [/jpg/, /jpeg/, /png/, /gif/]
   def to_s
     if self.public_name.empty?
       self.first_name + " " + self.last_name

app/views/devise/registrations/edit.html.haml

@@ -5,6 +5,8 @@
         = f.fields_for :person do |p|
           = p.inputs :first_name, :last_name, :public_name
           = p.input :company, :label => "Affiliation", :hint => "This could be a company, a user group, or nothing at all."
+          = image_tag current_user.person.avatar(:small)
+          = p.input :avatar, :label => "Picture", :hint => "Upload a new picture."
           = p.input :biography,  :input_html => {:rows => 5, "onkeyup" => "word_count(this, 'biography-count')"}, :for => :person
           You have used
           %span#biography-count #{current_user.person.biography_word_count}