completed_on filled when toggling completion

app/controllers/tasks_controller.rb

@@ -34,7 +34,7 @@ def update
   def complete
     @list = List.find(params[:list_id])
     @task = @list.tasks.find(params[:id])
-    @task.completed = !@task.completed
+    @task.toggle_completed
     @task.save
     respond_with( @task, :location => list_path(@list) )
   end

app/models/task.rb

@@ -4,4 +4,9 @@ class Task < ActiveRecord::Base
   scope :completed, where(:completed => true)
   scope :incomplete, where(:completed => false)
   default_scope order(:position)
+
+  def toggle_completed
+    self.update_attributes(:completed => !self.completed,
+                           :completed_on => Time.now)
+  end
 end

app/stylesheets/_standard.sass

@@ -1,17 +1,4 @@
-/*
- *
- *Stuff and Nonsense Ltd.
- *The Cow Shed Studio,
- *Gwaenysgor,
- *Flintshire, North Wales
- *LL18 6EP, UK
- *+44 1745 851848
- *http://stuffandnonsense.co.uk
- *http://forabeautifulweb.com
- *http://transcendingcss.com
- *http://twitter.com/malarkey
- *
- *SCREEN.CSS
+
 =sans-family
   :font-family Verdana, Helvetica, Arial, sans-serif
 

db/migrate/20100818184153_add_completed_on_to_tasks.rb

@@ -0,0 +1,10 @@
+class AddCompletedOnToTasks < ActiveRecord::Migration
+  def self.up
+    add_column :tasks, :completed_on, :datetime
+  end
+
+  def self.down
+    remove_column :tasks, :completed_on, :datetime
+  end
+
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20100818153305) do
+ActiveRecord::Schema.define(:version => 20100818184153) do
 
   create_table "lists", :force => true do |t|
     t.string   "name"
@@ -38,12 +38,13 @@
 
   create_table "tasks", :force => true do |t|
     t.string   "description"
-    t.boolean  "completed",   :default => false
+    t.boolean  "completed",    :default => false
     t.integer  "list_id"
     t.datetime "created_at"
     t.datetime "updated_at"
     t.text     "notes"
     t.integer  "position"
+    t.datetime "completed_on"
   end
 
 end

lib/tasks/add_completed_on.rake

@@ -0,0 +1,8 @@
+namespace :db do
+  task :fill_completed_on => :environment do
+    Task.completed.each do |t|
+      t.update_attributes(:completed_on => t.updated_at)
+    end
+  end
+end
+