Clean up validation example

activemodel/examples/amo_ap_example.rb → activemodel/examples/validations.rb

-$:.push "activesupport/lib"
-$:.push "activemodel/lib"
-
-require "active_model/validations"
-require "active_model/deprecated_error_methods"
-require "active_model/errors"
-require "active_model/naming"
+require 'activemodel'
 
 class Person
+  include ActiveModel::Conversion
   include ActiveModel::Validations
-  extend ActiveModel::Naming
-  
+
   validates_presence_of :name
-  
+
   attr_accessor :name
+
   def initialize(attributes = {})
     @name = attributes[:name]
   end
-  
+
   def persist
     @persisted = true
   end
-  
+
   def new_record?
     @persisted
   end
-  
-  def to_model() self end
 end
 
 person1 = Person.new
@@ -33,4 +26,4 @@ def to_model() self end
 person1.errors
 
 person2 = Person.new(:name => "matz")
-p person2.valid?
\ No newline at end of file
+p person2.valid?