Move timeliness defined methods to a module so they can be overwritten.

spec/spec_helper.rb

@@ -75,6 +75,13 @@ class Employee < ActiveRecord::Base
   validates_time :birth_time
   validates_datetime :birth_datetime
   define_attribute_methods
+
+  attr_accessor :redefined_birth_date_called
+
+  def birth_date=(value)
+    self.redefined_birth_date_called = true
+    super
+  end
 end
 
 Rspec.configure do |c|

spec/validates_timeliness/attribute_methods_spec.rb

@@ -34,6 +34,12 @@ describe ValidatesTimeliness::AttributeMethods do
       r._timeliness_raw_value_for(:birth_datetime).should == date_string
     end
 
+    it 'should not overwrite user defined methods' do
+      e = Employee.new
+      e.birth_date = '2010-01-01'
+      e.redefined_birth_date_called.should be_true
+    end
+
     context "with plugin parser" do
       class PersonWithParser
         include TestModel