fixed non-timezone write method not updating changed attributes hash

lib/validates_timeliness/attribute_methods.rb

@@ -104,7 +104,7 @@ module ValidatesTimeliness
       def define_write_method_for_time_zone_conversion(attr_name)
         method_body = <<-EOV
           def #{attr_name}=(time)
-            old = read_attribute('#{attr_name}') if defined?(ActiveRecord::Dirty)
+            old = read_attribute('#{attr_name}')
             @attributes['#{attr_name}'] = time
             unless time.acts_like?(:time)
               time = self.class.parse_date_time(time, :datetime)
@@ -146,7 +146,12 @@ module ValidatesTimeliness
       def define_write_method_for_dates_and_times(attr_name, type)
         method_body = <<-EOV
           def #{attr_name}=(value)
-            @attributes_cache['#{attr_name}'] = self.class.parse_date_time(value, :#{type})
+            old = read_attribute('#{attr_name}') if defined?(ActiveRecord::Dirty)
+            new = self.class.parse_date_time(value, :#{type})
+            @attributes_cache['#{attr_name}'] = new
+            if defined?(ActiveRecord::Dirty) && !changed_attributes.include?('#{attr_name}') && old != new
+              changed_attributes['#{attr_name}'] = (old.duplicable? ? old.clone : old)
+            end
             @attributes['#{attr_name}'] = value
           end
         EOV

spec/attribute_methods_spec.rb

@@ -113,18 +113,28 @@ describe ValidatesTimeliness::AttributeMethods do
       
   end
   
-  it "should return same time object on repeat reads" do
+  it "should return same time object on repeat reads on existing object" do
     Time.zone = 'Melbourne' unless RAILS_VER < '2.1'
     time_string = "2000-01-01 09:00:00"
     @person = Person.new
     @person.birth_date_and_time = time_string
-    @person.save
+    @person.save!
     @person.reload
     time = @person.birth_date_and_time
     @person.birth_date_and_time.should == time
   end
   
-  it "should return correct value after new value assigned" do
+  it "should return same date object on repeat reads on existing object" do
+    date_string = Date.today
+    @person = Person.new
+    @person.birth_date = date_string
+    @person.save!
+    @person.reload
+    date = @person.birth_date
+    @person.birth_date.should == date
+  end
+  
+  it "should return correct date value after new value assigned" do
     today = Date.today
     tomorrow = Date.today + 1.day    
     @person = Person.new
@@ -134,4 +144,14 @@ describe ValidatesTimeliness::AttributeMethods do
     @person.birth_date.should == tomorrow
   end
  
+  it "should update date attribute on existing object" do
+    today = Date.today
+    tomorrow = Date.today + 1.day
+    @person = Person.create(:birth_date => today)
+    @person.birth_date = tomorrow
+    @person.save!
+    @person.reload
+    @person.birth_date.should == tomorrow
+  end
+ 
 end