Rescue from invalid dates at write_attribute to preserve ActiveRecord…

… original behavior.

Closes clemens#6.

lib/delocalize/rails_ext/active_record.rb

@@ -12,15 +12,16 @@ def time?
 end
 
 ActiveRecord::Base.class_eval do
-  def write_attribute_with_localization(attr_name, value)
+  def write_attribute_with_localization(attr_name, original_value)
+    new_value = original_value
     if column = column_for_attribute(attr_name.to_s)
       if column.date?
-        value = Date.parse_localized(value)
+        new_value = Date.parse_localized(original_value) rescue original_value
       elsif column.time?
-        value = Time.parse_localized(value)
+        new_value = Time.parse_localized(original_value) rescue original_value
       end
     end
-    write_attribute_without_localization(attr_name, value)
+    write_attribute_without_localization(attr_name, new_value)
   end
   alias_method_chain :write_attribute, :localization
 

test/delocalize_test.rb

@@ -57,6 +57,13 @@ def setup
     assert_equal time, @product.cant_think_of_a_sensible_time_field
   end
 
+  test "invalid dates should be delocalized to nil" do
+    date = '32. Oktober 2009'
+    @product.released_on = date
+    assert_equal nil, @product.released_on
+    assert_equal date, @product.released_on_before_type_cast
+  end
+
   test "uses default parse if format isn't found" do
     date = Date.civil(2009, 10, 19)