fixe for attribute write and raw value methods

add new generalised method to get raw value without dependence on
before_type_cast which may not be supported in ORMs

call super to define full ORM write method default

lib/validates_timeliness/attribute_methods.rb

@@ -22,9 +22,16 @@ module ValidatesTimeliness
             end
           EOV
           class_eval(method_body, __FILE__, line)
-        else
-          super
         end
+        super rescue(NoMethodError)
+      end
+
+    end
+
+    module InstanceMethods
+
+      def _timeliness_raw_value_for(attr_name)
+        @attributes_cache && @attributes_cache["_#{attr_name}_before_type_cast"]
       end
 
     end
@@ -35,7 +42,7 @@ module ValidatesTimeliness
         if timeliness_validated_attributes.include?(attr_name)
           method_body, line = <<-EOV, __LINE__ + 1
             def #{attr_name}_before_type_cast
-              @attributes_cache && @attributes_cache["_#{attr_name}_before_type_cast"]
+              _timeliness_raw_value_for('#{attr_name}')
             end
           EOV
           class_eval(method_body, __FILE__, line)

lib/validates_timeliness/validator.rb

@@ -56,8 +56,7 @@ module ValidatesTimeliness
     end
 
     def attribute_raw_value(record, attr_name)
-      before_type_cast = "#{attr_name}_before_type_cast"
-      record.send(before_type_cast) if record.respond_to?(before_type_cast)
+      record._timeliness_raw_value_for(attr_name)
     end
 
     def type_cast(value)