define_method_attribute=

# File activerecord/lib/active_record/attribute_methods/time_zone_conversion.rb, line 33
        def define_method_attribute=(attr_name)
          if create_time_zone_conversion_attribute?(attr_name, columns_hash[attr_name])
            method_body, line =               def #{attr_name}=(time)                time_with_zone = time.respond_to?(:in_time_zone) ? time.in_time_zone : nil                previous_time = attribute_changed?("#{attr_name}") ? changed_attributes["#{attr_name}"] : read_attribute(:#{attr_name})                write_attribute(:#{attr_name}, time)                #{attr_name}_will_change! if previous_time != time_with_zone                @attributes_cache["#{attr_name}"] = time_with_zone              end, __LINE__ + 1
            generated_attribute_methods.module_eval(method_body, __FILE__, line)
          else
            super
          end
        end