date_select in a partial

Hello,

Currently I have a date_select in a form partial. This partial is
rendered by the edit and new form-actions.

But the problem is that when I go into the new page and save the form
it automaticly selects the current date. Actually I want that with the
new action the selected date are empty values (:include_blank) and
when Im in the edit form I want him to extract the values from the
data given (if nil > show empty entries).

What is the most elegant approach for this?

Kind regards,
Don Pinkster