在表单错误上返回ajax select字段

I have a form that triggers an ajax request to a view after the user tabs out of the 'address' field. It retrieves the zip code and then populates pickups with the same zip. The problem is that if there are any form errors is that the drop down with the results I generate from my get_pickups view is lost. How can I keep it so that even on form errors it will keep the resultsI have a form that triggers an ajax request to