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Dependant dropdown menu's (Forms)




Community Member, 267 Posts

28 December 2011 at 4:09am

Edited: 28/12/2011 8:37am


How do you make a dependant dropdown menu on a Form?

i have a bookingsform:
- first dropdown menu returns a DataObject. Titles of pages can be selected.
- Now a secondary dropdown menu must be filled with possible dates/prices, which are stored in the DataObject 'DatesPrices'

How do i do this?

my first dropdown is generated by:

class Tour_Controller extends Page_Controller {

   public function getMyTours(){
      $today = date('Y-m-d');
      if($Pages = DataObject::get("Tour", "EndDate >= '$today'","StartDate", "", "" )){
         return $Pages->map('Title', 'Title', 'Please Select');
         return array('No Tours found');

class Tour_Controller extends Page_Controller {

   function BookingsForm() {
      $fields = new FieldSet(
         new DropdownField(
            'Select a trip',

Dates and prices are stored in:

class DatesPrice extends DataObject {
   public static $db = array(
      'Periode' => 'Text',
      'Price' => 'Int',
      'Comment' => 'Text',
      'SingleSupplement' => 'Int',
      'Description' => 'HTMLText',
   public static $has_one = array (
      'Tour' => 'Tour'
   public function getCMSFields_forPopup() {
      $fields = new FieldSet();
      $fields->push(new TextField('Periode'));
      $fields->push(new TextField('Price'));
      $fields->push(new TextField('Comment'));
      $fields->push(new TextField('SingleSupplement'));
      $fields->push(new SimpleTinyMCEField('Description'));
      return $fields;

i need the second form to check which value is selected on the first dropdown.. and then use that as some kind of filter on dataobject DatesPrices, but how?