Hi, I am using the MultiSelectField module (see code). Is it possible two show a combination of for example 'Title' and a second text field (in my case 'Edition'. Something like 'Title . "and" . Edition'?

$participantlist = DataObject::get('Participant','','Title ASC'); 
$fields->addFieldToTab('Root.Content.Main', new MultiSelectField('Participants', 'Active participants', $participantlist->map('ID','Title')));

Easiest way to do it is to create a method in your Participant class:

class Participant extends DataObject {
  //...
  function getLongTitle() {
    return $this->Title . ' and ' . $this->Edition;
  }

and then you can call:

$participantlist->map('ID','LongTitle');

Jamie

Thank you. Very useful, because I have a long list of participants and some of them have almost the same 'Title' field.