在Silverstripe CMS 3.1中的OptionsetField中创建自定义字段

I want to choose the type of my calendar events from some predefined values but also, create a new (custom) type if it's not listed.

So i have created the field in $db like so: 'Type' => 'Varchar', 'EventCustomType' => 'Varchar'

Then, in the getCMSFields() i have:

$f->addFieldsToTab("Root.Main", $eventType = new OptionsetField(
            'Type',
            _t('CalendarEvent.EVENTTYPE','Type'),
            array (
                'music'  => _t('CalendarEvent.MUSIC','Music'),
                'sport'  => _t('CalendarEvent.SPORT','Sport'),
                'drama'  => _t('CalendarEvent.DRAMA','Drama'),
                'custom' => TextField::create('EventCustomType','Event type')
            )
        )
    );

The problem is that i don't know how to insert the label "Custom" before the Textareafield and style them in the same line.

Also, i'm not sure if i need a second field for the custom one. Can i insert the custom value inside "Type" field or validate it ?

Thanks for any suggestions

This could be achieved by having a separate field for "EventCustomType" and then using Display Logic to show it with something like...

$eventType = OptionsetField::create(
    'Type',
    _t('CalendarEvent.EVENTTYPE','Type'),
    array (
    'music'  => _t('CalendarEvent.MUSIC','Music'),
    'sport'  => _t('CalendarEvent.SPORT','Sport'),
    'drama'  => _t('CalendarEvent.DRAMA','Drama'),
    'custom' => _t('CalendarEvent.CUSTOM','Custom'),
    )
);

$fEventCustomType = TextField::create('EventCustomType','Event type')
    ->displayIf('Type')->isEqualTo('custom');

$f->addFieldsToTab("Root.Main", array($eventType,$fEventCustomType));

As an alternative if you wanted to rescue This module then you could create this to save into one field as it is designed to do as you are asking... but it is with an error (last time I tried) so it is refernce only for now.

Finally, i have figured it out with separate fields:

    $eventType = OptionsetField::create(
        'Type',
        _t('CalendarEvent.EVENTTYPE','Type'),
        array (
        'music'  => _t('CalendarEvent.MUSIC','Music'),
        'sport'  => _t('CalendarEvent.SPORT','Sport'),
        'drama'  => _t('CalendarEvent.DRAMA','Drama'),
        'custom' => _t('CalendarEvent.CUSTOM','Custom'),
        )
    );

    $customEventType = TextField::create('EventCustomType','Custom type');

    $f->addFieldsToTab("Root.Main", array($eventType,$customEventType));

and jQuery:

$('#Root_Main').entwine({
    onmatch: function(){
        var $tab = this.closest('.tab');
        var $eventType = $tab.find('ul.eventType');
        var $customType = $tab.find('.customEventType').hide();

        if($eventType.find('input:checked').val() == 'custom'){
            $customType.show();
        }

        $eventType.find('input').change(function(){
            if($(this).val() == 'custom'){
                $customType.show();
            }else{
                $customType.hide();
            }
        });
    }
});