public function updateCMSFields(FieldList $fields)
{
if ($this->stat('box_limit')) {
$fields->insertAfter(new Tab('PromoBoxes'), 'Main');
//content boxes
$boxes = PromoBox::get();
$aBoxes = $this->PromoBoxes()->toArray();
$dropBoxes = $boxes->map();
for ($i = 0; $i < $this->stat('box_limit'); $i++) {
$value = !empty($aBoxes[$i]) ? $aBoxes[$i]->ID : null;
$fields->addFieldToTab('Root.PromoBoxes', new DropdownField("PromoBoxes[{$i}]", 'Promo Box ' . ($i + 1), $dropBoxes, $value, null, 'No Box'));
}
}
}
