/**
* @param callable $primaryToString
* @return Form
*/
public function addGroupActionCheckboxes(callable $primaryToString)
{
if ($this->lazyCreateContainer('actions', 'records', $records)) {
$i = 0;
foreach ($this->getParent()->getData() as $record) {
$primary = $primaryToString($record);
$records[$primary] = $checkbox = new Checkbox();
if ($i++ === 0) {
$checkbox->addRule(__CLASS__ . '::validateCheckedCount', 'Choose at least one record.');
}
}
}
foreach ($this['actions']['buttons']->getComponents() as $button) {
$button->setValidationScope([$this['actions']['records']]);
}
return $this;
}
