lekoala / silverstripe-form-elements

src/TomSelectMultiField.php

<?php

namespace LeKoala\FormElements;

use Exception;
use SilverStripe\ORM\Relation;
use SilverStripe\ORM\DataObject;
use SilverStripe\Forms\ListboxField;
use SilverStripe\ORM\DataObjectInterface;

/**
 * @link https://tom-select.js.org/
 */
class TomSelectMultiField extends ListboxField implements AjaxPoweredField, LocalizableField, TagsField
{
    use TomSelect;

The trait LeKoala\FormElements\TomSelect requires some properties which are not provided by LeKoala\FormElements\TomSelectMultiField: $ID, $db

    /**
     * @param DataObject|DataObjectInterface $record The record to save into
     */
    public function saveInto(DataObjectInterface $record)
    {
        $fieldName = $this->getName();
        if (empty($fieldName) || empty($record)) {
            return;
        }

        /** @var Relation $relation */
        $relation = $record->hasMethod($fieldName) ? $record->$fieldName() : null;

        // Detect DB relation or field
        $items = $this->getValueArray();
        if ($relation && $relation instanceof Relation) {

$relation is always a sub-type of SilverStripe\ORM\Relation.

            foreach ($items as $idx => $item) {
                // If the item is a string, it's not an ID and needs to be created
                if (!is_numeric($item)) {
                    $cb = $this->onNewTag;
                    if (!$cb) {
                        throw new Exception("Please define a onNewTag callback");
                    }
                    $items[$idx] = $cb($item);
                }
            }
            // Save ids into relation
            $relation->setByIDList(array_values($items));
        } elseif ($record->hasField($fieldName)) {
            // Save dataValue into field
            $record->$fieldName = $this->stringEncode($items);
        }
    }
}