81 lines
2.5 KiB
PHP
81 lines
2.5 KiB
PHP
<?php
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namespace SilverStripe\ORM\FieldType;
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use SilverStripe\Assets\File;
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use SilverStripe\Assets\Image;
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use SilverStripe\Core\Injector\Injector;
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use SilverStripe\Forms\DropdownField;
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use SilverStripe\Forms\FileHandleField;
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use SilverStripe\Forms\NumericField;
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use SilverStripe\ORM\DataList;
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use SilverStripe\ORM\DataObject;
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/**
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* A special type Int field used for foreign keys in has_one relationships.
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* @uses ImageField
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* @uses SimpleImageField
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* @uses FileIFrameField
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* @uses DropdownField
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*
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* @param string $name
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* @param DataObject $object The object that the foreign key is stored on (should have a relation with $name)
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*/
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class DBForeignKey extends DBInt
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{
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/**
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* @var DataObject
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*/
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protected $object;
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private static $default_search_filter_class = 'ExactMatchFilter';
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public function __construct($name, $object = null)
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{
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$this->object = $object;
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parent::__construct($name);
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}
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public function scaffoldFormField($title = null, $params = null)
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{
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if (empty($this->object)) {
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return null;
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}
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$relationName = substr($this->name, 0, -2);
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$hasOneClass = DataObject::getSchema()->hasOneComponent(get_class($this->object), $relationName);
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if (empty($hasOneClass)) {
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return null;
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}
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$hasOneSingleton = singleton($hasOneClass);
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if ($hasOneSingleton instanceof File) {
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$field = Injector::inst()->create(FileHandleField::class, $relationName, $title);
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if ($hasOneSingleton instanceof Image) {
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$field->setAllowedFileCategories('image/supported');
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}
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return $field;
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}
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// Build selector / numeric field
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$titleField = $hasOneSingleton->hasField('Title') ? "Title" : "Name";
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$list = DataList::create($hasOneClass);
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// Don't scaffold a dropdown for large tables, as making the list concrete
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// might exceed the available PHP memory in creating too many DataObject instances
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if ($list->count() < 100) {
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$field = new DropdownField($this->name, $title, $list->map('ID', $titleField));
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$field->setEmptyString(' ');
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} else {
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$field = new NumericField($this->name, $title);
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}
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return $field;
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}
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public function setValue($value, $record = null, $markChanged = true)
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{
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if ($record instanceof DataObject) {
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$this->object = $record;
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}
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parent::setValue($value, $record, $markChanged);
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}
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}
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