onetomany.php

См. документацию.

<?php
 
namespace Bitrix\Main\ORM\Fields\Relations;
 
use Bitrix\Main\ORM\Entity;
use Bitrix\Main\ORM\Fields\FieldTypeMask;

class OneToMany extends Relation
{
    protected $referenceName;

    protected $cascadeSavePolicy = CascadePolicy::FOLLOW;
 
    protected $cascadeDeletePolicy = CascadePolicy::SET_NULL; // follow | no_action | set_null
 
    public function __construct($name, $referenceEntity, $referenceName)
    {
        $this->referenceName = $referenceName;
 
        if ($referenceEntity instanceof Entity)
        {
            $this->refEntity = $referenceEntity;
            $this->refEntityName = $referenceEntity->getFullName();
        }
        else
        {
            // this one could be without leading backslash and/or with Table-postfix
            $this->refEntityName = Entity::normalizeName($referenceEntity);
        }
 
        parent::__construct($name);
    }
 
    public function getTypeMask()
    {
        return FieldTypeMask::ONE_TO_MANY;
    }
 
    public function getRefField()
    {
        return $this->getRefEntity()->getField($this->referenceName);
    }

    public function getReferenceName()
    {
        return $this->referenceName;
    }
}