doctrine-orm.md

Doctrine ORM integration

The doctrine/orm library is an object-relational mapper (ORM) that provides transparent persistence for PHP objects.

Usage Finder

The DoctrineORMIntrospectionUsageFinder uses Doctrine ORM metadata and finds related entities to the resource you are about to delete.

With the following mapping :

<?php

/**
 * @ORM\Entity()
 */
class Product
{
    /**
     * @ORM\ManyToOne(targetEntity="Product")
     */
    public $soldWith;

    /**
     * @ORM\ManyToOne(targetEntity="Product")
     * @ORM\JoinColumn(onDelete="CASCADE", nullable=true)
     */
    public $parent;

    /**
     * @ORM\OneToOne(targetEntity="Product")
     * @ORM\JoinColumn(onDelete="SET NULL", nullable=true)
     */
    public $replaces;

    /**
     * @ORM\ManyToMany(targetEntity="Product")
     */
    public $crossSell;
}

Asking for usages of a Product instance can retrieve :

• Product the product is sold with of, with Relation::RESTRICT link type
• Product the product is parent of, with Relation::DELETE link type
• Product the product replaces, with Relation::UNLINK link type
• Product the product cross sells, with Relation::DELETE link type

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