DOM-ORM

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Mezzio ​

Wire DOM-ORM into a Mezzio 3 app. Mezzio handlers are classes, so just add EntityManagerTrait to the handler.

Installation ​

bash
composer require vardumper/dom-orm

Config ​

Create config/dom-orm.php (DOM-ORM auto-loads it from the working directory):

php
// config/dom-orm.php
<?php return [
    'dom-orm' => [
        'flysystem' => [
            'adapter' => League\Flysystem\Local\LocalFilesystemAdapter::class,
            'config' => [__DIR__ . '/../data/dom-orm'],
        ],
        'filename' => 'data.xml',
        'encryption_key' => getenv('DOM_ORM_ENCRYPTION_KEY') ?: null, // optional
    ],
];

Entity ​

A minimal entity to work with:

php
// src/Entity/Tag.php
use DOM\ORM\Entity\AbstractEntity;
use DOM\ORM\Mapping as ORM;

#[ORM\Item(entityType: 'tag')]
class Tag extends AbstractEntity
{
    public function __construct(
        #[ORM\Fragment]
        private string $name,
    ) {
        parent::__construct();
    }
}

Usage ​

Add the trait to the handler — no container registration needed. The trait auto-initializes on first use:

php
// src/Handler/TagHandler.php
<?php

declare(strict_types=1);

namespace App\Handler;

use App\Entity\Tag;
use DOM\ORM\EntityRepository;
use DOM\ORM\Traits\EntityManagerTrait;
use Mezzio\AbstractHandler;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;

class TagHandler extends AbstractHandler
{
    use EntityManagerTrait;

    public function handle(ServerRequestInterface $request): ResponseInterface
    {
        $this->persist(new Tag('Hello'));

        return $this->responseFactory->createResponse();
    }
}

Register the handler in the pipeline as usual (config/pipeline.php):

php
// config/pipeline.php
$app->pipe('/tags', TagHandler::class);

Queries go through EntityRepository as usual:

php
$tags = (new EntityRepository(Tag::class))->findAll();