Relationships links about json-api-php HOT 2 CLOSED

<?php

use Tobscure\JsonApi\AbstractSerializer;
use Tobscure\JsonApi\Document;
use Tobscure\JsonApi\Relationship;
use Tobscure\JsonApi\Resource;

require 'vendor/autoload.php';

class ArticleSerializer extends AbstractSerializer
{
    protected $type = 'articles';

    public function getAttributes($article, array $fields = null)
    {
        return [
            'title' => $article->title
        ];
    }

    public function author($article)
    {
    	$element = new Resource($article->author, new PersonSerializer);

    	$relationship = new Relationship($element);

    	$relationship->addLink('self', '/articles/'.$article->id.'/relationships/author');
    	$relationship->addLink('related', '/articles/'.$article->id.'/author');

    	return $relationship;
    }
}

class PersonSerializer extends AbstractSerializer
{
    protected $type = 'people';
}

$article = (object) [
	'id' => 1,
	'title' => 'Rails is Omakase',
	'author' => (object) [
		'id' => 9
	]
];

$resource = new Resource($article, new ArticleSerializer);
$resource->with(['author']);

$document = new Document($resource);

echo json_encode($document, JSON_PRETTY_PRINT);