Doctrine 2.1 - OneToMany relation, data downloading - php

Question

I have two classes:
User:
/** #Entity #Table(name="users") */
class User {
/**
* #Id #GeneratedValue #Column(type="integer")
* #var integer
*/
protected $id;
/**
* #Column(type="string", length=20, unique=TRUE)
* #var string
*/
protected $login;
/**
* #OneToMany(targetEntity="News", mappedBy="author")
*/
protected $news;
public function __construct() {
$this->news = new \Doctrine\Common\Collections\ArrayCollection;
}
}
and News:
/** #Entity #Table(name="news") */
class News {
/**
* #Id #GeneratedValue #Column(type="integer")
* #var integer
*/
protected $id;
/**
* #Column(type="string", length=100)
* #var string
*/
protected $title;
/**
* #Column(type="text")
* #var string
*/
protected $content;
/**
* #ManyToOne(targetEntity="User", inversedBy="news")
* #JoinColumn(referencedColumnName="id")
*/
protected $author;
}
When I will make this code
$q = $this->db->createQuery('SELECT u FROM User u WHERE u.id = '.$id);
$user = $q->getSingleResult();
does the Doctrine will download all news (created by particular user) from database?

Answer 1

It won't until you request a user's news by calling the news accessor method. If you rewrite your query as
SELECT u, n FROM User u JOIN u.news n
Then a user and his news will be all returned as the result.
You can also check the query generated by doctrine using a logger:
$config->setSQLLogger(new Doctrine\DBAL\Logging\EchoSQLLogger);
PS: never do this: u.id = '.$id in queries to avoid sql injections. Instead, use placeholders:
$q = $this->db->createQuery('SELECT u FROM User u WHERE u.id = :id');
$q->setParameter('id', $id);