Show Doctrine Twig Collection? (Symfony2)

Question

I have a fairly simple doctrine representing the news; this news can be associated with many pictures, so I decided to use the Doctrine collection. The thing is, I want to get these photos and display them in my template ... But that didn't seem to work. Do you know how I can do this?

Here is what I tried:

{% for annonce in annonces %}
    <div class="annonce_item">
    {% for photo in annonce.photo  %}
        <img src="{{ photo.path }}" alt="" />
    {% endfor %}
</div>
<!-- End .annonce_item -->
{% endfor %}

annonce is a news class, and a photo is a collection:

/**
 * @ORM\OneToMany(targetEntity="Photo", mappedBy="id",cascade={"persist"})
 */

private $photo;

When I try to display this page in my browser, I get this exception:

( ": Undefined index: > id in > /Applications/MAMP/htdocs/ApacheImmobilier/vendor/doctrine/lib/Doctrine/ORM/Persisters/Basi > cEntityPersister.php line 1274" ) "APPagesBundle: Index: index.html.twig" 45.

!

Answer 1

. :

mappedBy , .

news Photo.