SonataAdminBundle configureShowFields with nested entities

Question

For a project which uses symfony2 and the SonataAdminBundle, I am trying to figure out how to embed complete related entities in the show action.

To get more into detail, let's say I have a Article and a Comment. On the show view for the Article, I'd like to show each Comment with multiple properties as well as an EDIT on each and a CREATE to add another comment to that Article.

I was able to get it to get it to display a list of Comment entities which link to the Entity by using ->add('comments'), but that's not enough. I need to have the entity really embedded!

Is there a way to do this without coding it on our own? And if doing it manually is the only way, what's the best approach? Rewriting the template?

Answer 1

Simplest way is to specify a template for the collection:

$showMapper->add('comments', 'collection', [
    'template' => 'YourBundle:SomePath:SubPath/show_comment_collection.html.twig',
]);

Look to SonataAdminBundle:CRUD:base_show_field.html.twig for a template to use as an example. And, in that template, you can loop over the value variable. For example:

{% block field %}
    <ul>
    {% for comment in value %}
        <li><a href="{{ path('some_route', {'id': comment.id}) }}">
            {{ comment.id }} - {{ comment.otherProperty}}</a>
        </li>
    {% else %}
        <li>No comments</li>
    {% endfor %}
    </ul>
{% endblock %}