Adding related items using Sonata Admin and Propel

You could use the plain old collection field type.

Given the following ImageType:

class ImageType extends AbstractType{    public function buildForm(FormBuilderInterface $builder, array $options)    {        $builder->add('title', 'text');        $builder->add('description', 'textarea');        $builder->add('file', 'file', array('required' => false));    }    public function getName()    {        return 'image';    }}

The PortfolioAdmin class becomes:

class PortfolioAdmin extends Admin{    protected $baseRouteName = 'portfolio';    protected $baseRoutePattern = 'portfolio';    // Fields to be shown on create/edit forms    protected function configureFormFields(FormMapper $formMapper)    {        $formMapper            ->add('title', 'text', array('label' => 'Title'))            ->add('images', 'collection', array(                'type'         => new ImageType(),                'by_reference' => false,                'allow_add'    => true,                'allow_delete' => true,            ))            ->add('description', 'text', array('label' => 'Description'))        ;    }}