Q:

symfony3 & SonataAdmin & Formatter Bundle - Error when using formatter options "target_field" do not exist

I'm using symfony 3.1.4 and install SonataAdminBundle, SonataFormatterBundle. 
I'm having troubles using the Sonata Formatter Bundle.

Install SonataFormatterBundle by this guide: 
I have an Entity: BlogSpost with 3 fields: 

/**
 * @var string
 *
 * @ORM\Column(name="body", type="blob")
 */
private $body;
/**
 * @var string
 *
 */
private $rawBody;
/**
 * @var string
 *
 */
private $bodyFormatter ;

Here is my formmapper in BlogPostAdmin class

class BlogPostAdmin extends AbstractAdmin
{
    protected function configureFormFields(FormMapper $formMapper)
    {
        $formMapper->add('title', 'text')
            ->add('bodyFormatter', 'sonata_formatter_type', array(
                'source_field'         => 'rawBody',
                'source_field_options' => array('attr' => array('class' => 'span10', 'rows' => 20)),
                'format_field'         => 'bodyFormatter',
                'target_field'         => 'body',
                'event_dispatcher'     => $formMapper->getFormBuilder()->getEventDispatcher()
            ))
            ->add('draft')
            ->add('published_time');
    }
    // ...

But i receive this error below, when try to create a Post. 

The options "event_dispatcher", "format_field", "source_field", "source_field_options", "target_field" do not exist. Defined options are: "action", "allow_extra_fields", "attr", "auto_initialize", "block_name", "by_reference", "compound", "constraints", "csrf_field_name", "csrf_message", "csrf_protection", "csrf_token_id", "csrf_token_manager", "data", "data_class", "disabled", "empty_data", "error_bubbling", "error_mapping", "extra_fields_message", "horizontal_input_wrapper_class", "horizontal_label_class", "horizontal_label_offset_class", "inherit_data", "invalid_message", "invalid_message_parameters", "label", "label_attr", "label_format", "label_render", "mapped", "method", "post_max_size_message", "property_path", "required", "sonata_admin", "sonata_field_description", "sonata_help", "translation_domain", "trim", "validation_groups".
  500 Internal Server Error - UndefinedOptionsException

How do I resolve this issue? 

A:

There are a lot of compatibility problems with symfony 3.1.4, option resolver is one of them .
I recommend to try 'formatter-bundle 4.x-dev', where it's fixed among other issues.
Also:
    form:
    resources:
        # ...
        - 'SonataFormatterBundle:Form:formatter.html.twig'

is deprecated and
    form_themes:    
        - 'SonataFormatterBundle:Form:formatter.html.twig'

should be used instead.

