Hello! I'm trying to use one Form for both "Add" and "Edit" Post pages. According to this docs page I use a Posts model to set default values in the form’s elements. Sadly something went wrong with Select element.

BlogPostConroller (EditAction):

  $form = new Form($post);

Form:

class AddBlogPostForm extends Form
{

public function initialize(\Project\Models\BlogPosts $post = null)
{


    $title = new Text('title', [
        'placeholder' => 'title'
    ]);

    $title->setLabel('Title of the post');

    $title->addValidators([
        new PresenceOf([
            'message' => 'no title'
        ]),
        new StringLength([
            'min' => 12,
            'messageMinimum' => 'Very short title'
        ]),
    ]);

    $title->setFilters(['trim', 'string']);

    $this->add($title);

    $select = new Select("type", BlogTypes::find(),
            [
                "using" => [
                    "id",
                    "name",
                ]
            ]
        );

     $select->addValidator(new PresenceOf([
            'message' => ' Choose the post type'
        ]));

     $this->add($select);

    $this->add(new Submit('Add'));
    }

}

I'm getting Catchable fatal error: Object of class Project\Models\BlogTypes could not be converted to string in \app\cache\volt\appviewsblogpostedit.volt.php on line 19 which referrences to

$this->form->render('type')

How does Form + entity interact with Select Element? How to solve my issue?