Silex Framework集合表单类型 - Silex Framework Collection form type

Silex Framework Collection form type

我对集合表单类型有问题。我的实体：

用户

use Doctrine'Common'Collections'ArrayCollection;
/**
  * @OneToMany(targetEntity="Comment", mappedBy="user")
  */
protected $comments;
public function __construct() {
$this->comments= new ArrayCollection();
}

注释

/**
  * @ManyToOne(targetEntity="User", inversedBy="comments")
  * @JoinColumn(name="user_id", referencedColumnName="id")
  **/
protected $user;

Formbuilder:

$form = $silex['form.factory']->createBuilder('form', $user)
                ->add('comments', 'collection', array(
                    'type'   => 'text',
                    'options'  => array(
                        'required'  => false,
                        'data_class' => 'Site'Entity'Comment'
                    ),
                ))
                ->getForm();

并返回错误：

Catchable fatal error: Object of class Site'Entity'Comment could not be converted to string in C:'XXX'vendor'twig'twig'lib'Twig'Environment.php(331) : eval()'d code on line 307 Call Stack

我认为您可能很难在这里使用文本类型的集合字段，因为您想要的字段是复杂实体的集合，而不仅仅是字符串数组。

我建议为评论实体添加一个新的表单类型：

use Symfony'Component'Form'AbstractType;
use Symfony'Component'Form'FormBuilderInterface;
class CommentType extends AbstractType {
    public function buildForm(FormBuilderInterface $builder, array $options) {
        $builder->add('text', 'text', array());
    }
    public function getName() {
        return 'comment';
    }
    public function getDefaultOptions(array $options) {
        return array(
            'data_class' => 'Site'Entity'Comment'
        );
    }
}

然后在原始Formbuilder中，引用此类型：

$form = $silex['form.factory']->createBuilder('form', $user)
    ->add('comments', 'collection', array(
        'type'   => new CommentType(),
        'options'  => array(
            'required'  => false,
            'data_class' => 'Site'Entity'Comment'
            'allow_add' => true,
            'allow_delete' => true
        ),
    ))
    ->getForm();