Symfony 2 embedded forms ArrayCollection error - php

Question

I have to create a multilingual table so i choose this schema:
Article ( id, name_translation_fk)
Translation ( id )
Translation_Text (id, language, translation_fk, text)
Now i need to add names in different languages for an article that allready exists.
Doctrine gives me this error:
Catchable Fatal Error: Argument 1 passed to Doctrine\Common\Collections\ArrayCollection::__construct() must be an array, object given, called in */vendor/doctrine/lib/Doctrine/ORM/UnitOfWork.php on line 416 and defined in */vendor/doctrine-common/lib/Doctrine/Common/Collections/ArrayCollection.php line 46
I have no clue what the problem could be since all the entities are well declared.I think the issue is somewhere in the Form Class.
I have posted below my entities, forms and views implicated.
Article
class Article
{
/**
* #ORM\ManyToOne(targetEntity="Translation", inversedBy="article_name", cascade= {"persist"})
* #ORM\JoinColumn(name ="name", referencedColumnName="id")
*/
protected $name;
}
Translation
class Translation
{
/**
* #ORM\OneToMany(targetEntity="Translation_Text", mappedBy="translation", cascade={"persist"})
*/
public $translation_text;
/**
* #ORM\OneToMany(targetEntity="Article", mappedBy="name", cascade={"persist"})
*/
protected $article_name;
public function __construct()
{
$this->translation_text = new ArrayCollection();
$this->article_name = new ArrayCollection();
}
}
Translation_Text
class Translation_Text
{
/**
* #ORM\ManyToOne(targetEntity="Language", inversedBy="translation_text")
* #ORM\JoinColumn(name ="language_id", referencedColumnName="id")
*/
protected $language;
/**
* #ORM\ManyToOne(targetEntity="Translation", inversedBy="translation_text")
* #ORM\JoinColumn(name ="translation_id", referencedColumnName="id")
*/
protected $translation;
}
The form
class TranslationTextType extends AbstractType
{
public function buildForm(FormBuilder $builder, array $options)
{
$builder->add('text','text');
}
public function getDefaultOptions(array $options)
{
return array(
'data_class' => 'Udo\WebserviceBundle\Entity\Translation_Text',
);
}
public function getName()
{
return 'translation_text';
}
}
class TranslationType extends AbstractType
{
public function buildForm(FormBuilder $builder, array $options)
{
$builder->add('translation_text',new TranslationTextType());
}
public function getDefaultOptions(array $options)
{
return array(
'data_class' => 'Udo\WebserviceBundle\Entity\Translation',
);
}
public function getName()
{
return 'translation';
}
}
class ArticleTranslationForm extends AbstractType
{
public function buildForm(FormBuilder $builder, array $options)
{
$builder->add('name',new TranslationType());
}
public function getDefaultOptions(array $options)
{
return array(
'data_class' => 'Udo\WebserviceBundle\Entity\Article',
);
}
public function getName()
{
return 'article';
}
}
The controller
$article = $em->getRepository('Udo\WebserviceBundle\Entity\Article')->find($id);
$form = $this->createForm(new ArticleTranslationForm(),$article);
The form view
<form action="{{path('article_translate', { 'id': entity.id }) }}" method="post" {{ form_enctype(form) }}>
{{form_row(form.name.translation_text.text)}}
{{form_rest(form)}}
<input type="submit" />
</form>

Answer 1

Since it is a ont-to-many relationship, you should use collection:
$builder->add('translation_text', 'collection', array('type' => new TranslationTextType()));
instead of:
$builder->add('translation_text',new TranslationTextType());