Extend Doctrine2 form EntityType

Question

I'm looking for a way to extend Symfony 2 EntityType

Symfony\Bridge\Doctrine\Form\Type\EntityType

as in a new type extending this one, not creating a FormTypeExtension - and I can't figure it out. Does anyone know any proper way to do that?

I've tried simply extending it that way:

class NestedEntityType extends EntityType {

    public function getName() {
        return $this->getBlockPrefix();
    }

    public function getBlockPrefix() {
        return 'nested_entity';
    }
}

and then in sonata admin class I have:

protected function configureFormFields(FormMapper $formMapper)
{
    $formMapper->add('types', NestedEntityType::class, [
        'label' => false,
        'multiple' => true,
        'expanded' => true,
        'by_reference' => false
    ]);
}

but unfortunately it causes Fatal Error:

Catchable Fatal Error: Argument 1 passed to Symfony\Bridge\Doctrine\Form\Type\DoctrineType::__construct() must implement interface Doctrine\Common\Persistence\ManagerRegistry, none given, called in

I need to keep the whole functionality of EntityType, with one exception - the way it's presented. That's why I need to extend this type (I use it in other fields, so I can't just modify the template for it!).

I'm using Symfony 2.8 (just for the record).

score 9 · Answer 1 · answered Sep 15 '16 at 13:45

9

You should not extend it directly but use parent option

/**
 * {@inheritdoc}
 */
public function getParent()
{
    return EntityType::class;
}

So something like

class NestedEntityType extends AbstractType 
{

    public function getName() 
    {
        return $this->getBlockPrefix();
    }

    public function getBlockPrefix() 
    {
        return 'nested_entity';
    }

    /**
     * {@inheritdoc}
     */
    public function getParent()
    {
        return EntityType::class;
    }
}

That way if FormType you're extending from has something in injected (or setted) into constructor, you don't need to care as symfony will do it for you.

answered Sep 15 '16 at 13:45

DonCallisto

29,419
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100

`The required option "class" is missing. ` - I can only assume this has something to do with Sonata, not Symfony2 itself? – pzaj Sep 15 '16 at 13:56
1

@user1970395 it has something to do with the form where you are using `NestedEntityType`. Resolution: you need to pass, as an option, the class of entity you're using that form type on. – DonCallisto Sep 15 '16 at 13:57
Thank you for your help! I'd love to mark both answers as accepted, but Dmitry's covers the question more deeply, so I will mark his answer! :) Hope you don't mind. – pzaj Sep 15 '16 at 14:19
@user1970395 mark what you think is the best one to help community: we are here to help and be helped, not to gain reputation ;) – DonCallisto Sep 15 '16 at 14:20

Dmitry Malyshenko · Answer 2 · 2016-09-15T13:51:05.507

1

If you would go to EntityType, you'll see it's extending DoctrineType and needs dependencies in constructor -

public function __construct(ManagerRegistry $registry, PropertyAccessorInterface $propertyAccessor = null)
{
    $this->registry = $registry;
    $this->propertyAccessor = $propertyAccessor ?: PropertyAccess::createPropertyAccessor();
}

So, your class NestedEntityType uses the same constructor and needs the same dependencies.

Actually, what you need is

class NestedEntityType extends AbstractType {

    public function getParent() {
        return EntityType::class;
    } 

    public function getName() {
        return $this->getBlockPrefix();
    } 

    public function getBlockPrefix() {
        return 'nested_entity';
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'class' => YourEntity::class
        ]);
    }
}

UPD: Of course you need configure options, according to EntityType doc. See method I've added to code.

edited Sep 15 '16 at 13:51

answered Sep 15 '16 at 13:44

Dmitry Malyshenko

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You have a typo in `AbstractType`! Also thank you, it does push me forward, unfortunately I'm now getting: `The required option "class" is missing.`, thus it's not 1:1 extension of EntityType, because I still need some additional stuff there to make it work ;> I took an approach of passing arguments to constructor, but unfortunately I can't find any matching services to pass as arguments, any chance you'd know what should I put in service definition to make it work? – pzaj Sep 15 '16 at 13:49
Of course, you need option `class`. See updated answer. – Dmitry Malyshenko Sep 15 '16 at 13:56
Ah, right :> And I believe it's being passed automagically by Sonata to EntityType? – pzaj Sep 15 '16 at 13:57
Can I pass a trait there? I wanted to use Gedmo NestedTree here. – pzaj Sep 15 '16 at 14:02
by Symfony, to be precise. – Dmitry Malyshenko Sep 15 '16 at 14:03
Do you mean if the value of 'class' may be a trait? No, it may not. Only a valid Entity. It's used to recieve an EntityRepository. Explain, what do you want to archive. Maybe, you're going by wrong road. – Dmitry Malyshenko Sep 15 '16 at 14:05
Alright... so, to explain it briefly. I want to create a FormType working exactly like EntityType, but I need its extended and multiple variant to be presented in a different way - I need "nested" checkboxes - for Entity that can be nested using Gedmo's `NestedTree` - instead of just a list of checkboxes. Nested as in multilevel unordered lists of checkboxes :) Perhaps you know how does the Symfony automagically set the `class` option? – pzaj Sep 15 '16 at 14:07

score 1 · Accepted Answer · answered Sep 15 '16 at 14:14

1

So, if you need a create a reusable solution, for different Entities, you don't need a configureOptions in this case.

You need to create an elementType in you code like

$this->createForm(NestedEntityType::class, null, ['class' => YourEntity::class]);

And in this case, you will need to pass as an option a name of class Entity which is nested.

answered Sep 15 '16 at 14:14

Dmitry Malyshenko

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1
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No way Sonata / Symfony could do this automatically like it does for EntityType? Well, I think I can live with that, if there's no other way :) – pzaj Sep 15 '16 at 14:17
I think it's possible. It's Symfony after all. But you need to dig deep into the code and understand completely first, how it's working with EntityType – Dmitry Malyshenko Sep 15 '16 at 14:19
That's what I assumed, well, for now I can live with `class` option. Thank you for your support! – pzaj Sep 15 '16 at 14:22

Extend Doctrine2 form EntityType

3 Answers3