The extended type specified for the service "sonata.admin.form.extension.field" does not match the actual extended type. Expected "Symfony\Component\Form\Extension\Core\Type\FormType", given "form"

[rafrsr]

After update a project (with sonata 2.4@dev) to symfony 2.8 got this error

The extended type specified for the service "sonata.admin.form.extension.field" does not match the actual extended type. 
Expected "Symfony\Component\Form\Extension\Core\Type\FormType", given "form"

I cannot open any admin page.

Looking for information about symfony changes, I found this:

Type names were deprecated and will be removed in Symfony 3.0. Instead of referencing types by name, you should reference them by their fully-qualified class name (FQCN) instead. With PHP 5.5 or later, you can use the "class" constant for that:

All sonata fields throw this exception with SF2.8+.

For example Form/Extension/Field/Type/FormTypeFieldExtension.php has the following (not compatible with SF2.8+) statement .

    public function getExtendedType()
    {
        return 'form';
    }

The proposed trick to keep compatibility backward should be something like:

PHP 5.5+

public function getExtendedType()
   {
       return method_exists(AbstractType::class, 'getBlockPrefix') ? FormType::class : 'form';
   }

or (for all PHP versions)

    public function getExtendedType()
    {
        return method_exists('Symfony\Component\Form\AbstractType', 'getBlockPrefix')
            ? 'Symfony\Component\Form\Extension\Core\Type\FormType'
            : 'form' // SF <2.8
            ;
    }

[featuriz]

Me too facing the same problem. I'm using Symfony 2.8.1 . In development environment it works fine. But in production environment it throws error.

The extended type specified for the service "sonata.admin.form.extension.field" does not match the actual extended type. Expected "Symfony\Component\Form\Extension\Core\Type\FormType", given "form".

I'm not dealing with backend interface (not with sonata). This error throws on a simple contact form. My code.

/**
     * @Route("/contact", name="fz_contact")
     */
    public function contactAction(Request $request) {
        $em = $this->getDoctrine()->getManager();
        $cnt = $this->getDoctrine()->getRepository('AppBundle:FZPage')->findOneBy(['page' => 'fz_contact']);
        $entity = new \AppBundle\Entity\FZContact();
        $form = $this->createForm(FZContactType::class, $entity);
        $form->handleRequest($request);
        if ($form->isSubmitted() && $form->isValid()) {
            $entity->setCip($request->getClientIp());
            $entity->setCbrowser($request->server->get('HTTP_USER_AGENT'));
            $myMailer = $this->get('fz_app.fe.mail.contact');
            $result = $myMailer->sendMail($entity, $request->getClientIp(), $request->server->get('HTTP_USER_AGENT'));
            $this->flashMSG($result, 'contact');
            $em->persist($entity);
            $em->flush();
            return $this->redirect($this->generateUrl('fz_home'));
        }
        $x = ['cmf' => $cnt, 'pTitle' => 'Contact us'];
        return $this->render('frontend/show/index.html.twig', ['x' => $x, 'entity' => $entity, 'form' => $form->createView()]);
    }

Form

<?php

namespace AppBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Form\Extension\Core\Type\TextareaType;

class FZContactType extends AbstractType {

    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options) {
        $builder
                ->add('name', null, ['attr' => ['class' => 'form-control', 'placeholder' => 'Your name']])
                ->add('email', null, ['attr' => ['class' => 'form-control', 'placeholder' => 'Your email id']])
                ->add('phone', null, ['attr' => ['class' => 'form-control', 'placeholder' => 'Your contact phone number']])
                ->add('message', TextareaType::class, ['attr' => ['class' => 'form-control', 'placeholder' => 'The information to be sent']])
        ;
    }

    /**
     * @param OptionsResolver $resolver
     */
    public function configureOptions(OptionsResolver $resolver) {
        $resolver->setDefaults(array(
            'data_class' => 'AppBundle\Entity\FZContact'
        ));
    }

}

I have some knowledge in Symfony. I'm using symfony form 1.2 . But i'm not expert in Symfony Core.

I updated my code as per * rafrsr commented on 8 Dec 2015 * , then i get the following error...

The extended type specified for the service "sonata.admin.form.extension.field.mopa" does not match the actual extended type. Expected "Symfony\Component\Form\Extension\Core\Type\FormType", given "form".

[soullivaneuh]

What is you version sonata-project/core-bundle?

This should be resolved by this: https://sonata-project.org/bundles/core/master/doc/reference/form_types.html#symfony3-supports

[greg0ire]

Sonata 2.4 does not exist anymore, reopen if you still have the bug with Sonata 3.

[BenjaminBeck]

I do still get this error using sonata-project/admin-bundle / 3.9 and symfony 3.1.6.

The exact error message is: The extended type specified for the service "sonata.admin.form.extension.field.mopa" does not match the actual extended type. Expected "Symfony\Component\Form\Extension\Core\Type\FormType", given "form".

In the code of Sonata\AdminBundle\Form\Extension\Field\Type\MopaCompatibilityTypeFieldExtension i found that getExtendedType just does return 'form';. ( https://github.com/sonata-project/SonataAdminBundle/blob/3.9.0/Form/Extension/Field/Type/MopaCompatibilityTypeFieldExtension.php#L69 )

Did i forget to configure something or is this still a bug?

[greg0ire]

The line you're linking to should read return Symfony\Component\Form\Extension\Core\Type\FormType when symfony >=2.8 is in use. Can you make a PR?

[BenjaminBeck]

I am not confident that changing that line is correct. Here is another Example: https://github.com/sonata-project/SonataAdminBundle/blob/3.9.0/Form/Extension/ChoiceTypeExtension.php#L67

I got it running without exception - my error was, that i only registered SonataAdminBundle. After also registering the other bundles the error is gone.

There seems to be a additional config/mapping for the form types: https://github.com/sonata-project/SonataAdminBundle/blob/3.9.0/Resources/config/form_types.xml#L37

I think this is related, but dont know how ..

[greg0ire]

I am not confident that changing that line is correct.

You could just try, maybe ?

After also registering the other bundles the error is gone.

Closing this again then.

[BenjaminBeck]

I tried, but then there was the same exception with the ChoiceType..

[greg0ire]

Then maybe it needs to be changed too?

[BenjaminBeck]

Yes - but i am really not so deep into symfony and the config system.. I dont feel like i should make a PR. Maybe this could be some kind of backward compatibility thing for symfony 2.x ..

[greg0ire]

Ok, drop it then… someone else will surely fix this… surely.