Form values is empty (not value) after render the widget on a form

问题

I've this Form:

OrdersType

class OrdersType extends AbstractType {
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        // Others $builder fields goes here
        if ($this->register_type[0] == "natural")
        {
            $builder->add('person', new NaturalPersonType(), array('label' => FALSE));
        }
        elseif ($this->register_type[0] == "legal")
        {
            $builder->add('person', new LegalPersonType(), array('label' => FALSE));
        }
    }
}

PersonType

class PersonType extends AbstractType {
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
                ->add('description', 'text', array(
                    'required' => TRUE,
                    'label' => FALSE
                ))
                ->add('contact_person', 'text', array(
                    'required' => FALSE,
                    'label' => 'Persona de Contacto'
        ));
    }
}

This is what I'm doing in the controller:

public function editAction($id = null)
{
    $em = $this->getDoctrine()->getManager();
    $order = $em->getRepository('FrontendBundle:Orders')->find($id);
    $type = $order->getPerson()->getPersonType() === 1 ? "natural" : "legal";

    $orderForm = $this->createForm(new OrdersType(array($type)), $order, array(
        'action' => $this->generateUrl('update-order', array('id' => $id)),
        'method' => 'POST',
        ));

    return  array(
        'entity' => $order,
        "form" => $orderForm->createView(),
        'id' => $id
    );
}

Then in my view I'm rendering fields as follow:

{{ form_widget(form.person.person.description) }}

The code renders the field right but without values and yes, it has values, where is the error? This are the others Forms I'm using:

LegalPersonType

class LegalPersonType extends AbstractType {

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
                ->add('rif', 'text', array(
                    'required' => true,
                    'label' => false,
                    'attr' => array(
                        'maxlength' => 10,
                    ))
                )
                ->add('identification_type', 'choice', array(
                    'label' => FALSE,
                    'choices' => RifType::getChoices(),
                    'attr' => array(
                        'class' => 'toSelect2'
                    )
                ))
                ->add('person', new PersonType(), array('label' => FALSE));
    }
}

Working on mapping

PersonType

class PersonType extends AbstractType {
    ....
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'Tanane\FrontendBundle\Entity\Person',
            'inherit_data' => true
        ));
    }

    public function getName()
    {
        return 'person';
    }
}

NaturalPersonType

class NaturalPersonType extends AbstractType {

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        parent::buildForm($builder, $options);

        $builder
                ->add('identification_type', 'choice', array(
                    'label' => 'Número de Cédula',
                    'choices' => CIType::getChoices()
                ))
                ->add('ci', 'number', array(
                    'required' => true,
                    'label' => false,
                    'attr' => array(
                        'maxlength' => 8,
                    ))
                )
                ->add('person', new PersonType(), array(
                    'label' => FALSE,
                    'data_class' => 'Tanane\FrontendBundle\Entity\NaturalPerson'
        ));
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'Tanane\FrontendBundle\Entity\NaturalPerson'
        ));
    }

    public function getName()
    {
        return 'natural_person';
    }
}

If I remove the setDefaultOptions method from NaturalPersonType I get this error:

The form's view data is expected to be of type scalar, array or an instance of \ArrayAccess, but is an instance of class Tanane\FrontendBundle\Entity\NaturalPerson. You can avoid this error by setting the "data_class" option to "Tanane\FrontendBundle\Entity\NaturalPerson" or by adding a view transformer that transforms an instance of class Tanane\FrontendBundle\Entity\NaturalPerson to scalar, array or an instance of \ArrayAccess.

If I leave as it's I get this other:

Method "description" for object "Symfony\Component\Form\FormView" does not exist in /var/www/html/tanane/src/Tanane/BackendBundle/Resources/views/Order/edit.html.twig at line 134

回答1:

It looks like PersonType is not being mapped correctly to your entity.

Since it's being used both by LegalPersonType and NaturalPersonType to handle some of their properties, I would define it as parent of those two. This can be achieved by using the inherit_data option (documentation).

Your code would look something like this:

PersonType

class PersonType extends AbstractType {
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
                ->add('description', 'text', array(
                    'required' => TRUE,
                    'label' => FALSE
                ))
                ->add('contact_person', 'text', array(
                    'required' => FALSE,
                    'label' => 'Persona de Contacto'
        ));
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'inherit_data' => true,
        ));
    }
}

Note that you should remove the data_class option from setDefaultOptions().

LegalPersonType

class LegalPersonType extends AbstractType {

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
                ->add('rif', 'text', array(
                    'required' => true,
                    'label' => false,
                    'attr' => array(
                        'maxlength' => 10,
                    ))
                )
                ->add('identification_type', 'choice', array(
                    'label' => FALSE,
                    'choices' => RifType::getChoices(),
                    'attr' => array(
                        'class' => 'toSelect2'
                    )
                ))
                ->add('data', new PersonType(), array(
                    'label'      => FALSE,
                    'data_class' => 'YourBundle\Entity\LegalPerson',
                ));
    }
}

Your NaturalPersonType would look similar to LegalPersonType.

Now, you can do this in your view:

{{ form_widget(form.person.data.description) }}

来源：https://stackoverflow.com/questions/25837475/form-values-is-empty-not-value-after-render-the-widget-on-a-form