如何从Symfony3中提交的表单中获取数据？

Question

I faced up with some non-ordinary situation for me.

1) I have a dependent list that rendering by Symfony FormType like this:

2) Location and Instruction fields are depend from Company field.

3) When I change Company field (onchange event js) then goes ajax request that retrieves data from the database and build a dropdown list.

4) But when form is submitted I have an error:

Please help me to resolve this. Thanks in advance.

My formType:

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('hours')
        ->add('messageText', null, ['required' => false])
        ->add('company', null, [
            'choice_label' => 'name',
            'placeholder' => 'Please select company',
            'required' => true
        ])
        ->add('procedure', TextType::class, ['attr' => ['placeholder' => 'Please type code or description'] ])
        ->add('instruction', ChoiceType::class, ['mapped' => false])
        ->add('location', ChoiceType::class, ['mapped' => false])

    ;
}

public function configureOptions(OptionsResolver $resolver)
{
    $resolver->setDefaults(array(
        'data_class' => InstructionNotification::class
    ));
}

Action from controller:

/**
 * @Route("/admin/api/instructions", name="admin_api_instructions")
 * @param Request $request
 * @return JsonResponse
 */
public function getInstructionsByCompanyId(Request $request)
{
    $id = $request->get('id');
    if (!$id) {
        return new JsonResponse('No data', 404);
    }

    $instructions = $this->getDoctrine()->getRepository('OctaneBundle:Instruction')->findInstructionsByCompanyId($id);

    return new JsonResponse($instructions);
}

findInstructionsByCompanyId($id):

public function findInstructionsByCompanyId($id)
{
    $qb = $this->createQueryBuilder('i');
    if ($id) {
        $qb
            ->where('i.company = :id')
            ->setParameter('id', $id);
    }

    return $qb->getQuery()->getResult();
}

response from api (i.e.: admin/api/instructions?id=1):

[{"id":2,"label":"First instruction"},{"id":3,"label":"First instruction"}]

If you need any additional information please leave comments below. Thanks

Answer 1

Thanks for the answer but I found out more elegant solution for my case. So,

my formType now:

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ...
        ->add('instruction', FormattedSelectType::class, ['class' => Instruction::class])
        ->add('location', FormattedSelectType::class, ['class' => Location::class])
    ;
}

FormattedSelectType:

class FormattedSelectType extends AbstractType
{
    /**
     * {@inheritdoc}
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'choice_label' => function (FormattedLabelInterface $entity) {
                return $entity->getFormattedLabel();
            }
        ));
    }

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

Etities Location and Instruction entities implement JsonSerializable and custom FormattedLabelInterface interface and have the next methods:

/**
 * @return string
 */
public function getFormattedLabel()
{
    return sprintf(self::LABEL_FORMATTED, $this->zip, $this->city, $this->name, $this->address, $this->phone);
}

/**
 * @return array|mixed
 */
public function jsonSerialize()
{
    return [
        'id' => $this->id,
        'label' => $this->getFormattedLabel()
    ];
}