Validation of embedded forms with Symfony2

Question

I have a Parents form embedded into another form Student containing the data of the parents of a student. I need to validate the embedded form, because in my code just makes the validation of another form.

StudentType.php

  //...
  ->add('responsible1', new ParentsType(),array('label' => 'Mother'))
  ->add('responsible2', new ParentsType(),array('label'=> 'Father'))

 /**
 * @param OptionsResolverInterface $resolver
 */
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
    $resolver->setDefaults(array(
        'data_class' => 'BackendBundle\Entity\Student'
    ));
}

Entity Parents

 //...
 /**
 * @ORM\OneToMany(targetEntity="Student", mappedBy="$responsible1")
 * @ORM\OneToMany(targetEntity="Student", mappedBy="$responsible2")
 */
 private $students;

Entity Student

 //...
 /**
 * 
 * @ORM\ManyToOne(targetEntity="Parents", inversedBy="students", cascade={"persist"})
 */
 private $responsible1;

/**
 * 
 * @ORM\ManyToOne(targetEntity="Parents", inversedBy="students", cascade={"persist"})
 */
 private $responsible2;

Using the following code in the controller I got the name and the error message of all invalid fields in the main form (Student), but I get get errors embedded forms (Parents), just get the name of the object (responsible1 or responsible2) and the message I get [object Object].

StudentController.php

protected function getErrorMessages(\Symfony\Component\Form\Form $form) 
{
    $errors = array();

    foreach ($form->getErrors() as $key => $error) {
        $errors[] = $error->getMessage();
    }

    foreach ($form->all() as $child) {
        if (!$child->isValid()) {
            $errors[$child->getName()] = $this->getErrorMessages($child);
        }
    }

    return $errors;
}
/**
 * Creates a new Student entity.
 *
 */
public function createAction(Request $request)
{
// if request is XmlHttpRequest (AJAX) but not a POSt, throw an exception
if ($request->isXmlHttpRequest() && !$request->isMethod('POST')) {
    throw new HttpException('XMLHttpRequests/AJAX calls must be POSTed');
}

    $entity = new Student();
    $form = $this->createCreateForm($entity);
    $form->handleRequest($request);

    if ($form->isValid()) {

        $em = $this->getDoctrine()->getManager();
        $em->persist($entity);
        $em->flush();

        if ($request->isXmlHttpRequest()) {
        return new JsonResponse(array('message' => 'Success!'), 200);
    }

        return $this->redirect($this->generateUrl('student_show', array('id' => $entity->getId())));
    }

     if ($request->isMethod('POST')) {
                    return new JsonResponse(array(
        'result' => 0,
        'message' => 'Invalid form',
        'data' => $this->getErrorMessages($form)),400);
    }

    return $this->render('BackendBundle:Student:new.html.twig', array(
        'entity' => $entity,
        'form'   => $form->createView(),
    ));
}

I tried the above code with the function getErrorsAsString() for errors in a string and so if they appear all, so I guess I'll have to add something in the above code to validate objects when "responsible1" or "responsible2" validate all fields.

I need to get all those errors are invalid fields on both forms.I read something to add 'cascade_validation' => true , validation_group or @Assert\Valid() by the code, but I tried and I failed to get it. If someone can explain to me a little worth those, I thank you because I'm new to all this.

are you looking for a way to flattern error messages including nested forms ? — b.b3rn4rd
– b.b3rn4rd, Commented Dec 6, 2015 at 21:45
Hi @b.b3rn4rd, what I need is to validate a form and return with a JsonResponse an Ajax call and then indicate invalid form fields without refreshing the screen. This was a solution but I can not get the errors of the embedded forms. — Joseph
– Joseph, Commented Dec 6, 2015 at 21:53
makes sense, I was doing similar thing for ajax validation, posted a solution that works for me — b.b3rn4rd
– b.b3rn4rd, Commented Dec 6, 2015 at 22:00

b.b3rn4rd · Accepted Answer · 2015-12-06 21:58:24Z

2

Following example flatterns form and subform errors into assoc array, let me know if this is what you are trying to achieve

<?php
namespace Example\Bundle\UtilityBundle\Form;
use Symfony\Component\Form\Form;
class FormErrors
{
    public function getArray(Form $form, $style = 'KO')
    {
        $method = sprintf('get%sErrors', $style);

        $messages = $this->$method($form->all());

        return $messages;
    }

    private function getKOErrors(Form $children)
    {
        $errors = array();

        /* @var $child \Symfony\Component\Form\Form */
        foreach ($children as $child) {
            $type = $child->getConfig()->getType()->getName();
            if ($child->count()  && ($type !== 'choice')) {
                $childErrors = $this->getKOErrors($child->all());
                if (sizeof($childErrors)) {
                    $errors = array_merge($errors, $childErrors);
                }
            } else {
                if (!$child->isValid()) {
                    // I need only one error message per field 
                    $errors[$child->getName()] = $child->getErrors()->current()->getMessage();
                }
            }
        }

        return $errors;
    }
}

answered Dec 6, 2015 at 21:58

b.b3rn4rd

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4 Comments

Joseph Over a year ago

Hi @b.b3rn4rd ,With your code I could get errors of the form was missing, but in my case, the form is embedded in the main twice. For me understand I have a student registration form and within me appears a registration form from the father and other data of the mother (both are of the same type). And what if I get any field is invalid both forms are the first fields.You need to somehow differentiate the errors obtained, for example responsible1_name or responsible2_name. I hope I explained well and thank you for your answer.

b.b3rn4rd Over a year ago

@Joseph, just add a second param $name to getKOErrors(Form $children, $name) and concatenate $errors[$name.'_'.$child->getName() ] and don't forget to pass it ->getName() when calling

Joseph Over a year ago

now everything works perfect, I believe that what I needed was to differentiate them, thank you very much, helped me a great help.

b.b3rn4rd Over a year ago

No worries, glad it helped

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