Experimental Form

Controller.php

<?php

public function someAction()
{
    $factory = $this->get('form.factory');
    $form = $factory->create(new ExperimentalForm(), 'form');
    $request = $this->get('request');

    if ($request->getMethod() === 'POST') {
        $form->bindRequest($request);
        if ($form->isValid()) {
            return new RedirectResponse($this->generateUrl('homepage'));
        } 
    }

    return $this->render('MyBundle:Campaign:test.html.php', array(
        'form' => $factory->createRenderer($form, 'php'),
    ));
}

ExperimentalForm.php

<?php

namespace My\Company\Form;

use Symfony\Component\Form\Type\AbstractType;
use Symfony\Component\Form\FormBuilder;

class ExperimentalForm extends AbstractType
{
    public function buildForm(FormBuilder $builder, array $options)
    {
        $builder->add('fields', 'collection', array(
            'modifiable' => true,
            'type' => new ExperimentalFormType()
        ));
    }
}

ExperimentalFormType.php

<?php

namespace My\Company\Form;

use Symfony\Component\Form\Type\AbstractType;
use Symfony\Component\Form\FormBuilder;

class ExperimentalFormType extends AbstractType
{
    public function buildForm(FormBuilder $builder, array $options)
    {
        $builder
            ->add('field', 'text')
            ->add('secondField', 'text');
    }

    public function getDefaultOptions(array $options)
    {
        return array(
            'data_class' => 'My\Company\Entity\Field'
        );
    }
}

Field.php

<?php

namespace My\Company\Entity;

class Field
{
    /**
     * @assert:NotBlank()
     * @assert:Min(2)
     */
    private $field;
    
    /**
     * @assert:NotBlank()
     * @assert:Min(2)
     */
    private $secondField;    

    public function getField()
    {
        return $this->field;
    }

    public function setField($field)
    {
        $this->field = $field;
    }

    public function getSecondField()
    {
        return $this->secondField;
    }

    public function setSecondField($field)
    {
        $this->secondField = $field;
    }
}