Collection of subforms in Symfony - php

Question

I have following form in Symfony 2.8:
$form = $this->createFormBuilder()
->add('name', 'text')
->add('email', 'text')
->add('phone', 'text')
->add($this->createFormBuilder()
->create('address', 'form', array('virtual' => true))
->add('street', 'text')
->add('city', 'text')
->add('zip', 'text')
)
->getForm();
And I would like to dynamically add addresses in JS. I can add by CollectionType single input, as per following documentation: https://symfony.com/doc/current/reference/forms/types/collection.html
But I would like to add whole subform address. So I would like to achieve following HTML result:
<input name="form[address][0][street]" />
<input name="form[address][0][city]" />
<input name="form[address][0][zip]" />
not
<input name="form[address][street][0]" />
<input name="form[address][city][0]" />
<input name="form[address][zip][0]" />
Can anybody help? Thanks!

Answer 1

thanks to the comments I solved in in following way:
class Address
{
private $street;
private $city;
public function getStreet()
{
return $this->street;
}
public function setStreet($street)
{
$this->street = $street;
}
public function getCity()
{
return $this->city;
}
public function setCity($city)
{
$this->street = $city;
}
}
class AddressType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('street', 'text')
->add('city', 'text');
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => Address::class,
));
}
}
then in controller:
$data = array(
"addresses" => array(
0 => new Address())
);
// $data is to show first empty subform
$form = $this->createFormBuilder($data)
->add('name', 'text')
->add('email', 'text')
->add('phone', 'text')
->add('addresses',
CollectionType::class,
array(
'entry_type' => AddressType::class,
'empty_data' => true
))
->getForm();
and the twig template looks like this:
{{ form_start(form) }}
{{ form_label(form.name) }}
{{ form_widget(form.name) }}
{{ form_label(form.email) }}
{{ form_widget(form.email) }}
{% for address in form.addresses %}
{{ form_widget(address) }}
{% endfor %}
{{ form_end(form) }}