Symfony 3 - Best practice for concating form-blocks - php

Question

I'm trying to learn how to build forms in symfony 3.
Following some tutorials I have built a PersonType
class PersonType extends AbstractType {
public function buildForm(FormBuilderInterface $builder, array $options) {
$builder->add('gender', ChoiceType::class, array('label' => 'Anrede', 'choices' => array('Herr' => 'Herr', 'Frau' => 'Frau'), 'attr' => array('class' => 'form-control')))
->add('title', TextType::class, array('label' => 'Titel', 'attr' => array('class' => 'form-control')))
->add('firstname', TextType::class, array('label' => 'Vorname', 'attr' => array('class' => 'form-control')))
->add('lastname', TextType::class, array('label' => 'Nachname', 'attr' => array('class' => 'form-control')))
->add('birthdate', DateType::class, array('label' => 'Geburtsdatum', 'attr' => array('class' => 'form-control')))
->add('street', TextType::class, array('label' => 'Straße', 'attr' => array('class' => 'form-control')))
->add('streetnumber', TextType::class, array('label' => 'Hausnummer', 'attr' => array('class' => 'form-control')))
->add('zip', TextType::class, array('label' => 'PLZ', 'attr' => array('class' => 'form-control')))
->add('city', TextType::class, array('label' => 'Stadt', 'attr' => array('class' => 'form-control')))
->add('email', TextType::class, array('label' => 'E-Mail', 'attr' => array('class' => 'form-control')));
}
public function getName() {
return 'person';
}
}
And some other types.
In the controller I have
$person = new Person();
$form = $this->createForm(PersonType::class, $person);
My question now is, how do I now concat the PersonType to some other Types to get one Form out of it? And how do I then set the submit-button?

Answer 1

You cannot concatenate but you can include a subset of fields in several forms.
Here you have a nice example in the Symfony documentation :
http://symfony.com/doc/current/cookbook/form/inherit_data_option.html
Recap :
Create a form with your subfields, with the option 'inherit_data' => true.
Use it in another form as field.

Answer 2

First of all, please note how you add fields to PersonType form, because it will be exactly the same.
->add('email', TextType::class, array('label' => 'E-Mail', 'attr' => array('class' => 'form-control')));
What you do here is adding a subform TextType. It actually contains single field, but it's still a form.
The same way you can add PersonType to any other form. That would be something like:
->add('person', PersonType::class, array(/* some options if needed*/);
And how do I then set the submit-button?
As mentioned in Best Practices for Symfony Forms, I would suggest to add them in template, not to the form object.