Symfony2 -- Creating a form that use's differents entities - php

Question

I've been using Symfony a bit and i'm trying to figure out a way to create a form.
I need to use a MVC based solution.
My form needs to ask several information of different Entities and then i need to process that information extracting it in the database.
The database wont be a problem.
I was just figuring out how do i make a form with different types of entities ?
And how do i make a scrolldown menu with the data contained in the database for an entity ?

Answer 1

If the comment by #chalasr does not apply, i.e., the entities are not related, it is possible to do something like the following in a controller. Simply create a $form variable for each Entity{x}Type form as in:
$formA = $this->createForm(AppBundle\Entity\EntityAType($entityA));
$formB = $this->createForm(AppBundle\Entity\EntityBType($entityB));
...
return array(
'formA' => $formA->createView(),
'formB' => $formB->createView(),
...
);

Answer 2

You can simply combine the Forms while keeping each separate like so
namespace AppBundle\Form;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
class ReallyBigFormType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('foo', FooType::class, [
// label, required, ... as well as options of FooType
])
->add('bar', BarType::class, [
// label, required, ... as well as options of BarType
])
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([]);
}
}
and define FooType and BarType like a regular Form
namespace AppBundle\Form;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Form\Extension\Core\Type\TextType
class FooType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name', TextType::class, [
'label' => 'foo.name',
])
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => 'AppBundle\Entity\Foo',
]);
}
}