Same Table, Two entities (or class) in symfony - forms

Question

I'd like to build two class that refer to the same table.
For example:
Table Invoice:
idInvoice, IdClient, idProduct.
I've got one entity that shows general information (idClient and idInvoice) and than I've got an entity that allows me to show a dynamically generated form (id Product).
For every invoice I need one or more product so I should be able to insert different row for different product.
How can I link this different entities on the same table?
When I submit the form I need to extract all data from Product information and all data from Client and then I need to insert on MySQL.
I have got ORDER TABLE and PRODUCT TABLE. They are in a one to many relationship (one order, more product.) I created two entities: Order and Product and these are the classes:
ORDER CLASS
namespace AppBundle\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity
* #ORM\Table(name="ordini")
*/
class Ordine
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $idOrdine;
/**
*
* #ORM\OnetoMany(targetEntity="Prodotto", cascade={"persist"},
mappedBy="prodotto")
*
*/
protected $prodotti;
/**
* Get idOrdine
*
* #return integer
*/
public function getIdOrdine()
{
return $this->idOrdine;
}
public function __costruct()
{
$this->prodotti= new ArrayCollection();
}
public function setProdotti(ArrayCollection $prodotti)
{
$this->prodotti = $prodotti;
//return $this;
}
public function addProdotti(Prodotto $prod) {
$this->prodotti[] = $prod;
return $this;
}
public function addProdotto(Prodotto $prodotto) {
$this->prodotti[] = $prodotto;
$prodotto->setOrdine($this);
return $this;
}
public function getProdotti() {
return $this->prodotti;
}
}
PRODUCT CLASS
namespace AppBundle\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity
* #ORM\Table(name="prodotto")
*/
class Prodotto
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $idProdotto;
/**
* #ORM\Column(type="string", length=100, nullable=TRUE)
*
*/
protected $modello;
/**
* #ORM\ManyToOne(targetEntity="Ordine", inversedBy="prodotti")
* #var AppBundle\Entity\Ordine
*/
protected $ordini;
/**
* Get idProdotto
*
* #return integer
*/
public function getIdProdotto()
{
return $this->idProdotto;
}
/**
* Set modello
*
* #param string $modello
* #return Prodotto
*/
public function setModello($modello)
{
$this->modello = $modello;
return $this;
}
/**
* Get modello
*
* #return string
*/
public function getModello()
{
return $this->modello;
}
}
Then I created a Form that allows me to create an order (invoice) and I can dynamically generate Product Field.
I should be on the right way but now it gives me an error:
Expected argument of type "Doctrine\Common\Collections\ArrayCollection",
"array" given
My OrderForm is:
namespace AppBundle\Form\Documentofiscale;
use Symfony\Component\Form\TextField;
use Symfony\Component\Form\Checkbox;
use Symfony\Component\Form\Extension\Core\Type\CollectionType;
use AppBundle\Entity\Prodotto;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
class FormDocumentoFiscale extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
// $builder->add('idCliente');
//$builder->add('save', 'submit', array('label' => 'INSERISCI
DOCUMENTO'));
$builder->add('prodotti', 'collection', array(
'type' => new FormAggiuntaProdotti(),
'allow_add' => true,
'by_reference' => false,
)
);
$builder->add('save', 'submit', array('label' => 'INSERISCI
DOCUMENTO'));
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'AppBundle\Entity\Ordine',
));
}
public function getName()
{
return 'documento';
}
}
And my dynamically generated Form is:
namespace AppBundle\Form\Documentofiscale;
use Symfony\Component\Form\TextField;
use Symfony\Component\Form\Checkbox;
use Symfony\Component\Form\Extension\Core\Type\CollectionType;
use AppBundle\Entity\Prodotto;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
class FormAggiuntaProdotti extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('modello');
//// $builder->add('idCliente');
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'AppBundle\Entity\Prodotto',
));
}
public function getName()
{
return 'prodotto';
}
}