Symfony 4 formbuilder loop each rows from database table - arrays

Question

I have 2 entities :
Recettes
Categories
I try to build/list a form based on each rows of the table "Recettes" and display it from a controller.
Any ideas?
=======================
FORM_START
Name1 (TypeText) | Category (ChoiceType)
Name2 (TypeText) | Category (ChoiceType)
Name3 (TypeText) | Category (ChoiceType)
[Submit button]
FORM_END
=======================
Entity RECETTES
<?php
namespace App\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Recettes
*
* #ORM\Table(name="recettes", indexes={#ORM\Index(name="categorie", columns={"categorie"})})
* #ORM\Entity
*/
class Recettes
{
/**
* #var int
*
* #ORM\Column(name="id", type="integer", nullable=false)
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="nom", type="string", length=50, nullable=false)
*/
private $nom;
/**
* #var \Categories
*
* #ORM\ManyToOne(targetEntity="Categories")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="categorie", referencedColumnName="id")
* })
*/
private $categorie;
public function getId(): ?int
{
return $this->id;
}
public function getNom(): ?string
{
return $this->nom;
}
public function setNom(string $nom): self
{
$this->nom = $nom;
return $this;
}
public function getCategorie(): ?Categories
{
return $this->categorie;
}
public function setCategorie(?Categories $categorie): self
{
$this->categorie = $categorie;
return $this;
}
}
Entity CATEGORIES
<?php
namespace App\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Categories
*
* #ORM\Table(name="categories")
* #ORM\Entity
*/
class Categories
{
/**
* #var int
*
* #ORM\Column(name="id", type="integer", nullable=false)
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="nom", type="string", length=50, nullable=false)
*/
private $nom;
public function getId(): ?int
{
return $this->id;
}
public function getNom(): ?string
{
return $this->nom;
}
public function setNom(string $nom): self
{
$this->nom = $nom;
return $this;
}
}

Answer 1

In symfony/forms each Form is an EventDispatcherInterface.
You can subscribe to one of the Events your form fires 🔥
In your case you want to add fields before your form is beeing processed.
class FriendMessageFormType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) {
$builder->add('activate_recette_1', ChoiceType::class);
$builder->add('activate_recette_2', ChoiceType::class);
});
}
}
You can inject your RecetteRepository via Dependency-Injection ans use the results.
Listen to the form events via:
Event-Listener
Event-Subscriber