सिम्फनी पर फॉर्म बनाएं, संपत्ति मौजूद नहीं है

मैं एक सिम्फनी प्रोजेक्ट पर काम कर रहा हूं और मैं एक फॉर्म क्लास बनाना चाहता था। लेकिन जब मैं जेनरेट क्लास PropertyType बनाता हूं, तो यह नहीं मिलता है, और मुझे संपादन विधि में एक त्रुटि है:

Property "postalCode" does not exist in class "App\Entity\Property"

मेरा कोड:

/**
 * @Route("/admin/{id}", name="admin.property.edit")
 * @param Property $property
 * @return Response
 */
public function edit (Property $property) : Response
{
    $form = $this->createForm(PropertyType::class, $property);
    return $this->render('admin/property/edit.html.twig', [
        'property'  =>  $property,
        'form'      =>  $form->createView()
    ]);
}

और संपत्ति वर्ग (इकाई):

<?php

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;
use Cocur\Slugify\Slugify;

/**
 * @ORM\Entity(repositoryClass="App\Repository\PropertyRepository")
 */
class Property
{

    const HEAT = [
        0   => 'Electrique',
        1   => 'Gaz'
    ];

    /**
     * @ORM\Id()
     * @ORM\GeneratedValue()
     * @ORM\Column(type="integer")
     */
    private $id;

    /**
     * @ORM\Column(type="string", length=255)
     */
    private $title;

    /**
     * @ORM\Column(type="text", nullable=true)
     */
    private $description;

    /**
     * @ORM\Column(type="integer")
     */
    private $surface;

    /**
     * @ORM\Column(type="integer")
     */
    private $rooms;

    /**
     * @ORM\Column(type="integer")
     */
    private $bedrooms;

    /**
     * @ORM\Column(type="integer")
     */
    private $floor;

    /**
     * @ORM\Column(type="integer")
     */
    private $price;

    /**
     * @ORM\Column(type="integer")
     */
    private $heat;

    /**
     * @ORM\Column(type="string", length=255)
     */
    private $city;

    /**
     * @ORM\Column(type="string", length=255)
     */
    private $address;

    /**
     * @ORM\Column(type="string", length=255)
     */
    private $postal_code;

    /**
     * @ORM\Column(type="boolean", options={"default": false})
     */
    private $sold = false;

    /**
     * @ORM\Column(type="datetime")
     */
    private $created_at;

    public function __construct ()
    {
        $this->created_at = new \DateTime();
    }

    public function getId(): ?int
    {
        return $this->id;
    }

    public function getTitle(): ?string
    {
        return $this->title;
    }

    public function getSlug() : string
    {
        return (new Slugify())->slugify($this->title);
    }

    public function setTitle(string $title): self
    {
        $this->title = $title;

        return $this;
    }

    public function getDescription(): ?string
    {
        return $this->description;
    }

    public function setDescription(?string $description): self
    {
        $this->description = $description;

        return $this;
    }

    public function getSurface(): ?int
    {
        return $this->surface;
    }

    public function setSurface(int $surface): self
    {
        $this->surface = $surface;

        return $this;
    }

    public function getRooms(): ?int
    {
        return $this->rooms;
    }

    public function setRooms(int $rooms): self
    {
        $this->rooms = $rooms;

        return $this;
    }

    public function getBedrooms(): ?int
    {
        return $this->bedrooms;
    }

    public function setBedrooms(int $bedrooms): self
    {
        $this->bedrooms = $bedrooms;

        return $this;
    }

    public function getFloor(): ?int
    {
        return $this->floor;
    }

    public function setFloor(int $floor): self
    {
        $this->floor = $floor;

        return $this;
    }

    public function getPrice(): ?int
    {
        return $this->price;
    }

    public function getFormattedPrice() : string
    {
        return \number_format($this->price, 0, '', ' ');
    }

    public function setPrice(int $price): self
    {
        $this->price = $price;

        return $this;
    }

    public function getHeat(): ?int
    {
        return $this->heat;
    }

    public function getHeatType(): string
    {
        return self::HEAT[$this->heat];
    }

    public function setHeat(int $heat): self
    {
        $this->heat = $heat;

        return $this;
    }

    public function getCity(): ?string
    {
        return $this->city;
    }

    public function setCity(string $city): self
    {
        $this->city = $city;

        return $this;
    }

    public function getAddress(): ?string
    {
        return $this->address;
    }

    public function setAddress(string $address): self
    {
        $this->address = $address;

        return $this;
    }

    public function getPostalCode(): ?string
    {
        return $this->postal_code;
    }

    public function setPostalCode(string $postal_code): self
    {
        $this->postal_code = $postal_code;

        return $this;
    }

    public function getSold(): ?bool
    {
        return $this->sold;
    }

    public function setSold(bool $sold): self
    {
        $this->sold = $sold;

        return $this;
    }

    public function getCreatedAt(): ?\DateTimeInterface
    {
        return $this->created_at;
    }

    public function setCreatedAt(\DateTimeInterface $created_at): self
    {
        $this->created_at = $created_at;

        return $this;
    }
}

सिम्फनी के साथ उत्पन्न संपत्ति प्रकार वर्ग।

<?php

namespace App\Form;

use App\Entity\Property;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;

class PropertyType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('title')
            ->add('description')
            ->add('surface')
            ->add('rooms')
            ->add('bedrooms')
            ->add('floor')
            ->add('price')
            ->add('heat')
            ->add('city')
            ->add('address')
            ->add('postal_code')
            ->add('sold')
            ->add('created_at')
        ;
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'data_class' => Property::class,
        ]);
    }
}