将实体声明为其他实体，获取要在产品类别上设置的类别名称

Question

I got confused.

I am have an ProductRepository.php that manages all the product, then I have a category attribute which should connected to CategoryRepository.php or Category Entity.

here is my code in ProductRepository.php

namespace App\Repository;

use App\Entity\Product;
use App\Entity\Category;
use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
use Symfony\Bridge\Doctrine\RegistryInterface;

class ProductRepository extends ServiceEntityRepository
{
    public function __construct(RegistryInterface $registry)
    {
        parent::__construct($registry, Product::class);
    }

    public function transform(Product $product)
    {
        $category = Category($product->getCategory()); // error
        $category = $category->getName();

        return [
                'id'    => (int) $product->getId(),
                'name' => (string) $product->getName(),
                'category' => (int) $product->getCategory(),
                'category_name' => (string) $category,
                'SKU' => (string) $product->getSKU(),
                'price' => (float) $product->getPrice(),
                'quantity'    => (int) $product->getQuantity()
        ];
    }

My issue, I got an error on declaring the Category class, any idea about this? my goal is to get the category name from the product's category attribute which is the id of the category model

category Model is:

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity(repositoryClass="App\Repository\CategoryRepository")
 */
class Category
{
    /**
     * @ORM\Id()
     * @ORM\GeneratedValue()
     * @ORM\Column(type="integer")
     */
    private $id;

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

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

    public function getName(): ?string
    {
        return $this->name;
    }

    public function setName(string $name): self
    {
        $this->name = $name;

        return $this;
    }
}

Answer 1

I think I understand what you're trying to do.

Assuming Product::category is a relation between Product and Category classes:

 $categoryName = $product->getCategory()->getName();

You simply get the object Category and then get its name.