如何在Symfony easy admin crud面板中创建下拉选择？

// src/Entity/Product.php

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 */
class Product
{
    // ...

    /**
     * @ORM\ManyToOne(targetEntity="App\Entity\Category")
     * @ORM\JoinColumn(nullable=false)
     */
    private $category;

    // ...

    public function getCategory(): ?Category
    {
        return $this->category;
    }

    public function setCategory(?Category $category): self
    {
        $this->category = $category;

        return $this;
    }
}

// src/Entity/Category.php

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 */
class Category
{
    // ...

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

    // ...

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

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

        return $this;
    }
}

# config/packages/easy_admin.yaml

easy_admin:
    entities:
        Product:
            class: App\Entity\Product
            form:
                fields:
                    - { property: 'name' }
                    - { property: 'category', type: 'entity', type_options: { class: 'App\Entity\Category' } }

php bin/console make:admin:crud