我有一个以下的Product对象/类:
class Product
{
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* @Exclude()
* @ORM\Column(name="deletedAt", type="datetime", nullable=true)
*/
private $deletedAt;
/**
* @Assert\NotBlank()
* @Assert\MinLength( limit=3, message=" Product Name should have at least {{ limit }} characters.")
* @ORM\Column(name="name", type="string", length=100 , nullable=false)
*/
protected $name;
/**
* @var datetime $created
* @Gedmo\Timestampable(on="create")
* @ORM\Column(type="datetime")
*/
private $created;
/**
* @var datetime $updated
* @Gedmo\Timestampable(on="update")
* @ORM\Column(type="datetime")
*/
private $updated;
/**
* @ORM\Column(name="description", type="string", length=350)
*/
protected $description;
/**
* @Assert\NotBlank()
* @ORM\Column(name="code", type="string", length=100)
*/
protected $code;
/**
* @Assert\NotBlank()
* @ORM\ManyToOne(targetEntity="Shopious\MainBundle\Entity\Category", inversedBy="products")
* @ORM\JoinColumn(name="category_id", referencedColumnName="id", onDelete="CASCADE", nullable=true)
*/
protected $category;
/**
* @Assert\NotBlank()
* @Assert\Min(limit = "0", message = "negative number is invalid")
* @Assert\Type(type="float", message="The value {{ value }} is not a valid number.")
* @ORM\Column(name="price", type="float")
*/
protected $price;
/**
* @Assert\NotBlank()
* @Assert\Min(limit = "0", message = "negative number is invalid")
* @Assert\Type(type="float", message="The value {{ value }} is not a valid number.")
* @ORM\Column(name="height", type="float")
*/
protected $height;
/**
* @Assert\NotBlank()
* @Assert\Min(limit = "0", message = "negative number is invalid")
* @Assert\Type(type="float", message="The value {{ value }} is not a valid number.")
* @ORM\Column(name="width", type="float")
*/
protected $width;
/**
* @Assert\NotBlank()
* @Assert\Min(limit = "0", message = "negative number is invalid")
* @Assert\Type(type="float", message="The value {{ value }} is not a valid number.")
* @ORM\Column(name="length", type="float")
*/
protected $length;
/**
* @Assert\NotBlank()
* @Assert\Min(limit = "0", message = "negative number is invalid")
* @Assert\Type(type="float", message="The value {{ value }} is not a valid number.")
* @ORM\Column(name="weight", type="float" )
*/
protected $weight;
/**
* @Accessor(getter="getShopRef")
* @ORM\ManyToOne(targetEntity="Shopious\MainBundle\Entity\Shop", inversedBy="products")
* @ORM\JoinColumn(name="shop_id", referencedColumnName="id", onDelete="CASCADE" , nullable=false)
*/
protected $shop;
/**
* @ORM\OneToMany(targetEntity="ProductAttribute", mappedBy="product", cascade={"persist","remove"})
*/
protected $attributes;
}
我有一个Product对象,想要移除该产品的所有属性,所以我执行了以下操作:
unset(product->attributes)
然而,它抱怨无法访问属性。如何将产品的属性设置为nil?