我希望能够使用实体验证器约束来验证外键book_id是否有效,请参阅下文:
book.php中
/**
* Book
*
* @ORM\Table("book")
* @ORM\Entity
* @ORM\Entity(repositoryClass="AppBundle\Repository\BookRepository")
*/
class Book
{
/**
* @var integer
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string
* @ORM\Column(name="name", type="string")
* @Assert\Length(
* max = 250,
* maxMessage = "Name cannot be longer than {{ limit }} characters",
* groups={"create","update"}
* )
*/
private $name;
/**
* @ORM\OneToOne(targetEntity="Loan", mappedBy="book", fetch="LAZY")
*/
protected $loan;
}
Loan.php
/**
* Loan
*
* @ORM\Table("loan")
* @ORM\Entity
* @ORM\Entity(repositoryClass="AppBundle\Repository\LoanRepository")
*/
class Loan
{
/**
* @var integer
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var integer
* @ORM\Column(name="book_id", type="integer")
*/
protected $book_id;
/**
* @var string
* @ORM\Column(name="name", type="string")
* @Assert\Length(
* max = 500,
* maxMessage = "Person cannot be longer than {{ limit }} characters",
* groups={"create","update"}
* )
*/
private $person;
/**
* @ORM\OneToOne(targetEntity="Book", inversedBy="loan")
* @ORM\JoinColumn(name="book_id", referencedColumnName="id")
*/
protected $book;
}
以下是我目前正在验证贷款实体的方式
$loan = new Loan();
$loan->setPerson($person);
$loan->setBookId($id);
/** @var ConstraintViolation $error */
foreach ($this->get('validator')->validate($loan,null,['create'])->getIterator() as $index => $error) {
$errorMessages[] = $error->getMessage();
}
我想我可以将这样的自定义验证器添加到贷款实体中:
/**
* @Assert\IsTrue(message = "The book does not exist")
* @return bool
*/
public function isBookLegal(BookRepository $bookRepository)
{
return !$bookRepository->fetchById($this->book_id);
}
但我最终得到了以下例外:
Type error: Too few arguments to function
AppBundle\Entity\Loan::isBookLegal(), 0 passed and exactly 1 expected
答案 0 :(得分:3)
首先,您的$book_id
实体不应同时拥有$book
和Loan
。您应该删除$book_id
,这足以实现您的实体关系。
然后,您需要做的就是在@Assert\NotBlank()
上添加$book
:
use Symfony\Component\Validator\Constraints as Assert;
...
/**
* @ORM\OneToOne(targetEntity="Book", inversedBy="loan")
* @ORM\JoinColumn(name="book_id", referencedColumnName="id")
* @Assert\NotBlank()
*/
protected $book;
我不确定你用什么代码来获得所有贷款,但正如埃德温所说,这并不是一个好的形式。你想要更像的东西:
foreach ($loans as $loan) {
$errors = $this->get('validator')->validate($loan);
// do something here if there is an error
}
您编写的断言函数无法正常工作,因为您无法将值传递给isBookLegal()
函数,也无法在Entity类中使用数据库连接/存储库。< / p>
如果没有更好的背景,我不确定你要完成什么。由于您首先$book
注释,因此我们已经开始验证您的@ORM\OneToOne
成员。您不必执行任何其他验证。我猜你试图直接将值传递给$book_id
,这是不正确的。您应该只通过$book
Loan
实体传递到$loan->setBook(Book $book);
班级