这会导致错误：
$em = $this->getDoctrine()->getManager();
$courses = $em->getRepository(Course::class)->findBy(['id' => $ids]);
foreach ($courses as $course) {
$data = $form->getData();
$course->setProperties($data);
$em->persist($course);
}
$em->flush();
出现以下错误：
Type error:
Argument 3 passed to Doctrine\ORM\Event\PreUpdateEventArgs::
__construct() must be of the type array, null given, called in:
/var/www/bib/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php on line 1064
但是当我在一个循环中插入$em->flush();时 - 一切正常。
怎么了？
课程实体：
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
use CoreBundle\Entity\GuidTrait;
use CoreBundle\Entity\Typo3Trait;
use Knp\DoctrineBehaviors\Model\Timestampable\Timestampable;
use CoreBundle\Entity\LoggableTrait;
/**
* @ORM\Entity(repositoryClass="AppBundle\Repository\CourseRepository")
* @ORM\Table(name="courses")
* @ORM\HasLifecycleCallbacks()
*/
class Course
{
use GuidTrait, Typo3Trait, Timestampable, LoggableTrait;
const STATUS_INACTIVE = 0;
const STATUS_ACTIVE = 1;
/**
* @ORM\Column(type="string", length=150, nullable=true)
*/
protected $title;
/**
* @Assert\NotBlank()
* @ORM\Column(type="string")
*/
protected $code;
/**
* @Assert\NotBlank()
* @ORM\Column(name="`order`", type="integer")
*/
protected $order;
/**
* @Assert\NotBlank()
* @ORM\Column(type="smallint")
*/
protected $status;
/**
* @Assert\NotBlank()
* @Assert\DateTime()
* @ORM\Column(type="datetime", nullable=false)
*/
protected $date;
/**
* @Assert\NotBlank()
* @ORM\Column(type="text", nullable=false)
*/
protected $enrolmentDetails;
/**
* @Assert\NotBlank()
* @ORM\Column(type="text", nullable=false)
*/
protected $durationDetails;
/**
* @Assert\NotBlank()
* @ORM\Column(type="text", nullable=false)
*/
protected $timetable;
/**
* @Assert\NotBlank()
* @ORM\Column(type="string", nullable=false)
*/
protected $contactName;
/**
* @Assert\NotBlank()
* @Assert\Email
* @ORM\Column(type="string", nullable=false)
*/
protected $contactEmail;
/**
* @Assert\NotBlank()
* @ORM\Column(type="string", nullable=false)
*/
protected $contactPhone;
/**
* @ORM\Column(type="string", nullable=true)
*/
protected $contactFax;
/**
* @Assert\NotBlank()
* @Assert\Type(type="float")
* @Assert\GreaterThanOrEqual(0)
*
* @ORM\Column(type="decimal", precision=8, scale=2, nullable=false)
*/
protected $price;
/**
* @Assert\NotBlank()
* @Assert\GreaterThanOrEqual(0)
* @Assert\Type(type="integer")
*
* @ORM\Column(type="integer", nullable=false)
*/
protected $availability;
/**
* @ORM\Column(type="text", nullable=true)
*/
protected $courseNotes;
/**
* @ORM\ManyToOne(targetEntity="Centre", inversedBy="courses")
* @ORM\JoinColumn(name="centre_id", referencedColumnName="uid")
*/
protected $centre;
/**
* @Assert\NotBlank()
* @ORM\ManyToOne(targetEntity="Qualification", inversedBy="courses")
* @ORM\JoinColumn(name="qualification_id", referencedColumnName="uid",onDelete="CASCADE")
*/
protected $qualification;
/**
* @Assert\NotBlank()
* @ORM\ManyToOne(targetEntity="Venue", inversedBy="courses")
* @ORM\JoinColumn(name="venue_id", referencedColumnName="uid")
*/
protected $venue;
/**
* @ORM\OneToMany(targetEntity="Booking", mappedBy="course", cascade={"remove"})
*/
protected $bookings;
/**
* @ORM\Column(type="string", nullable=false)
*/
protected $reference;
public function __construct()
{
$this->status = self::STATUS_ACTIVE;
$this->code = 'CODE';
$this->order = 1;
}
/**
* @ORM\PreFlush
*/
public function updateReference()
{
$q = $this->getQualification()->getCode();
$c = $this->getCentre()->getCode();
$v = $this->getVenue()->getCode();
$d = $this->getDate()->format('d/m/Y');
$this->setReference("$q - $c - $v - $d");
}
/**
* @return mixed
*/
public function getTitle()
{
return $this->title;
}
/**
* @param $title
* @return $this
*/
public function setTitle($title)
{
$this->title = $title;
return $this;
}
/**
* @return mixed
*/
public function getCode()
{
return $this->code;
}
/**
* @param $code
* @return $this
*/
public function setCode($code)
{
$this->code = $code;
return $this;
}
/**
* @return mixed
*/
public function getOrder()
{
return $this->order;
}
/**
* @param $order
* @return $this
*/
public function setOrder($order)
{
$this->order = $order;
return $this;
}
/**
* @return mixed
*/
public function getStatus()
{
return $this->status;
}
/**
* @param $status
* @return $this
*/
public function setStatus($status)
{
$this->status = $status;
return $this;
}
/**
* @return mixed
*/
public function getDate()
{
return $this->date;
}
/**
* @param $date
* @return $this
*/
public function setDate($date)
{
$this->date = $date;
return $this;
}
/**
* @return mixed
*/
public function getEnrolmentDetails()
{
return $this->enrolmentDetails;
}
/**
* @param $enrolmentDetails
* @return $this
*/
public function setEnrolmentDetails($enrolmentDetails)
{
$this->enrolmentDetails = $enrolmentDetails;
return $this;
}
/**
* @return mixed
*/
public function getDurationDetails()
{
return $this->durationDetails;
}
/**
* @param $durationDetails
* @return $this
*/
public function setDurationDetails($durationDetails)
{
$this->durationDetails = $durationDetails;
return $this;
}
/**
* @return mixed
*/
public function getTimetable()
{
return $this->timetable;
}
/**
* @param $timetable
* @return $this
*/
public function setTimetable($timetable)
{
$this->timetable = $timetable;
return $this;
}
/**
* @return mixed
*/
public function getContactName()
{
return $this->contactName;
}
/**
* @param $contactName
* @return $this
*/
public function setContactName($contactName)
{
$this->contactName = $contactName;
return $this;
}
/**
* @return mixed
*/
public function getContactEmail()
{
return $this->contactEmail;
}
/**
* @param $contactEmail
* @return $this
*/
public function setContactEmail($contactEmail)
{
$this->contactEmail = $contactEmail;
return $this;
}
/**
* @return mixed
*/
public function getContactPhone()
{
return $this->contactPhone;
}
/**
* @param $contactPhone
* @return $this
*/
public function setContactPhone($contactPhone)
{
$this->contactPhone = $contactPhone;
return $this;
}
/**
* @return mixed
*/
public function getContactFax()
{
return $this->contactFax;
}
/**
* @param $contactFax
* @return $this
*/
public function setContactFax($contactFax)
{
$this->contactFax = $contactFax;
return $this;
}
/**
* @return mixed
*/
public function getPrice()
{
return $this->price;
}
/**
* @param $price
* @return $this
*/
public function setPrice($price)
{
$this->price = $price;
return $this;
}
/**
* @return mixed
*/
public function getAvailability()
{
return $this->availability;
}
/**
* @param $availability
* @return $this
*/
public function setAvailability($availability)
{
$this->availability = $availability;
return $this;
}
/**
* @return mixed
*/
public function getCourseNotes()
{
return $this->courseNotes;
}
/**
* @param $courseNotes
* @return $this
*/
public function setCourseNotes($courseNotes)
{
$this->courseNotes = $courseNotes;
return $this;
}
/**
* @return mixed
*/
public function getCentre()
{
return $this->centre;
}
/**
* @param $centre
* @return $this
*/
public function setCentre($centre)
{
$this->centre = $centre;
return $this;
}
/**
* @return mixed
*/
public function getQualification()
{
return $this->qualification;
}
/**
* @param $qualification
* @return $this
*/
public function setQualification($qualification)
{
$this->qualification = $qualification;
return $this;
}
/**
* @return mixed
*/
public function getVenue()
{
return $this->venue;
}
/**
* @param $venue
* @return $this
*/
public function setVenue($venue)
{
$this->venue = $venue;
return $this;
}
/**
* @return mixed
*/
public function getReference()
{
return $this->reference;
}
/**
* @param $reference
* @return $this
*/
public function setReference($reference)
{
$this->reference = $reference;
return $this;
}
/**
* @return mixed
*/
public function getBookings()
{
return $this->bookings;
}
/**
* @param mixed $bookings
*/
public function setBookings($bookings)
{
$this->bookings = $bookings;
}
public function getVat( $amount = 0 )
{
if (empty($amount)) {
return round( $this->price * $this->centre->getVat()->getRate()/100, 2 );
} else {
return round( $amount * $this->centre->getVat()->getRate()/100, 2 );
}
}
public function setProperties(Course $course)
{
foreach ($this as $key=>$value) {
if ($course->$key) {
$this->$key = $course->$key;
}
}
}
}
这个实体没有任何超自然现象。 有没有人对我问过的问题有答案？
答案 0 :(得分：1)
执行flush()方法时，Symfony和Doctrine中存在许多问题。例如，在Doctrine侦听器中调用flush()不是受支持的Doctrine用法。这意味着你试图在彼此内部嵌入几次冲洗，这确实会破坏工作单元。
在this StackOverflow Answer中有一个非常完整的示例，但我认为可能无法理解你的问题，所以如果你想要，你可以查看所有可能失败的情况：