Question

我有两个名为jobs和attachments的表。一个作业可能有也可能没有一个或多个附件。我创建了一个可能与作业和附件的关系。但是当我试图坚持它时给了我一个错误，

A new entity was found through the relationship 'AppBundle\Entity\JotJobs#attachments' that was not configured to cascade persist operations for entity: AppBundle\Entity\JotJobAttachments@000000004d40cceb00000000fe114bdc. To solve this issue: Either explicitly call EntityManager#persist() on this unknown entity or configure cascade persist this association in the mapping for example @ManyToOne(..,cascade={"persist"}). If you cannot find out which entity causes the problem implement 'AppBundle\Entity\JotJobAttachments#__toString()' to get a clue.

然后我试图在作业实体中设置级联持久化，之后它总是要求每个作业的强制附件。否则它会给出一个错误，job_id在附件表中不能为空。我正在尝试在过去几个小时内纠正它。请帮助。

我的实体是，

<?php
namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * JotJobs
 *
 * @ORM\Table(name="jot_jobs")
 * @ORM\Entity
 */
class JotJobs
{
   /**
     * @var \JotJobAttachments
     *
     * @ORM\OneToMany(targetEntity="JotJobAttachments" ,mappedBy="jotJobs")
     * @ORM\JoinColumn(name="ID", referencedColumnName="job_id")
     */
     private $attachments;

     /**
     * Constructor
     */
    public function __construct()
    {
        $this->attachments = new \Doctrine\Common\Collections\ArrayCollection();
    }

    /**
     * Get subTechnologies
     *
     * @return \Doctrine\Common\Collections\Collection 
     */
    public function getSubTechnologies()
    {
        return $this->subTechnologies;
    }

    /**
     * Add attachments
     *
     * @param \AppBundle\Entity\JotJobAttachments $attachments
     * @return JotJobs
     */
    public function addAttachment(\AppBundle\Entity\JotJobAttachments $attachments=null)
    {
        $this->attachments[] = $attachments;
        return $this;
    }

    /**
     * Remove attachments
     *
     * @param \AppBundle\Entity\JotJobAttachments $attachments
     */
    public function removeAttachment(\AppBundle\Entity\JotJobAttachments $attachments)
    {
        $this->attachments->removeElement($attachments);
    }
}


<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * JotJobAttachments
 *
 * @ORM\Table(name="jot_job_attachments")
 * @ORM\Entity
 */
class JotJobAttachments
{
    /**
     * @var \JotJobs
     *
     * @ORM\ManyToOne(targetEntity="JotJobs", inversedBy="attachments")
     * @ORM\JoinColumn(name="job_id", referencedColumnName="ID", nullable=true)
     */
     private $jotJobs;

      /**
     * Set jotJobs
     *
     * @param \AppBundle\Entity\JotJobs $jotJobs
     * @return JotJobAttachments
     */
    public function setJotJobs(\AppBundle\Entity\JotJobs $jotJobs = null)
    {
        $this->jotJobs = $jotJobs;

        return $this;
    }

    /**
     * Get jotJobs
     *
     * @return \AppBundle\Entity\JotJobs 
     */
    public function getJotJobs()
    {
        return $this->jotJobs;
    }
}

在我的控制器中，

$newJob = new JotJobs();
$newJob->setJobName($data->getJobName());
.
.
.
$attachments = $data->getAttachments();
            $jobDir = $this->container->getParameter('uploads_directory').'/jobs';
            foreach ($attachments as $key => $value) {
                if($value->getAttachment()!=null)
                {
                    /** @var Symfony\Component\HttpFoundation\File\UploadedFile $file */
                    $file = $value->getAttachment();

                    $fileName = md5(uniqid()).'.'.$file->guessExtension();
                    $file->move($jobDir, $fileName);

                    $jobAttachment = new JotJobAttachments();
                    $jobAttachment->setAttachment($fileName);
                    $jobAttachment->setAttachmentName($file->getClientOriginalName());
                    $newJob->addAttachment($jobAttachment);
                }
            }
            $entityManager->persist($newJob);  
            $entityManager->flush();
            $lId = $newJob->getId();

Answer 1

这里有两件事。

如前所述，第一个是你需要在OneToMany关系上使用cascade = {＆＃34; all＆＃34;}。如果删除作业，请使用all而不是persist snce，您几乎肯定也希望删除附件。

第二，您需要在附件中设置作业参考。这就是你得到那些空错误的原因。

public function addAttachment(\AppBundle\Entity\JotJobAttachment $attachment=null)
{
    $this->attachments[] = $attachment;
    $attachment->setJotJob($this); // ADD THIS
    return $this;
}

您也可以考虑将JotJobAttachments之类的内容更改为JotJobAttachment。使您的代码更易于理解。

并且不要太关注失败的选民。这种交叉引用要求会吸引许多开发人员，并且不容易搜索。

Symfony 2.7：通过这种关系找到了一个新的实体

1 个答案: