Php SQLSTATE[42S22]：未找到列

我已创建Formtype UniversitaireType，但出现以下错误：

当我尝试命令php-bin/console-doctrine:schema:update--force时，attribute condidat_id不会在数据库中创建（除id_condidat外，所有属性都在数据库中创建）。。我在实体大学做了一个多美元的地图

代码实体：

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use AppBundle\Entity\Condidat;

/**
 * Universitaire.
 *
 * @ORM\Table(name="universitaires")
 * @ORM\Entity(repositoryClass="AppBundle\Entity\UniversitaireEntityRepository")
 */
class Universitaire
{
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="date_start", type="string", length=255, nullable=true)
     */
    private $dateStart;

    /**
     * @var string
     *
     * @ORM\Column(name="date_end", type="string", length=255, nullable=true)
     */
    private $dateEnd;

    /**
     * @var string
     *
     * @ORM\Column(name="establishment", type="string", length=255, nullable=true, unique=true)
     */
    private $establishment;


    /**
     * @var string
     *
     * @ORM\Column(name="diploma", type="string", length=255, nullable=true, unique=true)
     */
    private $diploma;

    /**
     *@ORM\OneToMany(targetEntity="AppBundle\Entity\Condidat",mappedBy="id_universitaire",cascade={"persist"})
     *@ORM\JoinColumn(name="id_condidat", referencedColumnName="id")
     */
    private $condidat;

    /**
     * Get id.
     *
     * @return int
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Add Condidat
     *
     * @param \AppBundle\Entity\Condidat $condidat
     * @return Universitaire
     */
    public function addCondidat(\AppBundle\Entity\Condidat $condidat)
    {
        $this->condidat[] = $condidat;

        return $this;
    }

    /**
     * Remove Condidat
     *
     * @param \AppBundle\Entity\Condidat $condidat
     */
    public function removeCondidat(\AppBundle\Entity\Condidat $condidat)
    {
        $this->Condidat->removeElement($condidat);
    }

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


    /**
     * Set dateStart.
     *
     * @param string $dateStart
     *
     * @return Universitaire
     */
    public function setdateStart($dateStart)
    {
        $this->dateStart = $dateStart;

        return $this;
    }

    /**
     * Get dateStart.
     *
     * @return string
     */
    public function getdateStart()
    {
        return $this->dateStart;
    }

    /**
     * Set dateEnd.
     *
     * @param string $dateEnd
     *
     * @return Universitaire
     */
    public function setDateEnd($dateEnd)
    {
        $this->dateEnd = $dateEnd;

        return $this;
    }

    /**
     * Get dateEnd.
     *
     * @return string
     */
    public function getdateEnd()
    {
        return $this->dateEnd;
    }

    /**
     * Set establishment.
     *
     * @param string $establishment
     *
     * @return Universitaire
     */
    public function setEstablishment($establishment)
    {
        $this->establishment = $establishment;

        return $this;
    }

    /**
     * Get establishment.
     *
     * @return string
     */
    public function getEstablishment()
    {
        return $this->establishment;
    }

    /**
     * Set diploma.
     *
     * @param string $diploma
     *
     * @return Universitaire
     */
    public function setDiploma($diploma)
    {
        $this->diploma = $diploma;

        return $this;
    }

    /**
     * Get diploma.
     *
     * @return string
     */
    public function getDiploma()
    {
        return $this->diploma;
    }

    public function __construct()
    {
        $this->ResponsableCategory = new \Doctrine\Common\Collections\ArrayCollection();
    }

    }

---

您的“condidat”属性中有两个错误

您使用了一对多（双向）。如果你只想要一个
每个“Universitaire”的候选人-然后你必须使用一对一（双向）


如果不是，并且一对多正是您想要的，那么您必须在
\uu construct（）
中设置“condidat”是一个数组集合

public function __construct()
{
    $this->condidat = new \Doctrine\Common\Collections\ArrayCollection();
}

如果我是你，我宁愿用“候选者”和“s”来表示这是一个数组集合

正如我已经说过的，你的例子是双向的一对多。在本例中，我们使用mappedBy和inversedBy。实体，在其中设置联接列为所属方。当然，JoinColumn必须位于“候选”实体中。因此：

class Universitaire
{

    ## ...

    /**
     * Bidirectional One-To-Many (Owning Side)
     * Predicate: One Universitaire can have a lot of candidates
     * 
     * @ORM\OneToMany(
     *     targetEntity="AppBundle\Entity\Condidat",
     *     mappedBy="universitaire",
     *     cascade={"persist", "remove"}
     *     )
     */
     private $condidats;

class Condidat
{

    ## ...

    /**
     * Bidirectional Many-To-One (Owning Side)
     * Predicate: Each Condidat belongs to one Universitaire
     * 
     * @ORM\ManyToOne(
     *     targetEntity="AppBundle\Entity\Universitaire",
     *     inversedBy="condidats",
     *     )
     * @ORM\JoinColumn(
     *     name="universitaire_id",
     *     referencedColumnName="id", 
     *     onDelete="SET NULL"
     *      )
     */
     private $universitaire;


我添加了
onDelete=“SET NULL”
。如果删除universitaire，则在每个“条件”的universitaire字段中，您将看到空值
 看起来，“f0_u.username”列不存在。检查数据库中表“f0_389;”的结构。AppBundle\entity\Condidat的Post实体定义
public function __construct()
{
    $this->condidat = new \Doctrine\Common\Collections\ArrayCollection();
}

class Universitaire
{

    ## ...

    /**
     * Bidirectional One-To-Many (Owning Side)
     * Predicate: One Universitaire can have a lot of candidates
     * 
     * @ORM\OneToMany(
     *     targetEntity="AppBundle\Entity\Condidat",
     *     mappedBy="universitaire",
     *     cascade={"persist", "remove"}
     *     )
     */
     private $condidats;

class Condidat
{

    ## ...

    /**
     * Bidirectional Many-To-One (Owning Side)
     * Predicate: Each Condidat belongs to one Universitaire
     * 
     * @ORM\ManyToOne(
     *     targetEntity="AppBundle\Entity\Universitaire",
     *     inversedBy="condidats",
     *     )
     * @ORM\JoinColumn(
     *     name="universitaire_id",
     *     referencedColumnName="id", 
     *     onDelete="SET NULL"
     *      )
     */
     private $universitaire;