当使用嵌入式关系更新实体时，API平台和/或Doctrine会尝试更新所有现有实体

Question

我有一个清单的OneToMany关系，并且设置了“答案”，以便消费者可以更新清单并向其中添加答案。

当答案表中没有答案，但是当出现问题并且API平台和/或Doctrine要更新所有答案时，此方法很好用，从而导致以下错误：

An exception occurred while executing 'UPDATE answer SET checklist_id = ?, updated = ? WHERE id = ?' with params [null, \"2019-08-18 12:44:55\", 96]:\n\nSQLSTATE[23000]: Integrity constraint violation: 1048 Column 'checklist_id' cannot be null

将以下请求正文放入/api/checklists/2

时，我收到此错误

{
    "answers": [
        {
            "answer": "Ok",
            "user": "/api/users/9",
            "question": "/api/questions/3"
        },
        {
            "answer": "NotK",
            "user": "/api/users/9",
            "question": "/api/questions/4"
        }
    ]
}

这是两个实体的配置：

答案：     

namespace AppBundle\Entity;


use ApiPlatform\Core\Annotation\ApiResource;
use AppBundle\Entity\Traits\DefaultTrait;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Serializer\Annotation\Groups;
use Symfony\Component\Serializer\Annotation\MaxDepth;

/**
 * Class Answer
 * @package AppBundle\Entity
 * @ApiResource(
 *     attributes={
 *         "normalization_context"={"groups"={"answer:read"}, "enable_max_depth"=true},
 *         "denormalization_context"={"groups"={"answer:write", "checklist:write"}}
 *     }
 * )
 * @ORM\Entity()
 * @ORM\Table(name="answer")
 */
class Answer
{
    use DefaultTrait;

    /**
     * @ORM\Column(type="string", length=255)
     * @Groups({"answer:read", "answer:write", "checklist:read", "checklist:write"})
     */
    private $answer;

    /**
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\User")
     * @ORM\JoinColumn(name="user_id", referencedColumnName="user_id")
     * @Groups({"answer:read", "answer:write", "checklist:read", "checklist:write"})
     * @MaxDepth(1)
     */
    private $user;

    /**
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\Checklist", inversedBy="answers")
     * @ORM\JoinColumn(nullable=false)
     * @Groups({"answer:read", "answer:write", "checklist:write"})
     */
    private $checklist;

    /**
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\Question", inversedBy="answers")
     * @ORM\JoinColumn(nullable=false)
     * @Groups({"answer:read", "answer:write", "checklist:write"})
     * @MaxDepth(1)
     */
    private $question;

    # Getters and setters omitted
}

清单：

<?php

namespace AppBundle\Entity;


use ApiPlatform\Core\Annotation\ApiResource;
use ApiPlatform\Core\Annotation\ApiSubresource;
use AppBundle\Annotation\CompanyAware;
use AppBundle\Entity\Traits\EnabledTrait;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
use AppBundle\Entity\Traits\DefaultTrait;
use Symfony\Component\Serializer\Annotation\MaxDepth;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Serializer\Annotation\Groups;

/**
 * @ApiResource(attributes={
 *     "force_eager"=false,
 *     "normalization_context"={"groups"={"checklist:read"}, "enable_max_depth"=true},
 *     "denormalization_context"={"groups"={"checklist:write"}, "enable_max_depth"=true}
 * })
 * @ORM\Entity
 * @ORM\Table(name="checklist")
 * @CompanyAware(companyFieldName="company_id")
 */
class Checklist
{
    use DefaultTrait;
    use EnabledTrait;

    /**
     * @var string
     *
     * @ORM\Column(name="name", type="string", length=255)
     * @Assert\NotBlank()
     * @Groups({"checklist:read", "checklist:write"})
     */
    private $name;

    /**
     * @ORM\Column(name="description", type="text", nullable=true)
     *
     * @var string
     * @Groups({"checklist:read", "checklist:write"})
     */
    private $description;

    /**
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\Checklist")
     */
    private $parent;

    /**
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\Category", inversedBy="checklist")
     * @Groups({"checklist:read", "checklist:write"})
     */
    private $category;

    /**
     * @ORM\OneToMany(targetEntity="AppBundle\Entity\QuestionGroup", mappedBy="checklist", cascade={"persist", "remove"})
     * @Groups({"checklist:read", "checklist:write"})
     * @MaxDepth(1)
     */
    private $groups;

    /**
     * @ORM\OneToMany(targetEntity="AppBundle\Entity\Question", mappedBy="checklist", cascade={"persist", "remove"})
     * @Groups({"checklist:read", "checklist:write"})
     */
    private $questions;

    /**
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\Company", inversedBy="checklists")
     * @Groups({"checklist:read", "checklist:write"})
     */
    private $company;

    /**
     * @ORM\OneToMany(targetEntity="AppBundle\Entity\Answer", mappedBy="checklist", cascade={"persist", "remove"})
     * @Groups({"checklist:write"})
     * @ApiSubresource()
     */
    private $answers;
}