Doctrine中的updated_at,created_at的自动值

Question

我想让字段updated_at和created_at我的Doctrine实体自动更新.

在Ruby on Rails模型中有2个字段:updated_at和created_at.

可在此处找到说明:http://guides.rubyonrails.org/migrations.html#migration-overview:

时间戳宏添加了两列,created_at和updated_at.这些特殊列由Active Record自动管理(如果存在).

我可以在Doctrine 2中启用类似的功能吗？

Answer 1

1. 你可以调用$this->setCreatedAt(new \DateTime())的__construct方法.
2. 您可以使用生命周期回调

/**
 * @ORM\PrePersist
 * @ORM\PreUpdate
*/
public function updatedTimestamps(): void
{
    $this->setUpdatedAt(new \DateTime('now'));    
    if ($this->getCreatedAt() === null) {
        $this->setCreatedAt(new \DateTime('now'));
    }
}

并且不要忘记添加到实体类表示法中: @ORM\HasLifecycleCallbacks

Answer 2

如果您想要单独处理它们,这是另一种选择.

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 * @ORM\Table(name="person")
 * @ORM\HasLifecycleCallbacks
 */
class Person
{
    ..........

    /**
     * @var datetime $created
     *
     * @ORM\Column(type="datetime")
     */
    protected $created;

    /**
     * @var datetime $updated
     * 
     * @ORM\Column(type="datetime", nullable = true)
     */
    protected $updated;


    /**
     * Gets triggered only on insert

     * @ORM\PrePersist
     */
    public function onPrePersist()
    {
        $this->created = new \DateTime("now");
    }

    /**
     * Gets triggered every time on update

     * @ORM\PreUpdate
     */
    public function onPreUpdate()
    {
        $this->updated = new \DateTime("now");
    }

    ..........
}

Answer 3

对我来说最方便的解决方案是StofDoctrineExtensionsBundle的Timestampable功能.

简单的配置,以后你能够做出领域createdAt和updatedAt中Entity填写了加入自动两个简单的annotations,如:

@Gedmo\Mapping\Annotation\Timestampable(on="create")

和/或

@Gedmo\Mapping\Annotation\Timestampable(on="update")

例如

/**
 * @var \DateTime
 * @Gedmo\Mapping\Annotation\Timestampable(on="create")
 * @Doctrine\ORM\Mapping\Column(type="datetime")
 */
protected $createdAt;

/**
 * @var \DateTime
 * @Gedmo\Mapping\Annotation\Timestampable(on="update")
 * @Doctrine\ORM\Mapping\Column(type="datetime")
 */
protected $updatedAt;

没有任何纯粹的冗余代码PHP.

Answer 4

您也可以将其实现为特征 - 如下所示：

<?php

namespace App\Entity\Traits;

use DateTime;
use DateTimeInterface;
use Exception;

/**
 * Trait TimeStampableTrait
 * @package App\Entity\Trait
 */
trait TimeStampableTrait
{
    /**
     * @ORM\Column(type="datetime")
     */
    private $createdAt;

    /**
     * @ORM\Column(type="datetime")
     */
    private $updatedAt;

    /**
     * @return DateTimeInterface|null
     * @throws Exception
     */
    public function getCreatedAt(): ?DateTimeInterface
    {
        return $this->createdAt ?? new DateTime();
    }

    /**
     * @param DateTimeInterface $createdAt
     * @return $this
     */
    public function setCreatedAt(DateTimeInterface $createdAt): self
    {
        $this->createdAt = $createdAt;

        return $this;
    }

    /**
     * @return DateTimeInterface|null
     */
    public function getUpdatedAt(): ?DateTimeInterface
    {
        return $this->updatedAt ?? new DateTime();
    }

    /**
     * @param DateTimeInterface $updatedAt
     * @return $this
     */
    public function setUpdatedAt(DateTimeInterface $updatedAt): self
    {
        $this->updatedAt = $updatedAt;

        return $this;
    }

    /**
     * @ORM\PrePersist()
     * @ORM\PreUpdate()
     */
    public function updateTimestamps(): void
    {
        $now = new DateTime();
        $this->setUpdatedAt($now);
        if ($this->getId() === null) {
            $this->setCreatedAt($now);
        }
    }
}

将此特征添加到您的实体（不要忘记@ORM\HasLifecycleCallbacks()符号）：

<?php

namespace App\Entity;

use App\Entity\Traits\TimeStampableTrait;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity(repositoryClass="App\Repository\MyEntityRepository")
 * @ORM\HasLifecycleCallbacks()
 */
class MyEntity
{
    use TimeStampableTrait;
}