Doctrine 索引通过实体字段的注解

Question

我有下一个用不同语言定义旅行目的地的结构。

在 Destinations 中，检索 DestinationsTranslate (getDestinationsTranslations) 集合的方法我需要 id [=16] 字段的索引=] 能够调用的实体，例如 $destinationEntity->getDestinationsTranslations()->get('en') 以检索英文目的地的翻译；但如果我在 indexBy 注释中设置 idLanguage，则不起作用。我试试：

indexBy="idLanguage"
indexBy="idLanguage.id"
将 __toString 设置为语言实体。

这一切都不起作用。如果我尝试按 translation 字段进行索引，则有效。

不能按实体索引吗？

Destination的实体是：

/**
 * Destinations
 *
 * @ORM\Table(name="destinations", uniqueConstraints={@ORM\UniqueConstraint(name="id_UNIQUE", columns={"id"})}, indexes={@ORM\Index(name="fk_destinations_time_zones1_idx", columns={"id_time_zone"})})
 * @ORM\Entity
 */
class Destinations
{
    /**
     * @var string
     *
     * @ORM\Column(name="id", type="string", length=3, nullable=false, options={"fixed"=true,"comment"="Three letter IATA code."})
     * @ORM\Id     
     */
    private string $id;

    /**
     * @var bool
     *
     * @ORM\Column(name="mac", type="boolean", nullable=false, options={"comment"="Indicate if it is a metropolitan airline destination."})
     */
    private $mac = false;

    /**
     * @var \TimeZones
     *
     * @ORM\ManyToOne(targetEntity="TimeZones")
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name="id_time_zone", referencedColumnName="id")
     * })
     */
    private TimeZones $idTimeZone;

    /**
     * @ORM\OneToMany(targetEntity=DestinationsTranslation::class, mappedBy="idDestination", indexBy="idLanguage.id")
     */
    private $destinationsTranslations;

    /**
     * Constructor
     */
    public function __construct(string $iata, TimeZones $tz, bool $mac = false)
    {
        $this->id           = $iata;
        $this->idTimeZone   = $tz;
        $this->mac          = $mac;
        $this->destinationsTranslations = new ArrayCollection();
    }
}

Languages的实体是：

/**
 * Languages
 *
 * @ORM\Table(name="languages", uniqueConstraints={@ORM\UniqueConstraint(name="id_UNIQUE", columns={"id"})})
 * @ORM\Entity
 */
class Languages
{
    /**
     * @var string
     *
     * @ORM\Column(name="id", type="string", length=2, nullable=false, options={"fixed"=true,"comment"="Two letter code from ISO 639-1."})
     * @ORM\Id
     */
    private string $id;

    /**
     * @var string
     *
     * @ORM\Column(name="name", type="string", length=64, nullable=false, options={"comment"="ISO 639-1 language name."})
     */
    private string $name;

    /**
     * @ORM\OneToMany(targetEntity=DestinationsTranslation::class, mappedBy="idLanguage")
     */
    private $destinationsTranslations;

    /**
     * Constructor
     */
    public function __construct(string $code, string $name)
    {
        $this->id   = $code;
        $this->name = $name;
        $this->destinationsTranslations = new ArrayCollection();
    }
}

DestinationsTranslation的实体是：

/**
 * @ORM\Entity(repositoryClass=DestinationsTranslationRepository::class)
 */
class DestinationsTranslation
{
    /**
     * @ORM\Id
     * @ORM\ManyToOne(targetEntity=Languages::class, inversedBy="destinationsTranslations")
     * @ORM\JoinColumn(nullable=false)
     */
    private Languages $idLanguage;

    /**
     * @ORM\Id
     * @ORM\ManyToOne(targetEntity=Destinations::class, inversedBy="destinationsTranslations")
     * @ORM\JoinColumn(nullable=false)
     */
    private Destinations $idDestination;
    
    /**
     * @ORM\Column(type="string", length=64)
     */
    private string $translation;

    public function __construct(Languages $lang, Destinations $dest, string $translation)
    {
        $this->idLanguage       = $lang;
        $this->idDestination    = $dest;
        $this->translation      = $translation;
    }
}

Answer 1

问题出在命名关系的方式上，我重新生成了带有关系字段的实体，没有在它们的名称中设置 id，学说命令自动生成它并可以执行 indexBy。

注释是这样的：

/**
 * @ORM\OneToMany(targetEntity=DestinationsTranslation::class, mappedBy="destination", indexBy="language_id")
 */
 private Collection $destinationsTranslations;

Doctrine 索引通过实体字段的注解

Doctrine indexBy annotation by a entity field

doctrine

annotations

one-to-many

doctrine-orm