News使用一對多的自引用方法相互關聯（一個消息是父消息，可以有多個子消息）。更重要的是 each與和News具有正常的（非自引用的）一對一關系。當我運行簡單的 DQL 時：EventGallerySELECT n FROM App\Entity\News n WHERE n.parent = :id然后通過設置getResults默認值的方法對結果進行水合HYDRATION_OBJECT，在方法內部的某處進行額外的查詢getResults。SELECT t0.* FROM event t0 WHERE t0.news_id = 2 AND ((t0.deleted_at IS NULL));SELECT t0.* FROM gallery t0 WHERE t0.news_id = 2 AND ((t0.deleted_at IS NULL));SELECT t0.* FROM event t0 WHERE t0.news_id = 1 AND ((t0.deleted_at IS NULL));SELECT t0.* FROM gallery t0 WHERE t0.news_id = 1 AND ((t0.deleted_at IS NULL));第一次查詢選擇的新聞的孩子在哪里和在哪里news_id = 1。news_id = 2News也沒有自引用的一對多關系（我在這里忽略了它們），但是 hydration 沒有對它們進行額外的查詢。parent僅當語句中涉及關系時才會出現此問題where。如何重現// news Entity/** * @ORM\Entity(repositoryClass="App\Repository\NewsRepository") * @ORM\Table(uniqueConstraints={@UniqueConstraint(name="news_slug_deleted", columns={"slug","deleted_at"})}) *class News {    use SoftDeleteableEntity;    /**     * @ORM\Id()     * @ORM\GeneratedValue()     * @ORM\Column(type="integer")     */    private $id;    /**     * @ORM\Column(type="string", length=255)     */    private $title;    /**     * @Gedmo\Slug(fields={"title"})     * @ORM\Column(length=128)     */    private $slug;/**     * @ORM\OneToOne(targetEntity="App\Entity\Gallery", mappedBy="news", cascade={"persist", "remove"}, orphanRemoval=true)     *     * @var Gallery     */    private $gallery;    /**     * @ORM\OneToOne(targetEntity="App\Entity\Event", mappedBy="news", cascade={"persist", "remove"}, orphanRemoval=true)     *     * @var Event     */    private $event;    /**     * One News has Many News.     * @ORM\OneToMany(targetEntity="News", mappedBy="parent")     */    private $children;    /**     * Many News have One News.     * @ORM\ManyToOne(targetEntity="News", inversedBy="children")     * @ORM\JoinColumn(name="parent_id", referencedColumnName="id", nullable=true)     */    private $parent;}