php - 原则 2 关系错误

Question

我在将记录插入数据库时​​遇到问题。 我有 3 个表，名为 通知: id、id_event、event_id、is_readed 评论: id、评论、接收者、发送者、created_at 消息 id、主题、消息、接收者、发送者、created_at

我想将 notification.id_event 的评论和消息 id 与多对多关系关联起来，如下所示

oneToOne:
    comment:
        targetEntity: Comments
        joinColumn:
            name: id_event
            referencedColumnName: id

    message:
        targetEntity: Messages
        joinColumn:
            name: id_event
            referencedColumnName: id

当我尝试插入记录时出现以下异常:

Found entity of type Doctrine\Common\Collections\ArrayCollection on association Privatmarket\BusinessBundle\Entity\Notifications#message, but expecting Privatmarket\BusinessBundle\Entity\Messages

而且真的不知道该怎么办。也许我在关系选择上犯了错误？

插入代码是:

        $comment = new Comments();
        $comment->setSender(rand(1, 10));
        $comment->setReceiver(rand(11, 20));
        $comment->setComment("Lorem ipsum dolor sit amet {$i}, olor sit amet {$i}, psum dolor sit amet {$i}, olor sit amet {$i}, ");
        $em->persist($comment);
        $em->flush();

        $notification = new Notifications();
        $id = $comment->getId();
        $notification->setComment($em->getRepository("PrivatmarketBusinessBundle:Comments")->find($id));
        $notification->setEventId(2);
        $em->persist($notification);
        $em->flush();


        $message = new Messages();
        $message->setSender(rand(1, 10));
        $message->setReceiver(rand(11, 20));
        $message->setSubject("Lorem ipsu{$i}.");
        $message->setMessage("Lorem ipsum dolor sit amet {$i}, olor sit amet {$i}, psum dolor sit amet {$i}, olor sit amet {$i}, Lorem ipsum dolor sit amet {$i}, olor sit amet {$i}, psum dolor sit amet {$i}, olor sit amet {$i}, ");
        $em->persist($message);
        $em->flush();

        $notification = new Notifications();
        $id = $message->getId();
        $notification->setComment($em->getRepository("PrivatmarketBusinessBundle:Messages")->find($id));
        $notification->setEventId(1);
        $em->persist($notification);
        $em->flush();

Answer 1

嗯，你得到的错误读起来就像改变

message:
    targetEntity: Messages
    joinColumn:
        name: id_event
        referencedColumnName: id

至

message:
    targetEntity: Message
    joinColumn:
        name: id_event
        referencedColumnName: id

请注意，一个学说期望实体名称为单数，因此如果它是一个集合，它会自动将 getter 和 setter 复数化，也许这有点困惑