教义“没有关联命名" | 没有关联命名

本文介绍了教义“没有关联命名"的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

将我添加到无法确定其教义映射出什么问题的人员列表中.我正在用OneToMany Halfmoves为国际象棋Game建模-有什么想法吗?

Add me to the list of people who can't work out what's wrong with their Doctrine mapping. I'm modelling a Chess Game with OneToMany Halfmoves - any ideas?

DDL:

create table game ( game_id int primary key  );
create table halfmove(halfmove_id int primary key, game_id int);

Game.php:

/**
* Game
*
* @ORM\Table(name="game")
* @ORM\Entity
*/
class Game
{
/**
 * @ORM\OneToMany(targetEntity="Halfmove", mappedBy="game")
 */
private $halfmoves;

public function getHalfmoves(){
    return $this->halfmoves;
}

public function setHalfmoves($halfmoves){
    $this->$halfmoves = $halfmoves;
}

public function __construct()
{
    $this->halfmoves = new ArrayCollection();
}
...

Halfmove.php:

/**
 * Halfmove
 *
 * @ORM\Table(name="halfmove")
 * @ORM\Entity
 */
class Halfmove
{
/**
 * @var integer
 *
 * @ORM\Column(name="game_id", type="integer", nullable=true)
 */
private $gameId;


/**
 * @ORM\ManyToOne(targetEntity="Game", inversedBy="halfmoves")
 * @ORM\JoinColumn(name="game_id", referencedColumnName="game_id")
 */
private $game;

public function getGame(){
    return $this->game;
}

public function setGame($game){
    $this->game = $game;
}
...

产生错误的查询:

    $em = $this->getDoctrine()->getManager();
    $query = $em
    ->createQuery(
            'SELECT p, c FROM AppBundle:Halfmove p
        JOIN p.Game c
        WHERE c.game_id = :id'
            )->setParameter('id', 3525);
    $result =  $query->getSingleResult();

错误消息:

推荐答案

您在Halfmove实体中声明了$game.在用p.game替换p.Game之后尝试.

You declared $game in Halfmove entity. Try after replacing p.Game with p.game.

$em = $this->getDoctrine()->getManager();
$query = $em->createQuery(
        'SELECT p, c FROM AppBundle:Halfmove p
            JOIN p.game c
            WHERE c.game_id = :id'
        )->setParameter('id', 3525);
$result =  $query->getSingleResult();

其他更新

此外，我建议您对实体进行一些更改.

Additionally i recommend some changes in you entities.

Game.php

<?php

use Doctrine\ORM\Mapping as ORM;

/**
* Game
*
* @ORM\Table(name="game")
* @ORM\Entity
*/
class Game
{

    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @ORM\OneToMany(targetEntity="Halfmove", mappedBy="game")
     */
    private $halfmoves;

    public function getHalfmoves(){
        return $this->halfmoves;
    }

    public function setHalfmoves($halfmoves){
        $this->$halfmoves = $halfmoves;
    }

    public function __construct()
    {
        $this->halfmoves = new ArrayCollection();
    }
    ...

Halfmove.php

<?php
use Doctrine\ORM\Mapping as ORM;

/**
 * Halfmove
 *
 * @ORM\Table(name="halfmove")
 * @ORM\Entity
 */
class Halfmove
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @ORM\ManyToOne(targetEntity="Game", inversedBy="halfmoves")
     * @ORM\JoinColumn(name="game_id", referencedColumnName="id")
     */
    private $game;

    public function getGame(){
        return $this->game;
    }

    public function setGame($game){
        $this->game = $game;
    }
    ...

执行查询

$query = $em->getRepository("Halfmove")
    ->createQueryBuilder('p')
    ->innerJoin("p.game", 'c')
    ->where("c.id = :CId")
    ->setParameter("CId", 3525);

$moves = $query->getQuery()->getResult();

这篇关于教义“没有关联命名"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！