自分で解決策を見つけました。私が行ったさまざまな手順を以下にリストしました。この答えは非常に大きいですが、私はできるだけ完全にしようとしました。
最も重要なものは、Product YAML ファイル、inheritanceType: JOINED
およびVideo および Car エンティティ クラスにあります。discriminatorColumn:
discriminatorMap:
class Video extends Product
class Car extends Product
1) DB スキーマ
CREATE TABLE IF NOT EXISTS `artists` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
CREATE TABLE IF NOT EXISTS `brands` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
CREATE TABLE IF NOT EXISTS `cars` (
`id` int(11) NOT NULL,
`model` varchar(255) NOT NULL,
`release_date` date NOT NULL,
`brand_id` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
CREATE TABLE IF NOT EXISTS `products` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`description` varchar(255) NOT NULL,
`price` double NOT NULL,
`object_type` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
CREATE TABLE IF NOT EXISTS `videos` (
`id` int(11) NOT NULL,
`file_name` varchar(255) NOT NULL,
`release_date` date NOT NULL,
`artist_id` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
2) Doctrine YAML ファイル (そこからエンティティとプロキシ クラスを作成する必要があります)
Entities.Artist.dcm.yml
Entities\Artist:
type: entity
table: artists
id:
id:
type: integer
primary: true
notnull: true
generator:
strategy: AUTO
fields:
name:
type: string(255)
notnull: true
oneToMany:
videos:
targetEntity: Video
mappedBy: artist
options:
charset: utf8
type: InnoDB
エンティティ.ブランド.dcm.yml
Entities\Brand:
type: entity
table: brands
id:
id:
type: integer
primary: true
notnull: true
generator:
strategy: AUTO
fields:
name:
type: string(255)
notnull: true
oneToMany:
cars:
targetEntity: Car
mappedBy: brand
options:
charset: utf8
type: InnoDB
Entities.Car.dcm.yml
Entities\Car:
type: entity
table: cars
fields:
model:
type: string
notnull: true
release_date:
type: date
notnull: true
oneToOne: #unidirectional
brand:
targetEntity: Brand
joinColumns:
brand_id:
referencedColumnName: id
options:
charset: utf8
type: InnoDB
エンティティ.製品.dcm.yml
Entities\Product:
type: entity
table: products
id:
id:
type: string
primary: true
notnull: true
generator:
strategy: AUTO
fields:
description:
type: string(255)
notnull: true
price:
type: decimal
notnull: true
inheritanceType: JOINED
discriminatorColumn:
name: object_type
type: string
length: 255
discriminatorMap:
video: Video
car: Car
options:
charset: utf8
type: InnoDB
エンティティ.ビデオ.dcm.yml
Entities\Video:
type: entity
table: videos
fields:
file_name:
type: string
notnull: true
release_date:
type: date
notnull: true
oneToOne: #unidirectional
artist:
targetEntity: Artist
joinColumns:
artist_id:
referencedColumnName: id
options:
charset: utf8
type: InnoDB
3) Entity クラスと Proxy クラスを作成する
CodeIgniter を使用しています。Joel Verhagenの優れたガイドを使用しました
!! Video と Car を Product で拡張することが重要です - 以下を参照してください !!
これにより、次のエンティティ クラスが生成されます。
アーティスト.php
namespace Entities;
use Doctrine\ORM\Mapping as ORM;
/**
* Entities\Artist
*
* @ORM\Table(name="artists")
* @ORM\Entity
*/
class Artist
{
/**
* @var integer $id
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string $name
*
* @ORM\Column(name="name", type="string", length=255)
*/
private $name;
/**
* @var \Doctrine\Common\Collections\ArrayCollection
*
* @ORM\OneToMany(targetEntity="Entities\Video", mappedBy="artist")
*/
private $videos;
public function __construct()
{
$this->videos = new \Doctrine\Common\Collections\ArrayCollection();
}
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* @param string $name
* @return Artist
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
/**
* Add videos
*
* @param Entities\Video $videos
*/
public function addVideo(\Entities\Video $videos)
{
$this->videos[] = $videos;
}
/**
* Get videos
*
* @return Doctrine\Common\Collections\Collection
*/
public function getVideos()
{
return $this->videos;
}
}
ブランド.php
namespace Entities;
use Doctrine\ORM\Mapping as ORM;
/**
* Entities\Brand
*
* @ORM\Table(name="brands")
* @ORM\Entity
*/
class Brand
{
/**
* @var integer $id
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string $name
*
* @ORM\Column(name="name", type="string", length=255)
*/
private $name;
/**
* @var \Doctrine\Common\Collections\ArrayCollection
*
* @ORM\OneToMany(targetEntity="Entities\Car", mappedBy="brand")
*/
private $cars;
public function __construct()
{
$this->cars = new \Doctrine\Common\Collections\ArrayCollection();
}
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* @param string $name
* @return Brand
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
/**
* Add cars
*
* @param Entities\Car $cars
*/
public function addCar(\Entities\Car $cars)
{
$this->cars[] = $cars;
}
/**
* Get cars
*
* @return Doctrine\Common\Collections\Collection
*/
public function getCars()
{
return $this->cars;
}
}
カー.php
namespace Entities;
use Doctrine\ORM\Mapping as ORM;
/**
* Entities\Car
*
* @ORM\Table(name="cars")
* @ORM\Entity
*/
class Car extends Product //Important that Car extends Product
{
/**
* @var string $model
*
* @ORM\Column(name="model", type="string")
*/
private $model;
/**
* @var date $release_date
*
* @ORM\Column(name="release_date", type="date")
*/
private $release_date;
/**
* @var Entities\Brand
*
* @ORM\OneToOne(targetEntity="Entities\Brand")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="brand_id", referencedColumnName="id", unique=true)
* })
*/
private $brand;
/**
* Set model
*
* @param string $model
* @return Car
*/
public function setModel($model)
{
$this->model = $model;
return $this;
}
/**
* Get model
*
* @return string
*/
public function getModel()
{
return $this->model;
}
/**
* Set release_date
*
* @param date $releaseDate
* @return Car
*/
public function setReleaseDate($releaseDate)
{
$this->release_date = $releaseDate;
return $this;
}
/**
* Get release_date
*
* @return date
*/
public function getReleaseDate()
{
return $this->release_date;
}
/**
* Set brand
*
* @param Entities\Brand $brand
* @return Car
*/
public function setBrand(\Entities\Brand $brand = null)
{
$this->brand = $brand;
return $this;
}
/**
* Get brand
*
* @return Entities\Brand
*/
public function getBrand()
{
return $this->brand;
}
}
製品.php
namespace Entities;
use Doctrine\ORM\Mapping as ORM;
/**
* Entities\Product
*
* @ORM\Table(name="products")
* @ORM\InheritanceType("JOINED")
* @ORM\DiscriminatorColumn(name="", type="", length=)
* @ORM\DiscriminatorMap({"video" = "Entities\Video", "car" = "Entities\Car"})
* @ORM\Entity
*/
class Product
{
/**
* @var string $id
*
* @ORM\Column(name="id", type="string")
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string $description
*
* @ORM\Column(name="description", type="string", length=255)
*/
private $description;
/**
* @var decimal $price
*
* @ORM\Column(name="price", type="decimal")
*/
private $price;
/**
* Get id
*
* @return string
*/
public function getId()
{
return $this->id;
}
/**
* Set description
*
* @param string $description
* @return Product
*/
public function setDescription($description)
{
$this->description = $description;
return $this;
}
/**
* Get description
*
* @return string
*/
public function getDescription()
{
return $this->description;
}
/**
* Set price
*
* @param decimal $price
* @return Product
*/
public function setPrice($price)
{
$this->price = $price;
return $this;
}
/**
* Get price
*
* @return decimal
*/
public function getPrice()
{
return $this->price;
}
}
ビデオ.php
namespace Entities;
use Doctrine\ORM\Mapping as ORM;
/**
* Entities\Video
*
* @ORM\Table(name="videos")
* @ORM\Entity
*/
class Video extends Product //Important that Video extends Product
{
/**
* @var string $file_name
*
* @ORM\Column(name="file_name", type="string")
*/
private $file_name;
/**
* @var date $release_date
*
* @ORM\Column(name="release_date", type="date")
*/
private $release_date;
/**
* @var Entities\Artist
*
* @ORM\OneToOne(targetEntity="Entities\Artist")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="artist_id", referencedColumnName="id", unique=true)
* })
*/
private $artist;
/**
* Set file_name
*
* @param string $fileName
* @return Video
*/
public function setFileName($fileName)
{
$this->file_name = $fileName;
return $this;
}
/**
* Get file_name
*
* @return string
*/
public function getFileName()
{
return $this->file_name;
}
/**
* Set release_date
*
* @param date $releaseDate
* @return Video
*/
public function setReleaseDate($releaseDate)
{
$this->release_date = $releaseDate;
return $this;
}
/**
* Get release_date
*
* @return date
*/
public function getReleaseDate()
{
return $this->release_date;
}
/**
* Set artist
*
* @param Entities\Artist $artist
* @return Video
*/
public function setArtist(\Entities\Artist $artist = null)
{
$this->artist = $artist;
return $this;
}
/**
* Get artist
*
* @return Entities\Artist
*/
public function getArtist()
{
return $this->artist;
}
}
3) 新しい車と新しいビデオの作成
これが私の CodeIgniter コントローラーに入っているものです。このコードは、Metallica という名前のアーティストと Ford という名前のブランドを作成したことを前提としています。
public function createVideo()
{
//Instantiate new Entities\Video object
$video = new Entities\Video;
//Since it extends Entities\Product you can set the common Product properties
$video->setDescription('This is a Metallica clip');
$video->setPrice(19.95);
//Setting the custom Video properties
$artist = $this->doctrine->em->getRepository('Entities\Artist')->findOneBy(array('name' => 'Metallica'));
$video->setArtist($artist);
$video->setReleaseDate(new DateTime());
$video->setFileName('metallica.mp4');
//Save
$this->doctrine->em->persist($video);
$this->doctrine->em->flush();
}
public function createCar()
{
//Instantiate new Entities\Car object
$car = new Entities\Car;
//Since it extends Entities\Product you can set the common Product properties
$car->setDescription('This is Ford Mondeo of 2011');
$car->setPrice(19.95);
//Setting the custom Car properties
$brand = $this->doctrine->em->getRepository('Entities\Brand')->findOneBy(array('name' => 'Ford'));
$car->setBrand($brand);
$car->setReleaseDate(DateTime::createFromFormat('Y-m-d', '2011-11-15'));
$car->setModel('Mondeo');
//Save
$this->doctrine->em->persist($car);
$this->doctrine->em->flush();
}
4) 全製品の抽出
すべての製品を抽出する方法の例
public function extractAllProducts()
{
$products = $this->doctrine->em->getRepository('Entities\Product')->findAll();
foreach($products as $product)
{
printf('%s for € %s<br />', $product->getDescription(), $product->getPrice());
}
}
これにより、
This is a Metallica clip for € 19.95
This is Ford Mondeo of 2011 for € 19.95
すべてのビデオを抽出する方法の例
public function extractAllVideos()
{
$videos = $this->doctrine->em->getRepository('Entities\Video')->findAll();
foreach($videos as $video)
{
printf('%s, released %s for € %s<br />', $video->getDescription(), $video->getReleaseDate()->format('Y'), $video->getPrice());
}
}
これにより、
This is a Metallica clip, released 2012 for € 19.95