README

Cycle ORM 通过使用 cycle/orm-promise-mapper 包和 \Cycle\ORM\Reference\Promise 对象来实现关系的懒加载，提供了在特定类实例间携带数据的能力。

安装

安装此包的首选方式是通过 Composer

composer require cycle/orm-promise-mapper

定义实体

use Cycle\Annotated\Annotation\Entity;
use Cycle\Annotated\Annotation\Column;
use Cycle\Annotated\Annotation\Relation\BelongsTo;
use Cycle\Annotated\Annotation\Relation\HasMany;
use Cycle\ORM\Reference\ReferenceInterface;

#[Entity]
class User
{
    #[Column(type: 'primary')]
    public int $id;

    #[HasMany(target: Post::class, load: 'eager')]
    public array $posts;
    
    #[HasMany(target: Tag::class, load: 'lazy')]
    public ReferenceInterface|array $tags;
}

#[Entity]
class Post
{
    // ...

    #[BelongsTo(target: User::class, load: 'lazy')]
    public ReferenceInterface|User $user;

    #[BelongsTo(target: Tag::class, load: 'eager')]
    public Tag $tag;
}

获取实体数据

$user = $orm->getRepository('user')->findByPK(1);

// $user->posts contains an array because of eager loading
foreach ($user->posts as $post) {
    // ...
}

// $user->tags contains Cycle\ORM\Reference\Promise object because of lazy loading
$tags = $user->tags->fetch();
foreach ($tags as $post) {
    // ...
}

$post = $orm->getRepository('post')->findByPK(1);

// $post->user contains Cycle\ORM\Reference\Promise object because of lazy loading
$userId = $post->user->fetch()->id;

// $post->tag contains Tag object because of eager loading
$tagName = $post->tag->name;

许可证

MIT 许可证 (MIT)。更多信息请参阅 LICENSE。由 Spiral Scout 维护。