README

此仓库包含 Doctrine 2 的 Taggable 扩展。这允许您轻松地为 doctrine 实体添加标签。

使用方法

实现 DoctrineExtensions\Taggable\Taggable 接口。

首先，您的实体必须实现 DoctrineExtensions\Taggable\Taggable 接口。在您的实体中必须编写三个方法

• getTaggableType() 必须返回实体模型的唯一名称
• getTaggableId() 必须返回实体的唯一标识符
• getTags() 必须返回 doctrine 集合（Doctrine\Common\Collections\Collection）

示例

namespace MyProject;

use DoctrineExtensions\Taggable\Taggable;
use Doctrine\Common\Collections\ArrayCollection;

/**
 * @Entity
 */
class Article implements Taggable
{
    /**
     * @Id
     * @GeneratedValue
     * @Column(type="integer")
     */
    public $id;

    /**
     * @Column(name="title", type="string", length=50)
     */
    public $title;

    protected $tags;

    public function getId()
    {
        return $this->id;
    }

    public function setTitle($title)
    {
        return $this->title = $title;
    }

    public function getTaggableType()
    {
        return 'article';
    }

    public function getTaggableId()
    {
        return $this->getId();
    }

    public function getTags()
    {
        $this->tags = $this->tags ?: new ArrayCollection();
        return $this->tags;
    }
}

设置 Doctrine

最后，您需要设置 doctrine 以注册元数据目录并注册 TagListener。

首先，注册此包的元数据目录。

$config = new \Doctrine\ORM\Configuration();
// ...
$driverImpl = new \Doctrine\ORM\Mapping\Driver\XmlDriver(array('/path/to/doctrine-extensions-taggable/metadata'));
$config->setMetadataDriverImpl($driverImpl);

或者使用 DriverChain

$driverImpl = new \Doctrine\ORM\Mapping\Driver\DriverChain();
// ...
$driverImpl->addDriver(new \Doctrine\ORM\Mapping\Driver\XmlDriver('/path/to/doctrine-extensions-taggable/metadata'), 'DoctrineExtensions\\Taggable\\Entity');

然后，注册 TagListener。

// $this->em = EntityManager::create($connection, $config);
// ...

$this->tagManager = new TagManager($this->em);
$this->em->getEventManager()->addEventSubscriber(new TagListener($this->tagManager));

使用 TagManager

现在，您可以使用 TagManager。

// Load or create a new tag
$tag = $this->tagManager->loadOrCreateTag('Smallville');

// Load or create a list of tags
$tagNames = $this->tagManager->splitTagNames('Clark Kent, Loïs Lane, Superman'));
$tags = $this->tagManager->loadOrCreateTags($tagNames);

// Add a tag on your taggable resource..
$this->tagManager->addTag($tag, $article);

// Add a list of tags on your taggable resource..
$this->tagManager->addTags($tags, $article);

// Remove a tog on your taggable resource..
$this->tagManager->remove($tag, $article);

// Save tagging..
// Note: $article must be saved in your database before (persist & flush)
$this->tagManager->saveTagging($article);

// Load tagging..
$this->tagManager->loadTagging($article);

// Replace all current tags..
$tags = $this->tagManager->loadOrCreateTags(array('Smallville', 'Superman'));
$this->tagManager->replaceTags($tags, $article);

与标签相关的查询

标签实体有一个仓库类，其中有两个特别有用的方法

<?php

    // somewhere crate or already have the entity manager
    // $em = EntityManager::create($connection, $config);

    $tagRepo = $em->getRepository('DoctrineExtensions\\Taggable\\Entity\\Tag');

    // find all article ids matching a particular query
    $ids = $tagRepo->getResourceIdsForTag('article_type', 'footag');

    // get the tags and count for all articles
    $tags = $tagRepo->getTagsWithCountArray('article_type');
    foreach ($tags as $name => $count) {
        echo sprintf('The tag "%s" matches "%s" articles', $name, $count);
    }