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Taggable Behavior for Doctrine2

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README.md

Doctrine Extensions Taggable

This repository contains the Taggable extension for Doctrine 2. This allows to add tags on your doctrine entities easily.

Use

Implement the DoctrineExtensions\Taggable\Taggable interface.

First, your entity must implement the DoctrineExtensions\Taggable\Taggable interface. Three methods in your entity must be written:

  • getTaggableType() must return an unique name for your entity model
  • getTaggableId() must return an unique identifier for your entity
  • getTags() must return a doctrine collection (Doctrine\Common\Collections\Collection)

Example:

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;
    }
}

Setup Doctrine

Finally, you need to setup doctrine for register metadata directory and register TagListener.

First, register the metadata directory of this package.

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

or with 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');

Then, register the TagListener.

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

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

Using TagManager

Now, you can use 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);

Tag-related queries

The Tag entity has a repository class, with two particularly helpful methods:

<?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);
    }
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