52 lines
2.0 KiB
Plaintext
52 lines
2.0 KiB
Plaintext
This recipe is intended as an example of implementing a loadClassMetadata listener to provide a Table Prefix option for your application. The method used below is not a hack, but fully integrates into the Doctrine system, all SQL generated will include the appropriate table prefix.
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In most circumstances it is desirable to separate different applications into individual databases, but in certain cases, it may be beneficial to have a table prefix for your Entities to separate them from other vendor products in the same database.
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++ Implementing the listener
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The listener in this example has been set up with the DoctrineExtensions namespace. You create this file in your library/DoctrineExtensions directory, but will need to set up appropriate autoloaders.
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[php]
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<?php
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namespace DoctrineExtensions;
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use \Doctrine\ORM\Event\LoadClassMetadataEventArgs;
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class TablePrefix
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{
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protected $_prefix = '';
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public function __construct($prefix)
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{
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$this->_prefix = (string) $prefix;
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}
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public function loadClassMetadata(LoadClassMetadataEventArgs $eventArgs)
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{
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$classMetadata = $eventArgs->getClassMetadata();
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$classMetadata->setTableName($this->_prefix . $classMetadata->getTableName());
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}
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}
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++ Telling the EntityManager about our listener
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A listener of this type must be set up before the EntityManager has been initialised, otherwise an Entity might be created or cached before the prefix has been set.
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> **Note**
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> If you set this listener up, be aware that you will need to clear your caches
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> and drop then recreate your database schema.
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[php]
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<?php
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// $connectionOptions and $config set earlier
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$evm = new \Doctrine\Common\EventManager;
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// Table Prefix
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$tablePrefix = new \DoctrineExtensions\TablePrefix('prefix_');
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$evm->addEventListener(\Doctrine\ORM\Events::loadClassMetadata, $tablePrefix);
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$em = \Doctrine\ORM\EntityManager::create($connectionOptions, $config, $evm);
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