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Integrating with CodeIgniter

This is recipe for using Doctrine 2 in your CodeIgniter framework.

This might not work for all CodeIgniter versions and may require slight adjustments.

Here is how to set it up:

Make a CodeIgniter library that is both a wrapper and a bootstrap for Doctrine 2.

Setting up the file structure

Here are the steps:

  • Add a php file to your system/application/libraries folder called Doctrine.php. This is going to be your wrapper/bootstrap for the D2 entity manager.
  • Put the Doctrine folder (the one that contains Common, DBAL, and ORM) inside that same libraries folder.
  • Your system/application/libraries folder now looks like this: system/applications/libraries -Doctrine -Doctrine.php -index.html
  • If you want, open your config/autoload.php file and autoload your Doctrine library. <?php $autoload['libraries'] = array('doctrine');

Creating your Doctrine CodeIgniter library

Now, here is what your Doctrine.php file should look like. Customize it to your needs.

1<?php use Doctrine\Common\ClassLoader, Doctrine\ORM\Configuration, Doctrine\ORM\EntityManager, Doctrine\Common\Cache\ArrayCache, Doctrine\DBAL\Logging\EchoSQLLogger; class Doctrine { public $em = null; public function __construct() { // load database configuration from CodeIgniter require_once APPPATH.'config/database.php'; // Set up class loading. You could use different autoloaders, provided by your favorite framework, // if you want to. require_once APPPATH.'libraries/Doctrine/Common/ClassLoader.php'; $doctrineClassLoader = new ClassLoader('Doctrine', APPPATH.'libraries'); $doctrineClassLoader->register(); $entitiesClassLoader = new ClassLoader('models', rtrim(APPPATH, "/" )); $entitiesClassLoader->register(); $proxiesClassLoader = new ClassLoader('Proxies', APPPATH.'models/proxies'); $proxiesClassLoader->register(); // Set up caches $config = new Configuration; $cache = new ArrayCache; $config->setMetadataCacheImpl($cache); $driverImpl = $config->newDefaultAnnotationDriver(array(APPPATH.'models/Entities')); $config->setMetadataDriverImpl($driverImpl); $config->setQueryCacheImpl($cache); $config->setQueryCacheImpl($cache); // Proxy configuration $config->setProxyDir(APPPATH.'/models/proxies'); $config->setProxyNamespace('Proxies'); // Set up logger $logger = new EchoSQLLogger; $config->setSQLLogger($logger); $config->setAutoGenerateProxyClasses( TRUE ); // Database connection information $connectionOptions = array( 'driver' => 'pdo_mysql', 'user' => $db['default']['username'], 'password' => $db['default']['password'], 'host' => $db['default']['hostname'], 'dbname' => $db['default']['database'] ); // Create EntityManager $this->em = EntityManager::create($connectionOptions, $config); } }
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Please note that this is a development configuration; for a production system you'll want to use a real caching system like APC, get rid of EchoSqlLogger, and turn off autoGenerateProxyClasses.

For more details, consult the Doctrine 2 Configuration documentation.

Now to use it

Whenever you need a reference to the entity manager inside one of your controllers, views, or models you can do this:

1<?php $em = $this->doctrine->em;
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That's all there is to it. Once you get the reference to your EntityManager do your Doctrine 2.0 voodoo as normal.

Note: If you do not choose to autoload the Doctrine library, you will need to put this line before you get a reference to it:

1<?php $this->load->library('doctrine');
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Good luck!