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doctrine2/cookbook/en/integrating-with-codeigniter.txt
Jonathan H. Wage 1e7193134a -
2010-04-06 14:36:40 -04:00

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This is recipe for using Doctrine 2 in your [CodeIgniter](http://www.codeigniter.com) framework.
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.
[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);
$config->setQueryCacheImpl($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);
}
}
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](http://www.doctrine-project.org/documentation/manual/2_0/en/configuration#configuration-options).
++ 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:
[php]
$em = $this->doctrine->em;
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:
[php]
$this->load->library('doctrine');
Good luck!