James McFadden {web developer}

Overriding Doctrine Types

Sometimes you want to override Doctrine types. For instance, if you have a child project that must adhere to a parent project’s Entity Annotations, but you want to use a different class for the Doctrine return value (than the one specified in the parent project), overriding the existing Doctrine type can help.

If you simply try to register a new type when a type of the same name has already been registered, you’ll get an exception along the lines of:

Type mydoctrinetype already exists.

A method that some people might not know about (at least I didn’t) is DBAL\Types\Type::overrideType(). This pretty much solves the problem; although it doesn’t assume you wish to register the new type even if a previous one wasn’t already added:

Type to be overwritten mydoctrinetype does not exist

So a little more is required:

\Doctrine\DBAL\Types\Type::getTypesMap();

This will get you an array of key value pairs of the currently registered type names and their namespaces, and so you can do a quick check to see which function you should be calling:

$type = "mydoctrinetype";
$typeNamespace = "my\doctrine\type";
$typeClass = "MyDoctrineType";
$registeredTypes = \Doctrine\DBAL\Types\Type::getTypesMap();

if(array_key_exists($type, $registeredTypes)) {
    Doctrine\DBAL\Types\Type::overrideType($type, $typeNamespace);
} else {
    Doctrine\DBAL\Types\Type::addType($type, $typeNamespace);
}
$entityManager->getConnection()->getDatabasePlatform()->registerDoctrineTypeMapping($typeClass, $type);

Providing your Type class is setup correctly, you should see Doctrine correctly uses your new Type in place of it’s parent.

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