How to change and entity type in Doctrine2 CTI Inheritance

Question

How (if possible at all) do you change the entity type with Doctrine2, using it\'s Class Table Inheritance?

Let\'s say I have a Person parent class type

Answer 1

You could do something like this though:

This Trait can be used on your Repository class:

namespace App\Doctrine\Repository;

trait DiscriminatorTrait
{
    abstract public function getClassMetadata();

    abstract public function getEntityManager();

    private function updateDiscriminatorColumn($id, $class)
    {
        $classMetadata = $this->getClassMetadata();

        if (!in_array($class, $classMetadata->discriminatorMap)) {
            throw new \Exception("invalid discriminator class: " . $class);
        }

        $identifier = $classMetadata->fieldMappings[$classMetadata->identifier[0]]["columnName"];

        $column = $classMetadata->discriminatorColumn["fieldName"];
        $value = array_search($class, $classMetadata->discriminatorMap);

        $connection = $this->getEntityManager()->getConnection();

        $connection->update(
            $classMetadata->table["name"],
            [$column => $value],
            [$identifier => $id]
        );
    }
}

There still might be some extra work you need to put in, like clearing values in fields that are only present on one of your sub-classes