Attachments to Doctrine Jira Issue DDC-383 - https://github.com/doctrine/doctrine2/issues/4678

10712_YamlExportDriver.php

<?php

namespace My\Doctrine;

use Doctrine\ORM\Tools\Export\Driver\YamlExporter,
    Doctrine\ORM\Mapping\ClassMetadataInfo;

/**
 * Modified yaml export driver
 */
class YamlExportDriver extends YamlExporter
{
    /**
     * Base namespace to append
     * @var string
     */
    protected $classNamespace;

    /**
     * {@inheritDoc}
     */
    public function __construct($dir = null)
    {
        parent::__construct($dir);
        $this->classNamespace = 'My\Namespace\Entity\\';
    }

    /**
     * Set the array of ClassMetadataInfo instances to export
     *
     * @param array $metadata
     * @return void
     */
    public function setMetadata(array $metadata)
    {
        $this->_metadata = $metadata;
        /* @var $metadata ClassMetadataInfo */
        foreach ($this->_metadata as &$metadata) {
            $metadata->name = $this->classNamespace . $metadata->name;

            foreach ($metadata->associationMappings as &$associationMapping) {
                /* @var $associationMapping \Doctrine\ORM\Mapping\AssociationMapping */
                $associationMapping->targetEntityName = $this->classNamespace . $associationMapping->targetEntityName;
                $associationMapping->sourceEntityName = $this->classNamespace . $associationMapping->sourceEntityName;

                foreach ($associationMapping->joinColumnFieldNames as $joinColumnFieldName) {
                    $fieldName = $metadata->fieldNames[$joinColumnFieldName];
                    unset($metadata->fieldMappings[$fieldName]);
                    unset($metadata->fieldNames[$joinColumnFieldName]);
                    unset($metadata->columnNames[$fieldName]);
                }
            }
        }
    }
}