Doctrine 2, BLOB datatype implementation

Blob.php

<?php
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the LGPL. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\DBAL\Types;

use Doctrine\DBAL\Platforms\AbstractPlatform;

/**
 * Type that maps a PHP binary data to a blob SQL type.
 *
 * @since 2.0
 * @author Roman Sklenar <[email protected]>
 */
class Blob extends Type
{
	const BLOB = 'blog';

    public function getName()
    {
        return self::BLOB;
    }

    public function getSQLDeclaration(array $fieldDeclaration, AbstractPlatform $platform)
    {
        return $platform->getDoctrineTypeMapping('BLOB');
    }

    public function convertToDatabaseValue($value, AbstractPlatform $platform)
    {
        return ($value === null) ? null : base64_encode($value);
    }

    public function convertToPHPValue($value, AbstractPlatform $platform)
    {
        return ($value === null) ? null : base64_decode($value);
    }
}

bootstrap.php

<?php

// ...
$em = Doctrine\ORM\EntityManager::create($conn, $config, $evm);

// types registration
Doctrine\DBAL\Types\Type::addType('blob', 'Doctrine\DBAL\Types\Blob');
$em->getConnection()->getDatabasePlatform()->registerDoctrineTypeMapping('BLOB', 'blob');

Photo.php

<?php

namespace Entities;


/**
 * @Entity
 * @Table(name="Photos")
 */
class Photo extends Base
{
	/** @Column(type="integer") @Id @GeneratedValue */
	protected $id;

	// ...

	/** @Column(type="blob") */
	protected $data;


	/**
	 * Converts instance to Nette\Image.
	 *
	 * @return Image
	 */
	public function toImage() {
		return Nette\Image::fromString($this->data);
	}
}

We have had problems using this implementation when we tried to duplicate entries in the database by copying/cloning. The operation always resulted in a 0-sized entry in the blob field.

Once you add an is_file()-check and decide from there it was working however.

How I can get value from parameters.yml in Class *** extended Type? I need to take public key for RSA encrypt.