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doctrine2/lib/Doctrine/Validator/Unique.php

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<?php
/*
* $Id$
*
* 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.phpdoctrine.com>.
*/
/**
* Doctrine_Validator_Unique
*
* @package Doctrine
* @category Object Relational Mapping
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link www.phpdoctrine.com
* @since 1.0
* @version $Revision$
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
class Doctrine_Validator_Unique
{
/**
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* checks if given value is unique
*
* @param mixed $value
* @return boolean
*/
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public function validate($value)
{
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$table = $this->invoker->getTable();
$pks = $table->getIdentifier();
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if ( is_array($pks) ) {
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$pks = join(',', $pks);
}
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$sql = 'SELECT ' . $pks . ' FROM ' . $table->getTableName() . ' WHERE ' . $this->field . ' = ?';
$values = array();
$values[] = $value;
// If the record is not new we need to add primary key checks because its ok if the
// unique value already exists in the database IF the record in the database is the same
// as the one that is validated here.
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$state = $this->invoker->state();
if (! ($state == Doctrine_Record::STATE_TDIRTY || $state == Doctrine_Record::STATE_TCLEAN)) {
foreach ($table->getPrimaryKeys() as $pk) {
$sql .= " AND {$pk} != ?";
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$values[] = $this->invoker->$pk;
}
}
$stmt = $table->getConnection()->getDbh()->prepare($sql);
$stmt->execute($values);
return ( ! is_array($stmt->fetch()));
}
}