Location: PHPKode > projects > DIY Blog > diy-blog/lib/propel/runtime-php4/classes/propel/validator/UniqueValidator.php
<?php
/*
 *  $Id: UniqueValidator.php 536 2007-01-10 14:30:38Z heltem $
 *
 * 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 please see
 * <http://propel.phpdb.org>.
 */

require_once 'propel/validator/BasicValidator.php';

/**
 * A validator for unique column names.
 *
 * <code>
 *   <column name="username" type="VARCHAR" size="25" required="true" />
 *
 *   <validator column="username">
 *     <rule name="unique" message="Username already exists !" />
 *   </validator>
 * </code>
 *
 * @author     Michael Aichler <hide@address.com>
 * @version    $Revision: 536 $
 * @package    propel.validator
 */
class UniqueValidator extends BasicValidator
{

  /**
  * @see        BasicValidator::isValid()
  */
  function isValid ($map, $str)
  {
	$column =& $map->getColumn();

	$c = new Criteria();
	$c->add($column->getFullyQualifiedName(), $str, Criteria::EQUAL());

	$isValid = false;

	$table =& $column->getTable();
	$cmd = sprintf('$isValid = %sPeer::doCount($c) == 0;', $table->getPhpName());
	eval($cmd);

	return $isValid;
  }
}
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