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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Validate
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Abstract.php 18951 2009-11-12 16:26:19Z alexander $
*/
/**
* @see Zend_Validate_Abstract
*/
require_once 'Zend/Validate/Abstract.php';
/**
* Class for Database record validation
*
* @category Zend
* @package Zend_Validate
* @uses Zend_Validate_Abstract
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
abstract class Zend_Validate_Db_Abstract extends Zend_Validate_Abstract
{
/**
* Error constants
*/
const ERROR_NO_RECORD_FOUND = 'noRecordFound';
const ERROR_RECORD_FOUND = 'recordFound';
/**
* @var array Message templates
*/
protected $_messageTemplates = array(self::ERROR_NO_RECORD_FOUND => 'No record matching %value% was found',
self::ERROR_RECORD_FOUND => 'A record matching %value% was found');
/**
* @var string
*/
protected $_schema = null;
/**
* @var string
*/
protected $_table = '';
/**
* @var string
*/
protected $_field = '';
/**
* @var mixed
*/
protected $_exclude = null;
/**
* Database adapter to use. If null isValid() will use Zend_Db::getInstance instead
*
* @var unknown_type
*/
protected $_adapter = null;
/**
* Provides basic configuration for use with Zend_Validate_Db Validators
* Setting $exclude allows a single record to be excluded from matching.
* Exclude can either be a String containing a where clause, or an array with `field` and `value` keys
* to define the where clause added to the sql.
* A database adapter may optionally be supplied to avoid using the registered default adapter.
*
* @param string||array $table The database table to validate against, or array with table and schema keys
* @param string $field The field to check for a match
* @param string||array $exclude An optional where clause or field/value pair to exclude from the query
* @param Zend_Db_Adapter_Abstract $adapter An optional database adapter to use.
*/
public function __construct($table, $field, $exclude = null, Zend_Db_Adapter_Abstract $adapter = null)
{
if ($adapter !== null) {
$this->_adapter = $adapter;
}
$this->_exclude = $exclude;
$this->_field = (string) $field;
if (is_array($table)) {
$this->_table = (isset($table['table'])) ? $table['table'] : '';
$this->_schema = (isset($table['schema'])) ? $table['schema'] : null;
} else {
$this->_table = (string) $table;
}
}
/**
* Run query and returns matches, or null if no matches are found.
*
* @param String $value
* @return Array when matches are found.
*/
protected function _query($value)
{
/**
* Check for an adapter being defined. if not, fetch the default adapter.
*/
if ($this->_adapter === null) {
$this->_adapter = Zend_Db_Table_Abstract::getDefaultAdapter();
if (null === $this->_adapter) {
require_once 'Zend/Validate/Exception.php';
throw new Zend_Validate_Exception('No database adapter present');
}
}
/**
* Build select object
*/
$select = new Zend_Db_Select($this->_adapter);
$select->from($this->_table, array($this->_field), $this->_schema)
->where($this->_adapter->quoteIdentifier($this->_field).' = ?', $value);
if ($this->_exclude !== null) {
if (is_array($this->_exclude)) {
$select->where($this->_adapter->quoteIdentifier($this->_exclude['field']).' != ?', $this->_exclude['value']);
} else {
$select->where($this->_exclude);
}
}
$select->limit(1);
/**
* Run query
*/
$result = $this->_adapter->fetchRow($select, array(), Zend_Db::FETCH_ASSOC);
return $result;
}
}
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