91 lines
3.1 KiB
PHP
91 lines
3.1 KiB
PHP
<?php
|
|
/**
|
|
* Doctrine ORM
|
|
*
|
|
* LICENSE
|
|
*
|
|
* This source file is subject to the new BSD license that is bundled
|
|
* with this package in the file LICENSE.txt.
|
|
* 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 kontakt@beberlei.de so I can send you a copy immediately.
|
|
*/
|
|
|
|
namespace Doctrine\ORM\Tools\Pagination;
|
|
|
|
use Doctrine\ORM\Query\TreeWalkerAdapter;
|
|
use Doctrine\ORM\Query\AST\SelectStatement;
|
|
use Doctrine\ORM\Query\AST\SelectExpression;
|
|
use Doctrine\ORM\Query\AST\PathExpression;
|
|
use Doctrine\ORM\Query\AST\AggregateExpression;
|
|
|
|
/**
|
|
* Replaces the selectClause of the AST with a COUNT statement
|
|
*
|
|
* @category DoctrineExtensions
|
|
* @package DoctrineExtensions\Paginate
|
|
* @author David Abdemoulaie <dave@hobodave.com>
|
|
* @copyright Copyright (c) 2010 David Abdemoulaie (http://hobodave.com/)
|
|
* @license http://hobodave.com/license.txt New BSD License
|
|
*/
|
|
class CountWalker extends TreeWalkerAdapter
|
|
{
|
|
/**
|
|
* Distinct mode hint name
|
|
*/
|
|
const HINT_DISTINCT = 'doctrine_paginator.distinct';
|
|
|
|
/**
|
|
* Walks down a SelectStatement AST node, modifying it to retrieve a COUNT
|
|
*
|
|
* @param SelectStatement $AST
|
|
* @return void
|
|
*/
|
|
public function walkSelectStatement(SelectStatement $AST)
|
|
{
|
|
if ($AST->havingClause) {
|
|
throw new \RuntimeException('Cannot count query that uses a HAVING clause. Use the output walkers for pagination');
|
|
}
|
|
|
|
$rootComponents = array();
|
|
foreach ($this->_getQueryComponents() as $dqlAlias => $qComp) {
|
|
$isParent = array_key_exists('parent', $qComp)
|
|
&& $qComp['parent'] === null
|
|
&& $qComp['nestingLevel'] == 0
|
|
;
|
|
if ($isParent) {
|
|
$rootComponents[] = array($dqlAlias => $qComp);
|
|
}
|
|
}
|
|
if (count($rootComponents) > 1) {
|
|
throw new \RuntimeException("Cannot count query which selects two FROM components, cannot make distinction");
|
|
}
|
|
$root = reset($rootComponents);
|
|
$parentName = key($root);
|
|
$parent = current($root);
|
|
$identifierFieldName = $parent['metadata']->getSingleIdentifierFieldName();
|
|
|
|
$pathType = PathExpression::TYPE_STATE_FIELD;
|
|
if (isset($parent['metadata']->associationMappings[$identifierFieldName])) {
|
|
$pathType = PathExpression::TYPE_SINGLE_VALUED_ASSOCIATION;
|
|
}
|
|
|
|
$pathExpression = new PathExpression(
|
|
PathExpression::TYPE_STATE_FIELD | PathExpression::TYPE_SINGLE_VALUED_ASSOCIATION, $parentName,
|
|
$identifierFieldName
|
|
);
|
|
$pathExpression->type = $pathType;
|
|
|
|
$distinct = $this->_getQuery()->getHint(self::HINT_DISTINCT);
|
|
$AST->selectClause->selectExpressions = array(
|
|
new SelectExpression(
|
|
new AggregateExpression('count', $pathExpression, $distinct), null
|
|
)
|
|
);
|
|
|
|
// ORDER BY is not needed, only increases query execution through unnecessary sorting.
|
|
$AST->orderByClause = null;
|
|
}
|
|
}
|
|
|