95 lines
3.6 KiB
PHP
95 lines
3.6 KiB
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 MIT license. For more information, see
|
|
* <http://www.doctrine-project.org>.
|
|
*/
|
|
|
|
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
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
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');
|
|
}
|
|
|
|
$queryComponents = $this->_getQueryComponents();
|
|
// Get the root entity and alias from the AST fromClause
|
|
$from = $AST->fromClause->identificationVariableDeclarations;
|
|
|
|
if (count($from) > 1) {
|
|
throw new \RuntimeException("Cannot count query which selects two FROM components, cannot make distinction");
|
|
}
|
|
|
|
$fromRoot = reset($from);
|
|
$rootAlias = $fromRoot->rangeVariableDeclaration->aliasIdentificationVariable;
|
|
$rootClass = $queryComponents[$rootAlias]['metadata'];
|
|
$identifierFieldName = $rootClass->getSingleIdentifierFieldName();
|
|
|
|
$pathType = PathExpression::TYPE_STATE_FIELD;
|
|
if (isset($rootClass->associationMappings[$identifierFieldName])) {
|
|
$pathType = PathExpression::TYPE_SINGLE_VALUED_ASSOCIATION;
|
|
}
|
|
|
|
$pathExpression = new PathExpression(
|
|
PathExpression::TYPE_STATE_FIELD | PathExpression::TYPE_SINGLE_VALUED_ASSOCIATION, $rootAlias,
|
|
$identifierFieldName
|
|
);
|
|
$pathExpression->type = $pathType;
|
|
|
|
$distinct = $this->_getQuery()->getHint(self::HINT_DISTINCT);
|
|
$AST->selectClause->selectExpressions = [
|
|
new SelectExpression(
|
|
new AggregateExpression('count', $pathExpression, $distinct), null
|
|
)
|
|
];
|
|
|
|
// ORDER BY is not needed, only increases query execution through unnecessary sorting.
|
|
$AST->orderByClause = null;
|
|
}
|
|
}
|
|
|