mirror of
https://github.com/Part-DB/Part-DB-server.git
synced 2025-06-23 18:28:49 +02:00
55 lines
2.4 KiB
PHP
55 lines
2.4 KiB
PHP
<?php
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declare(strict_types=1);
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/*
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* This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
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*
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* Copyright (C) 2019 - 2023 Jan Böhmer (https://github.com/jbtronics)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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namespace App\DataTables\Adapters;
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use Doctrine\ORM\QueryBuilder;
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use Doctrine\ORM\Tools\Pagination\Paginator;
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use Omines\DataTablesBundle\Adapter\Doctrine\FetchJoinORMAdapter;
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/**
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* This class is a workaround for a bug (or edge case behavior) in the FetchJoinORMAdapter or better the used Paginator
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* and CountOutputWalker.
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* If the query contains multiple GROUP BY clauses, the result of the count query is wrong, as some lines are counted
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* multiple times. This is because the CountOutputWalker does not use DISTINCT in the count query, if it contains a GROUP BY.
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*
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* We work around this by removing the GROUP BY clause from the query, and only adding the first root alias as GROUP BY (the part table).
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* This way we get the correct count, without breaking the query (we need a GROUP BY for the HAVING clauses).
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*
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* As a side effect this also seems to improve the performance of the count query a bit (which makes up a lot of the total query time).
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*/
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class CustomFetchJoinORMAdapter extends FetchJoinORMAdapter
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{
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public function getCount(QueryBuilder $queryBuilder, $identifier): int
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{
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$qb_without_group_by = clone $queryBuilder;
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//Remove the groupBy clause from the query for the count
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//And add the root alias as group by, so we can use HAVING clauses
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$qb_without_group_by->resetDQLPart('groupBy');
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$qb_without_group_by->addGroupBy($queryBuilder->getRootAliases()[0]);
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$paginator = new Paginator($qb_without_group_by);
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return $paginator->count();
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}
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}
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