mirror of
https://github.com/moodle/moodle.git
synced 2025-07-25 00:02:18 +02:00
25596a50e5
This avoids the needs for plugins to do separate queries, which is easier for them, and better performing.
78 lines
3.3 KiB
PHP
78 lines
3.3 KiB
PHP
<?php
|
|
// This file is part of Moodle - http://moodle.org/
|
|
//
|
|
// Moodle is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// Moodle is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
namespace core_question;
|
|
|
|
use core_question\local\bank\question_version_status;
|
|
|
|
/**
|
|
* This class should provide an API for managing question_references.
|
|
*
|
|
* Unfortunately, question_references were introduced in the DB structure
|
|
* without an nice API. This class is being added later, and is currently
|
|
* terribly incomplete, but hopefully it can be improved in time.
|
|
*
|
|
* @package core_question
|
|
* @copyright 2023 The Open University
|
|
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
|
|
*/
|
|
class question_reference_manager {
|
|
/**
|
|
* Return a list of those questions from the list passed in, which are referenced.
|
|
*
|
|
* A question is referenced if either:
|
|
* - There is a question_reference pointing at exactly that version of that question; or
|
|
* - There is an 'always latest' reference, and the question id is the latest non-draft version
|
|
* of that question_bank_entry.
|
|
*
|
|
* @param array $questionids a list of question ids to check.
|
|
* @return array a list of the question ids from the input array which are referenced.
|
|
*/
|
|
public static function questions_with_references(array $questionids): array {
|
|
global $DB;
|
|
|
|
if (empty($questionids)) {
|
|
return [];
|
|
}
|
|
|
|
[$qidtest, $params] = $DB->get_in_or_equal($questionids, SQL_PARAMS_NAMED, 'outerqid');
|
|
[$lqidtest, $lparams] = $DB->get_in_or_equal($questionids, SQL_PARAMS_NAMED, 'innerqid');
|
|
|
|
return $DB->get_fieldset_sql("
|
|
SELECT qv.questionid
|
|
|
|
FROM {question_versions} qv
|
|
|
|
-- This is a performant to get the latest non-draft version for each
|
|
-- question_bank_entry that relates to one of our questionids.
|
|
LEFT JOIN (
|
|
SELECT lqv.questionbankentryid,
|
|
MAX(lv.version) AS latestusableversion
|
|
FROM {question_versions} lqv
|
|
JOIN {question_versions} lv ON lv.questionbankentryid = lqv.questionbankentryid
|
|
WHERE lqv.questionid $lqidtest
|
|
AND lv.status <> :draft
|
|
GROUP BY lqv.questionbankentryid
|
|
) latestversions ON latestversions.questionbankentryid = qv.questionbankentryid
|
|
|
|
JOIN {question_references} qr ON qr.questionbankentryid = qv.questionbankentryid
|
|
AND (qr.version = qv.version OR qr.version IS NULL AND qv.version = latestversions.latestusableversion)
|
|
|
|
WHERE qv.questionid $qidtest
|
|
", array_merge($params, $lparams, ['draft' => question_version_status::QUESTION_STATUS_DRAFT]));
|
|
}
|
|
}
|