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95 lines
4.0 KiB
PHP
95 lines
4.0 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// 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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// Moodle 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Upgrade helper code for the quiz module.
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*
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* @package mod
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* @subpackage quiz
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* @copyright 2006 Eloy Lafuente (stronk7)
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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require_once($CFG->dirroot . '/mod/quiz/locallib.php');
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/**
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* Upgrade states for an attempt to Moodle 1.5 model
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*
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* Any state that does not yet have its timestamp set to nonzero has not yet been
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* upgraded from Moodle 1.4. The reason these are still around is that for large
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* sites it would have taken too long to upgrade all states at once. This function
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* sets the timestamp field and creates an entry in the question_sessions table.
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* @param object $attempt The attempt whose states need upgrading
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*/
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function quiz_upgrade_very_old_question_sessions($attempt) {
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global $DB;
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// The old quiz model only allowed a single response per quiz attempt so that there will be
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// only one state record per question for this attempt.
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// We set the timestamp of all states to the timemodified field of the attempt.
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$DB->execute("UPDATE {question_states} SET timestamp = ? WHERE attempt = ?",
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array($attempt->timemodified, $attempt->uniqueid));
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// For each state we create an entry in the question_sessions table, with both newest and
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// newgraded pointing to this state.
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// Actually we only do this for states whose question is actually listed in $attempt->layout.
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// We do not do it for states associated to wrapped questions like for example the questions
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// used by a random question
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$session = new stdClass();
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$session->attemptid = $attempt->uniqueid;
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$session->sumpenalty = 0;
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$session->manualcomment = '';
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$session->manualcommentformat = FORMAT_HTML;
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$session->flagged = 0;
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$questionlist = str_replace(',0', '', quiz_clean_layout($attempt->layout, true));
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if (!$questionlist) {
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return;
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}
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list($usql, $question_params) = $DB->get_in_or_equal(explode(',', $questionlist));
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$params = array_merge(array($attempt->uniqueid), $question_params);
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if ($states = $DB->get_records_select('question_states',
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"attempt = ? AND question $usql", $params)) {
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foreach ($states as $state) {
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if ($DB->record_exists('question_sessions',
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array('attemptid' => $attempt->uniqueid, 'questionid' => $state->question))) {
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// It was possible for the code to get here when some of the necessary
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// question_sessions were already in the database. That lead to a
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// unique key violation, so we manually detect and avoid that.
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continue;
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}
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$session->newgraded = $state->id;
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$session->newest = $state->id;
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$session->questionid = $state->question;
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$DB->insert_record('question_sessions', $session, false);
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}
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}
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// It was possible to have old question_states records for this attempt but
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// pointing to questionids that were no longer in quiz_attempt->layout.
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// That makes no sense, and will break things later in the upgrade, so delete
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// those now.
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list($qidsql, $params) = $DB->get_in_or_equal(explode(',', $questionlist),
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SQL_PARAMS_QM, 'param', false);
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$params[] = $attempt->uniqueid;
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$DB->delete_records_select('question_states', "question $usql AND attempt = ?", $params);
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}
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