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Merge branch 'MDL-40893-master' of https://github.com/mr-russ/moodle

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This commit is contained in:
Dan Poltawski 2013-08-19 14:50:01 +08:00
commit c3b087ccc3
1 changed files with 24 additions and 18 deletions
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42
backup/moodle2/restore_qtype_plugin.class.php
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@ -35,6 +35,18 @@ defined('MOODLE_INTERNAL') || die();
*/
abstract class restore_qtype_plugin extends restore_plugin {
/*
* A simple answer to id cache for a single questions answers.
* @var array
*/
private $questionanswercache = array();
/*
* The id of the current question in the questionanswercache.
* @var int
*/
private $questionanswercacheid = null;
/**
* Add to $paths the restore_path_elements needed
* to handle question_answers for a given question
@ -147,38 +159,32 @@ abstract class restore_qtype_plugin extends restore_plugin {
// The question existed, we need to map the existing question_answers
} else {
// Look in question_answers by answertext matching
$sql = 'SELECT id
FROM {question_answers}
WHERE question = ?
AND ' . $DB->sql_compare_text('answer', 255) . ' = ' . $DB->sql_compare_text('?', 255);
$params = array($newquestionid, $data->answertext);
$newitemid = $DB->get_field_sql($sql, $params);
// Not able to find the answer, let's try cleaning the answertext
// of all the question answers in DB as slower fallback. MDL-30018.
if (!$newitemid) {
// Have we cached the current question?
if ($this->questionanswercacheid !== $newquestionid) {
// The question changed, purge and start again!
$this->questionanswercache = array();
$params = array('question' => $newquestionid);
$answers = $DB->get_records('question_answers', $params, '', 'id, answer');
$this->questionanswercacheid = $newquestionid;
// Cache all cleaned answers for a simple text match.
foreach ($answers as $answer) {
// Clean in the same way than {@link xml_writer::xml_safe_utf8()}.
// MDL-30018: Clean in the same way as {@link xml_writer::xml_safe_utf8()}.
$clean = preg_replace('/[\x-\x8\xb-\xc\xe-\x1f\x7f]/is','', $answer->answer); // Clean CTRL chars.
$clean = preg_replace("/\r\n|\r/", "\n", $clean); // Normalize line ending.
if ($clean === $data->answertext) {
$newitemid = $data->id;
}
$this->questionanswercache[$clean] = $answer->id;
}
}
// If we haven't found the newitemid, something has gone really wrong, question in DB
// is missing answers, exception
if (!$newitemid) {
if (!isset($this->questionanswercache[$data->answertext])) {
// If we haven't found the matching answer, something has gone really wrong, the question in the DB
// is missing answers, throw an exception.
$info = new stdClass();
$info->filequestionid = $oldquestionid;
$info->dbquestionid = $newquestionid;
$info->answer = $data->answertext;
throw new restore_step_exception('error_question_answers_missing_in_db', $info);
}
$newitemid = $this->questionanswercache[$data->answertext];
}
// Create mapping (we'll use this intensively when restoring question_states. And also answerfeedback files)
$this->set_mapping('question_answer', $oldid, $newitemid);