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176 lines
7.0 KiB
176 lines
7.0 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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* Fix a very weird case where the following queries seem to have been executed
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* twice during a database migration from 1.9 to 1.10
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* UPDATE c_item_property cip SET cip.to_group_id = (SELECT cgi.iid FROM c_group_info cgi WHERE cgi.c_id = cip.c_id AND cgi.id = cip.to_group_id);
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* DELETE FROM c_item_property WHERE to_group_id IS NOT NULL AND to_group_id <> 0 AND to_group_id NOT IN (SELECT iid FROM c_group_info);
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* These queries, as explained in BT#13243, when executed twice, break the
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* relationship of events to groups, and maybe other group resources, and then
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* deletes them.
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*
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* To fix, we need access to the previous database (version 1.9) and an active
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* connection to the migrated database (version 1.11 in this case). The script
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* scans through events in the old database, checks if they still exist in the
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* c_item_property in the new database, and if they don't tries to recreate the
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* c_item_property records needed to recover them.
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*
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* Due to the active use of the v1.11 configuration file through global.inc.php,
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* settings for the old database have to be added manually.
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*/
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/**
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* Context initialization
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*/
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if (PHP_SAPI != 'cli') {
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die('This script can only be executed from the command line');
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}
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require __DIR__.'/../../main/inc/global.inc.php';
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/**
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* Old database configuration
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*/
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$oldDBHost = 'localhost';
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$oldDBName = 'db1.9';
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$oldDBUser = 'db1.9';
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$oldDBPass = 'db1.9';
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try {
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$oldDBH = new PDO('mysql:host=localhost;dbname='.$oldDBName, $oldDBUser, $oldDBPass);
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} catch (PDOException $e) {
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echo "Error connecting to old database: ".$e->getMessage().PHP_EOL;
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}
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/**
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* New database configuration
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*/
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$newDBHost = 'localhost';
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$newDBName = 'db1.11';
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$newDBUser = 'db1.11';
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$newDBPass = 'db1.11';
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try {
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$newDBH = new PDO('mysql:host=localhost;dbname='.$newDBName, $newDBUser, $newDBPass);
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} catch (PDOException $e) {
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echo "Error connecting to new database: ".$e->getMessage().PHP_EOL;
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}
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/**
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* Start looking for group events
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*/
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$foundCount = 0;
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$totalCount = 0;
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// Get a list of groups by course (TODO add sessions support)
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$groups = getOldGroupsByCourse();
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// Set this optional filter to something else than empty if you want to only
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// check items of one course
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$optionalCourseFilter = '';
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$sqlOld = "SELECT * FROM c_item_property WHERE to_group_id IS NOT NULL AND to_group_id != 0";
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if (!empty($optionalCourseFilter)) {
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$sqlOld .= ' AND c_id = '.$optionalCourseFilter;
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}
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foreach ($oldDBH->query($sqlOld) as $oldRow) {
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echo $oldRow['c_id'].' '.$oldRow['id'].' '.$oldRow['tool'].' '.$oldRow['ref'].' '.$oldRow['to_group_id'].PHP_EOL;
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$totalCount++;
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$sessionSubSelect = '';
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$sessionInsert = '';
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if (!empty($oldRow['id_session'])) {
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$sessionSubSelect = ' AND session_id = "'.$oldRow['id_session'].'" ';
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$sessionInsert = $oldRow['id_session'];
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} else {
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$sessionSubSelect = ' AND session_id IS NULL ';
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$sessionInsert = 'NULL';
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}
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$sqlNew = "SELECT iid, to_group_id FROM c_item_property
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WHERE c_id = ".$oldRow['c_id'].
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$sessionSubSelect.
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" AND tool = '".$oldRow['tool']."'
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AND ref = ".$oldRow['ref'];
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//echo trim(str_replace("\n", '', $sqlNew)).PHP_EOL;
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$q = $newDBH->query($sqlNew);
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// Two situations arise: the record is found and is pointing to the wrong group -> update
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// or the record is not found and we need to create it based on the new iid of the old group's id -> insert
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if ($q->rowCount() > 0) {
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$newRow = $q->fetch();
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//echo "--> Found corresponding c_item_property as ".$newRow['iid'].PHP_EOL;
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$foundCount++;
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// First check if the group referenced in the old database still exists.
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// This is originally the c_group_info.id, NOT the c_group_info.iid, so
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// we need to check the existence of a group with that id in course c_id
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// If the group doesn't exist anymore, skip the update/insertion (maybe
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// we should even delete it?)
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if (isset($groups[$oldRow['c_id']][$oldRow['to_group_id']])) {
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$newGroupId = $groups[$oldRow['c_id']][$oldRow['to_group_id']];
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// also check if the new ID is different, otherwise we can avoid an update
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if ($oldRow['to_group_id'] != $newGroupId) {
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// Update this row to attach it to the right group
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$sqlFix = 'UPDATE c_item_property SET to_group_id = '.$newGroupId.' WHERE iid = '.$newRow['iid'];
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//echo $sqlFix.PHP_EOL;
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$newDBH->query($sqlFix);
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}
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}
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} else {
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echo "xx> No corresponding c_item_property found".PHP_EOL;
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// First check if the group referenced in the old database still exists.
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// This is originally the c_group_info.id, NOT the c_group_info.iid, so
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// we need to check the existence of a group with that id in course c_id
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// If the group doesn't exist anymore, skip the update/insertion (maybe
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// we should even delete it?)
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if (isset($groups[$oldRow['c_id']][$oldRow['to_group_id']])) {
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$newGroupId = $groups[$oldRow['c_id']][$oldRow['to_group_id']];
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// Insert a new row to make the group calendar event visible again
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$sqlFix = 'INSERT INTO c_item_property(c_id, to_group_id, to_user_id, '.
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' insert_user_id, session_id, tool, insert_date, lastedit_date, ref,'.
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' lastedit_type, lastedit_user_id, visibility, start_visible, end_visible)'.
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" VALUES ("
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.$oldRow['c_id'].', '
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.$newGroupId.', '
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.' NULL, '
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.$oldRow['insert_user_id'].', '
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.$sessionInsert.', '
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.'\''.$oldRow['tool'].'\', '
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.'\''.$oldRow['insert_date'].'\', '
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.'\''.$oldRow['lastedit_date'].'\', '
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.$oldRow['ref'].', '
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.'\''.$oldRow['lastedit_type'].'\', '
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.$oldRow['lastedit_user_id'].', '
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.$oldRow['visibility'].', '
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.'\''.$oldRow['start_visible'].'\', '
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.'\''.$oldRow['end_visible'].'\''
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.')';
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//echo $sqlFix.PHP_EOL;
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$newDBH->query($sqlFix);
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}
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}
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}
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echo PHP_EOL;
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$diff = $totalCount - $foundCount;
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echo "Found $foundCount corresponding c_item_property on a total of $totalCount items searched for (we're missing $diff)".PHP_EOL;
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/**
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* Helper function to get a list of existing groups from the c_group_info table
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* @return array
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*/
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function getOldGroupsByCourse() {
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global $oldDBH;
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global $newDBH;
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$groups = [];
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$courses = [];
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$sql = "SELECT id FROM course";
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foreach ($oldDBH->query($sql) as $course) {
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$sqlGroup = "SELECT id, iid FROM c_group_info WHERE c_id = ".$course['id'];
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foreach ($newDBH->query($sqlGroup) as $group) {
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if (!isset($courses[$course['id']])) {
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$courses[$course['id']] = [];
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}
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$courses[$course['id']][$group['id']] = $group['iid'];
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}
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}
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return $courses;
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} |