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Created the fix_orphaned_questions() function.

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Used before execute the backup of a course to enforce integrity.

Perhaps this function should go to central code and be executed
at upgrade time (and be available in health center too!).

See bug 2380
(http://moodle.org/bugs/bug.php?op=show&bugid=2380)
This commit is contained in:
stronk7 2005-02-15 19:51:01 +00:00
parent 29acd3efbc
commit e8cddb8e6c
1 changed files with 42 additions and 1 deletions
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43
backup/backuplib.php
View file

@ -6,7 +6,10 @@
//Insert necessary category ids to backup_ids table
function insert_category_ids ($course,$backup_unique_code) {
global $CFG;
$status = true;
//Create missing categories and reasign orphaned questions
fix_orphaned_questions($course);
$status = execute_sql("INSERT INTO {$CFG->prefix}backup_ids
(backup_code, table_name, old_id)
SELECT DISTINCT $backup_unique_code,'quiz_categories',t.category
@ -18,6 +21,44 @@
g.question = t.id",false);
return $status;
}
//This function is used to detect orphaned questions (pointing to a
//non existing category) and to recreate such category. This function
//is used by the backup process, to ensure consistency and should be
//executed in the upgrade process and, perhaps in the health center.
function fix_orphaned_questions ($course) {
global $CFG;
$categories = get_records_sql("SELECT DISTINCT t.category, t.category
FROM {$CFG->prefix}quiz_questions t,
{$CFG->prefix}quiz_question_grades g,
{$CFG->prefix}quiz q
WHERE q.course = '$course' AND
g.quiz = q.id AND
g.question = t.id",false);
if ($categories) {
foreach ($categories as $key => $category) {
$exist = get_record('quiz_categories','id', $key);
//If the category doesn't exist
if (!$exist) {
//Build a new category
$db_cat->course = $course;
$db_cat->name = get_string('recreatedcategory','',$key);
$db_cat->info = get_string('recreatedcategory','',$key);
$db_cat->publish = 1;
$db_cat->stamp = make_unique_id_code();
//Insert the new category
$catid = insert_record('quiz_categories',$db_cat);
unset ($db_cat);
if ($catid) {
//Reasign orphaned questions to their new category
set_field ('quiz_questions','category',$catid,'category',$key);
}
}
}
}
}
//Delete category ids from backup_ids table
function delete_category_ids ($backup_unique_code) {