/**
* Given an ID of an instance of this module,
* this function will permanently delete the instance
* and any data that depends on it.
*
* @param int $id the id of the quiz to delete.
* @return bool success or failure.
*/
function quiz_delete_instance($id) {
global $DB;
$quiz = $DB->get_record('quiz', array('id' => $id), '*', MUST_EXIST);
quiz_delete_all_attempts($quiz);
quiz_delete_all_overrides($quiz);
$DB->delete_records('quiz_question_instances', array('quiz' => $quiz->id));
$DB->delete_records('quiz_feedback', array('quizid' => $quiz->id));
$events = $DB->get_records('event', array('modulename' => 'quiz', 'instance' => $quiz->id));
foreach ($events as $event) {
$event = calendar_event::load($event);
$event->delete();
}
quiz_grade_item_delete($quiz);
$DB->delete_records('quiz', array('id' => $quiz->id));
return true;
}
/**
* Given an ID of an instance of this module,
* this function will permanently delete the instance
* and any data that depends on it.
*
* @param int $id the id of the quiz to delete.
* @return bool success or failure.
*/
function quiz_delete_instance($id)
{
global $DB;
$quiz = $DB->get_record('quiz', array('id' => $id), '*', MUST_EXIST);
quiz_delete_all_attempts($quiz);
quiz_delete_all_overrides($quiz);
// Look for random questions that may no longer be used when this quiz is gone.
$sql = "SELECT q.id\n FROM {quiz_slots} slot\n JOIN {question} q ON q.id = slot.questionid\n WHERE slot.quizid = ? AND q.qtype = ?";
$questionids = $DB->get_fieldset_sql($sql, array($quiz->id, 'random'));
// We need to do this before we try and delete randoms, otherwise they would still be 'in use'.
$DB->delete_records('quiz_slots', array('quizid' => $quiz->id));
$DB->delete_records('quiz_sections', array('quizid' => $quiz->id));
foreach ($questionids as $questionid) {
question_delete_question($questionid);
}
$DB->delete_records('quiz_feedback', array('quizid' => $quiz->id));
quiz_access_manager::delete_settings($quiz);
$events = $DB->get_records('event', array('modulename' => 'quiz', 'instance' => $quiz->id));
foreach ($events as $event) {
$event = calendar_event::load($event);
$event->delete();
}
quiz_grade_item_delete($quiz);
$DB->delete_records('quiz', array('id' => $quiz->id));
return true;
}