The information I have is the course id and the module id, what I'm basically missing now is the mapping of the (studentquiz) entries to the course_modules instance.
I would greatly appreciate any input!
The previous developers of the plugin I'm now working on, have saved the coursemodule id into our plugin database (I assume for easier access). This seems to work all fine, however when you restore a course backup, the coursemodule id needs updating, yet I have no idea how to figure out a mapping between old cmid and new cmid.
I figured out a way to do it. I feel if Moodle was built a bit better structured, this all wouldn't be such an issue. After everything has been restored, we go in and find the the matching instance in course_modules and add the course_modules id to our table.
protected function after_execute() {
global $DB;
$courseid = $this->get_courseid();
$moduleid = $DB->get_field('modules', 'id', array('name'=>'studentquiz'));
$cms = $DB->get_records('course_modules', array('course'=>$courseid, 'module'=>$moduleid));
foreach ($cms as $cm) {
$studentquiz = $DB->get_record('studentquiz', array('id'=>$cm->instance));
$studentquiz->coursemodule = $cm->id;
$DB->update_record('studentquiz', $studentquiz);
}
}