public static function i($id)
{
if (self::$i == NULL) {
self::$i = new Lesson($id);
}
return self::$i;
}
public function doUpdate()
{
if ($lessons = Data::get("lessons")) {
$lessons = json_decode($lessons);
}
if (!is_array($lessons)) {
return false;
}
$n = 1;
foreach ($lessons as $lessonid) {
if ($lessonid) {
$lesson = Lesson::i($lessonid);
$lesson->subject_seq = $n;
$lesson->update();
}
$n++;
}
}
