public function updateCourseMarks($cant_marks, $con = null)
{
CourseSubjectStudentMarkPeer::deleteByCourseSubjectStudent($this->getId(), $con);
for ($i = 1; $i <= $cant_marks; $i++) {
$course_subject_student_mark = new CourseSubjectStudentMark();
$course_subject_student_mark->setCourseSubjectStudent($this);
$course_subject_student_mark->setMarkNumber($i);
$course_subject_student_mark->save($con);
}
}
