public function deleteClass($classId) { try { $tId = session('instId'); $class = new \Home\Model\ClassModel(); $class->startTrans(); $result = $class->deleteClass($classId, $tId); $class->deleteClassDetails($classId, $tId); $class->deleteClassDetailAndStudentRelas($classId, $tId); $class->commit(); $data = "true"; } catch (Exception $e) { $class->rollback(); $data = "false"; } $this->ajaxReturn($data); }