public function execute() { $request = $this->getRequest(); $action = $request->get(0); switch ($action) { case 'get': $subjectLoader = new Subject(); $subjects = $subjectLoader->getAllSubjects(true); $sub_subjects = $subjectLoader->getSubSubjects(false, true); return $this->send(array('subjects' => $subjects, 'sub_subjects' => $sub_subjects)); break; default: throw new Exception('未知的动作', Exception::CODE_ACTION_NOTFOUND); } }