Cakephp rest put方法在数据库中没有更新

Question

我正在尝试使用CakePHP 3.2编写RESTful服务，请遵循本指南http://book.cakephp.org/3.0/en/development/rest.html

除了edit（）之外，每个函数都可以正常工作，当我在Postman中使用PUT方法进行测试时，它已经返回＆＃34; Saved＆＃34;但是在Mysql数据库中没有任何改变

我不确定它是关于Code，MySql还是Server Configuration？

 public function edit($id){
    $appointmentType = $this->AppointmentType->get($id);
    if ($this->request->is(['post', 'put'])) {
        $appointmentType = $this->AppointmentType->patchEntity($appointmentType, $this->request->data);
        if ($this->AppointmentType->save($appointmentType)) {
            $message = 'Saved';
        } else {
            $message = 'Error';
        }
    }
    $this->set([
        'message' => $message,
        '_serialize' => ['message']
    ]);
}