因此，验证错误会出现在我的添加操作中，但不会出现在我的编辑操作中。以下是我的控制器的片段：
在这里，我按预期收到验证错误消息：
public function add() {
if ($this->request->is('post')) {
if ($this->User->save($this->request->data)) {
$this->Session->setFlash(__('The user has been saved.'));
$this->redirect(array('action' => 'index'));
} else {
$this->Session->setFlash(__('The user could not be saved. Please try again.'));
}
}
$this->set('clients', $this->User->Client->find('list'));
}
但不是在这里：
public function edit($id = null) {
$this->User->id = $id;
if (!$this->User->exists()) {
throw new NotFoundException(__('Invalid user'));
}
if ($this->request->is('post') || $this->request->is('put')) {
if ($this->User->save($this->request->data)) {
$this->Session->setFlash(__('The user has been saved.'));
$this->redirect(array('action' => 'index'));
} else {
$this->Session->setFlash(__('The user could not be saved. Please, try again.'));
}
} else {
$this->request->data = $this->User->read(null, $id);
unset($this->request->data['User']['password']);
}
$this->set('user', $this->User->read());
$this->set('clients', $this->User->Client->find('list'));
}