我编写了一个编辑功能来更新用户的信息，我的代码：
if($this->request->is('post')){
$this->request->data['User']['password']=Security::hash($this->request->data['User']['password'],'sha1', Configure::read('Security.salt'));
$this->request->data['User']['type'] = '2';
$this->request->data['User']['username'] = $username;
//debug($this->request->data);
if($this->User->validates()){
$this->User->set($this->request->data['User']);
if ($this->User->save($this->request->data,false)) {
$this->Session->setFlash(__('The user has been saved'));
$this->redirect($this->root.'index');
} else {
$this->Session->setFlash(__('The user could not be saved. Please, try again.'));
}
}
}
但是我检查了这个功能：$ this-＆gt; User-＆gt; exists（）永远不会返回true，在我的情况下，User表键是用户名，当我编辑用户名时，这个功能可以将新信息保存为新记录，但是当我没有编辑用户名时，无法保存新信息，为什么它会像这样工作？如何更正我的功能来编辑记录？
答案 0 :(得分：0)
相信我，你几乎总是想要在你的表中拥有id。添加它并将其作为主键。
现在它看起来像这样：
if($this->request->is('post')){
// Think about using AuthComponent:
// $this->request->data['User']['password'] = AuthComponent::password($this->request->data['User']['password']);
$this->request->data['User']['password'] = Security::hash($this->request->data['User']['password'],'sha1', Configure::read('Security.salt'));
$this->request->data['User']['type'] = '2';
$this->request->data['User']['username'] = $username;
$this->User->id = $id;
// Checking if the user exists.
if(!$this->User->exists()){
// If not, tell it here.
}
if($this->User->validates()){
if ($this->User->save($this->request->data, false)) {
$this->Session->setFlash(__('The user has been saved'));
$this->redirect($this->root.'index');
} else {
$this->Session->setFlash(__('The user could not be saved. Please, try again.'));
}
}else{
// Something went wrong.
}
}
如果您拥有主键的用户名，则每次不同时，CakePHP都会创建新记录。
现在，我将通过AJAX调用给你我的函数read，也许它会帮助你。
// Function for creating and updating users.
public function update(){
// If the request is AJAX (from Ext-JS).
if($this->request->is('ajax')){
// Prepare data for CakePHP. $this->request->data['ModelName'] => array of data.
$this->request->data['User'] = $this->request->data;
// If there is "id" in data, then it's "edit".
// If there is no "id" in data, then it's "add".
if($this->request->data['id'] != null){
// Setting "id" for user so the CakePHP could use "save", "saveAll", "exits" or
// any other function for a particular user.
$this->User->id = $this->request->data['id'];
// Checking if the user exists.
if (!$this->User->exists()) {
// If there is no user with a given "id", remove the data (security reasons).
// Put the "success" and "message" (message) properties.
$this->request->data = array();
$this->request->data['success'] = false;
$this->request->data['message'] = "No user with this id.";
// Return the message to Ext-JS.
return new CakeResponse(array('body' => json_encode($this->request->data)));
}
// List of fields to save.
$fieldList = array('id', 'first_name', 'last_name', 'username', 'role_id', 'language_id', 'status', 'last_login', 'created', 'modified');
// Only if there is an password provided by user, save it.
if($this->request->data['User']['password'] != ''){
array_push($fieldList, 'password');
}
// If you are here, then there is a user with a given "id" and you are editing that user.
if ($this->User->save($this->request->data, true, $fieldList)) {
// Remove any data except the "success" and "message" (message) properties (security reasons).
$this->request->data = array();
$this->request->data['success'] = true;
$this->request->data['message'] = "The user has been changed.";
}else {
// If you are here, something went wrong with editing a user. Remove the data (security reasons).
// Put the "success" and "message" (message) properties.
$this->request->data = array();
$this->request->data['success'] = false;
$this->request->data['message'] = "Error with editing.";
}
}else{
// If you are here, then you are adding a new user (because there is no "id" in data). Create a new row in table.
$this->User->create();
// Try to save the user with data from $this->request->data['User'].
if ($this->User->save($this->request->data)) {
// If you are here, then everything is ok. Remove any data and tell that to Ext-JS with "success" and "message" (message) properties.
$this->request->data = array();
$this->request->data['success'] = true;
$this->request->data['message'] = "The user has been added.";
}else{
// If you are here, something probably went wrong with $this->request->data['User'].
// Remove any data (security reasons) and tell that to Ext-JS with "success" and "message" (message) properties.
$this->request->data = array();
$this->request->data['success'] = false;
$this->request->data['message'] = "Something went wrong with adding a user.";
}
}
// Return any data to Ext-JS, despite the success.
// $this->request->data['success'] => (true | false).
// $this->request->data['message'] => (message for Ext-JS).
return new CakeResponse(array('body' => json_encode($this->request->data)));
}
}
现在，您将return new CakeResponse消息发送给用户，而不是Session。
答案 1 :(得分：0)
if($this->User->validates()){
在此之前的任何时候，问题中的代码都没有完成以下任何一项：
create set 因此，这里发生的是代码尝试验证空模型对象。假设返回false（如问题所暗示的那样）保存＆＃34;不工作的原因＆＃34;是代码是而不是调用save。
但我检查此功能：$ this-＆gt; User-＆gt; exists（）永远不会返回true
预计，因为没有致电create，set或设置User->id财产。
明确调用validates没关系，但也没必要。 Save已经调用验证 - 因此，如果您的代码工作正常，您需要两次运行验证规则。
使用the book中的此示例作为参考：
public function edit($id) {
if ($this->request->is('post')) {
if ($this->Recipe->save($this->request->data)) {
$this->Session->setFlash('Recipe Saved!');
$this->redirect('/recipes');
}
}
$this->set('recipe', $this->Recipe->findById($id));
}
答案 2 :(得分：0)
尝试以下步骤
if（$ this-＆gt; User-＆gt; save（$ this-＆gt; request-＆gt; data，false））{
$this->Session->setFlash(__('Recipe Saved!'));
return $this->redirect(array('action' => 'view_users'));
}