CakePHP自定义验证规则仅在创建时检查唯一字段组合

Question

我有一个用户模型的数据库.这些用户的名字和生日应该是唯一的.所以我写了一个名为checkUnique的自定义验证函数

public function checkUnique($check){
        $condition = array(
            "User.name" => $this->data["User"]["name"],
            "User.lastname" => $this->data["User"]["lastname"],
            "User.birthday" => $this->data["User"]["birthday"]
        );

        $result = $this->find("count", array("conditions" => $condition));

        return ($result == 0);
}

模型中的验证规则:

"name" => array(
       "checkUnique" => array(
            "rule" => array("checkUnique"),
            "message" => "This User already exists.",
            "on" => "create"
       ),
)

我有两个问题.第一种:此验证规则也会在更新操作时触发,实现为

public function edit($id = null) {
        if (!$this->User->exists($id)) {
            throw new NotFoundException(__('Invalid User'));
        }
        if ($this->request->is(array('post', 'put'))) {
            if ($this->User->save($this->request->data)) {
                $this->Session->setFlash(__('Update done.'));
                return $this->redirect(array('action' => 'index'));
            } else {
                $this->Session->setFlash(__('The user can't be saved.'));
            }
        } else {
            $options = array('conditions' => array('User.' . $this->User->primaryKey => $id));
            $this->request->data = $this->User->find('first', $options);
        }
    }

但我写了"on" => "create",为什么它也会在更新时触发？第二个问题:如果验证规则只触发上创建的,我怎么能管理,触发验证错误,如果有人改名换姓,姓和生日与数据库中的另一用户？然后应该触发唯一的验证规则.

Answer 1

删除'on'=>'create'.(您希望在两个事件中都进行验证).

将自定义验证规则修改为此

public function checkUnique() {
    $condition = array(
        "User.name" => $this->data["User"]["name"],
        "User.lastname" => $this->data["User"]["lastname"],
        "User.birthday" => $this->data["User"]["birthday"]
    );
    if (isset($this->data["User"]["id"])) {
        $condition["User.id <>"] = $this->data["User"]["id"];
        //your query will be against id different than this one when 
        //updating 
    }
    $result = $this->find("count", array("conditions" => $condition));
    return ($result == 0);
}