Cakephp:保存前检查数据是否存在 - Cakephp: check if data exist before saving

Cakephp: check if data exist before saving

我目前正在开发我的cakepp应用程序，我有一个名为time的数据库，它有两个表：users and accounts。

users表具有EmployeeId和Password数据字段accounts表中还有EmployeeId、Password等

现在，我想做的是，每次我将数据添加到用户表时，它都会检查要保存的数据是否已经存在于帐户表中，如果不存在，它将闪烁错误，否则它将保存。

我怎么能在蛋糕里做到这一点？这是代码：

添加.ctp

public function add()
    {
        $user = $this->Users->newEntity();
        if ($this->request->is('post')) {
            $user = $this->Users->patchEntity($user, $this->request->data);
            if ($this->Users->save($user)) {
                $this->Flash->success(__('Logs has been saved.'));
                return $this->redirect(['action' => 'index']);
            } else {
                $this->Flash->error(__('The logs could not be saved. Please, try again.'));
            }
        }
        $this->set(compact('user'));
        $this->set('_serialize', ['user']);
    }

您可以通过这种方式解决

在添加方法中，您可以使用请求数据检查Employid。

例如

if ($this->request->is('post')) {
            $employid = $this->request->data('employid');   //make sure your field name 
            $this->loadModel('Your Employ model');  // add your employ model 
            $check = $this->Employ->find('count')
                                  ->where(['Employ.employid' =>$employid ]);
            if($check!=0){
            $user = $this->Users->patchEntity($user, $this->request->data);
            if ($this->Users->save($user)) {
                $this->Flash->success(__('Logs has been saved.'));
                return $this->redirect(['action' => 'index']);
               } else {
                  $this->Flash->error(__('The logs could not be saved. Please, try again.'));
                }
            } 
           else 
           {
               echo "error message if not found";
           }
}

我想你明白道理了。