要在數(shù)據(jù)庫中更新記錄，首先，我們需要使用TableRegistry類獲得一個表（table）?？梢杂肨ableRegistry類的get（）方法獲取表的實例。get（）方法將表名作為參數(shù)?，F(xiàn)在，我們使用這個實例來得到想要更新的記錄。

調(diào)用這個實例的get（）方法并傳遞主鍵，查找到會被保存到另一個實例中的記錄。使用這個實例來設置你想要更新的新值，然后調(diào)用TableRegistry類的實例（這個實例）的save（）方法來更新記錄。

例

修改config/routes.php文件如下。

config/routes.php文件

<?php
   use CakeCorePlugin;
   use CakeRoutingRouteBuilder;
   use CakeRoutingRouter;
   
   Router::defaultRouteClass('DashedRoute');
   Router::scope('/', function (RouteBuilder $routes) {
      $routes->connect('/users/edit', ['controller' => 'Users', 'action' => 'edit']);
      $routes->fallbacks('DashedRoute');
   });
   Plugin::routes();

在src/Controller/目錄下創(chuàng)建一個UsersController.php文件。復制以下代碼至其中。

src/Controller/UsersController.php

<?php
   namespace AppController;
   use AppControllerAppController;
   use CakeORMTableRegistry;
   use CakeDatasourceConnectionManager;

   class UsersController extends AppController{
      public function index(){
         $users = TableRegistry::get('users');
         $query = $users->find();
         $this->set('results',$query);
      }
      public function edit($id){
         if($this->request->is('post')){
            $username = $this->request->data('username');
            $password = $this->request->data('password');
            $users_table = TableRegistry::get('users');
            $users = $users_table->get($id);
            $users->username = $username;
            $users->password = $password;
         
            if($users_table->save($users))
            echo "User is udpated";
            $this->setAction('index');
         } else {
            $users_table = TableRegistry::get('users')->find();
            $users = $users_table->where(['id'=>$id])->first();
            $this->set('username',$users->username);
            $this->set('password',$users->password);
            $this->set('id',$id);
         }
      }
   }
?>

在src/Template目錄下創(chuàng)建一個Users目錄 ，如果已創(chuàng)建則忽略，并在該Users目錄下創(chuàng)建一個名為index.ctp的視圖文件。復制以下代碼至其中。

src/Template/Users/index.ctp

<a href = "add">Add User</a>
<table>
   <tr>
      <td>ID</td>
      <td>Username</td>
      <td>Password</td>
      <td>Edit</td>
      <td>Delete</td>
   </tr>
   
   <?php
      foreach ($results as $row):
         echo "<tr><td>".$row->id."</td>";
         echo "<td>".$row->username."</td>";
         echo "<td>".$row->password."</td>";
         echo "<td><a href = '".$this->Url->build
            (["controller" => "Users","action" => "edit",$row->id]).
            "'>Edit</a></td>";
         echo "<td><a href = '".$this->Url->build
            (["controller" => "Users","action" => "delete",$row->id]).
            "'>Delete</a></td></tr>";
      endforeach;
   ?>
</table>

在Users目錄中創(chuàng)建另一個視圖文件edit.ctp，復制以下代碼至其中。

src/Template/Users/edit.ctp

<?php
   echo $this->Form->create("Users",array('url'=>'/users/edit/'.$id));
   echo $this->Form->input('username',['value'=>$username]);
   echo $this->Form->input('password',['value'=>$password]);
   echo $this->Form->button('Submit');
   echo $this->Form->end();
?>

通過訪問以下網(wǎng)址，然后點擊Edit鏈接來編輯記錄。

http://localhost:85/CakePHP/users

輸出

訪問上述網(wǎng)址，并單擊Edit鏈接后，您會看到以下頁面，可也在這里編輯記錄。