CakePHP 关联的多个表添加读取数据

两个表，一个是users,三个字段id,user_name,user_password,另一个是user_infos,三个字段,id,email,user_id.其中,user_id与表users中的id关联。 我的目标是在往表users插入数据后，取到新记录的id,作为user_infos的user_id字段内容，插入一行到user_infos表. 项目名为cakephp,访问路径为http://localhost/cakephp/,添加用户的URL为http://localhost/cakephp/users/add，查看用户的URL为http://localhost/cakephp/users/ models/user.php:

<?php
class User extends AppModel {
    var $name = 'User';
    var $uses = array (
            'User',
            'UserInfo' 
    );
    //需要用到的模型
    var $hasOne = array (
            "UserInfo" => array (
                    'className' => 'UserInfo',
                    'conditions' => '',
                    'order' => '',
                    'dependent' => true,
                    'foreignKey' => 'user_id' 
            ) 
    );
    //与表user_infos关联
    var $validate = array (
            'user_name' => array (
                    'rule' => 'notEmpty',
                    'isUnique'=>true
            )
    );
    //验证user_name不为空,且唯一
}
?>

models/user_info.php:

<?php
class UserInfo extends AppModel {
    var $name = 'UserInfo';
    var $validate = array (
            'email' => array (
                    'rule' => array (
                            'email',
                            true 
                    ) 
            ) 
    );
    //<?php
class UserInfo extends AppModel {
    var $name = 'UserInfo';
    var $validate = array (
            'email' => array (
                    'rule' => array (
                            'email',
                            true 
                    ) 
            ) 
    );
    //验证Email格式，好像会联网查域名是否已注册
}
?>
}
?>

controllers/users_controller.php:

<?php
class UsersController extends AppController {
    var $helpers = array (
            'Html',
            'Form' 
    );
    function index() {
        // 读取，访问http://localhost/cakephp/users/时执行
        $allUsers = $this->User->find ( 'all', array (
                'fields' => array (
                        'User.id',
                        'User.user_name',
                        'User.user_password',
                        'UserInfo.email' 
                ),
                'order' => 'id DESC' 
        ) );
        //
        $this->set ( 'allUsers', $allUsers );
    }
    
    function add() {
        // 添加，访问http://localhost/cakephp/users/add时执行
        if (! empty ( $this->data )) {
            // 如果post数据不为空
            if ($this->User->saveAll ( $this->data, array (
                    'validate' => 'first' 
            ) )) {
                // saveAll方法会同时在两个表添加数据，validate=>first 验证所有模型
                
                $this->flash ( '注册成功', '/users/' );
            } else {
                $this->flash ( '注册失败', '/users/add' );
            }
        
        }
    }
}
?>

下面是View,我把模板扩展名改成了php，这样可以高亮显示 views/add.php：

<p>注册帐号.</p>
<?php echo $form->create('User', array('action' => 'add')) ;?>

<?php
    echo $form->input('User.user_name');
    echo $form->input('User.user_password');
    echo $form->input('UserInfo.email');
?>
<?php echo $form->end('注册');?>

views/index.php:

<table>
<?php 
echo $html->tableHeaders(array_keys(array_merge($allUsers[0]['User'],$allUsers[0]['UserInfo'])));
//生成表头，参数是一个数组，array_merge方法是把两个数组合并
foreach ($allUsers as $thisuser)
{
    echo $html->tableCells(array_merge($thisuser['User'],$thisuser['UserInfo']));
    //生成行，参数是数组
}
?>
</table>