After the create method in thinkphp automatically creates form data, will the fields in the form be saved as attributes of the model object?

Code in controller:

<code>if(IS_POST){
            if($model->validate($model->_login_validate)->create()){
                
                if($model->login()){
                    if($res = session('returnUrl')){
                        session('returnUrl',null);
                        $returnUrl = $res;
                    }else{
                        $returnUrl = U('/');
                    }
                    
                    $this->success('登陆成功！',$returnUrl);
                    die;
                }
            }
            $this->error($model->getError());
        }
</code>

Code in model:

<code>public function login(){
        var_dump($this);die;    //这里打印$this并没有找到username和password这两个属性，可是为什么下面的$username可以取到值呢？？
        $username = $this->username;
        $password = $this->password;
        $model = M('Member');

        $where['username'] = $username;
        $user = $model->where($where)->find();
        。。。
}
</code>

Reply content:

Code in controller:

<code>if(IS_POST){
            if($model->validate($model->_login_validate)->create()){
                
                if($model->login()){
                    if($res = session('returnUrl')){
                        session('returnUrl',null);
                        $returnUrl = $res;
                    }else{
                        $returnUrl = U('/');
                    }
                    
                    $this->success('登陆成功！',$returnUrl);
                    die;
                }
            }
            $this->error($model->getError());
        }
</code>

Code in model:

<code>public function login(){
        var_dump($this);die;    //这里打印$this并没有找到username和password这两个属性，可是为什么下面的$username可以取到值呢？？
        $username = $this->username;
        $password = $this->password;
        $model = M('Member');

        $where['username'] = $username;
        $user = $model->where($where)->find();
        。。。
}
</code>

It exists in the data. Use get to read the non-existing attributes and then go to the data. Similarly, you can set the attributes by set, that is, add the attributes directly after the object

<code> public function __get($name) {
        return isset($this->data[$name])?$this->data[$name]:null;
    }
    
    public function __set($name,$value) {
        // 设置数据对象属性
        $this->data[$name]  =   $value;
    }</code>

Yes, although I have never written it like this. But I printed the object after create and found that it has these attributes

<code>$data['name'] = 'ThinkPHP';
$data['email'] = 'ThinkPHP@gmail.com';
$User->create($data);
// 创建完成数据对象后可以直接读取数据
echo $User->name;
echo $User->email;
// 也可以直接修改创建完成的数据
$User->name = 'onethink'; // 修改name字段数据
$User->status = 1; // 增加新的字段数据</code>

http://www.kancloud.cn/manual...
I found this paragraph from the 3.2.3 document. After you create(), the $this->name; you accessed should be the attribute after creation. Try var_dump($model);. .