【九月打卡】第7天--大话PHP设计模式第八章节数据对象映射模式

课程名称：大话PHP设计模式

课程章节： 8-1数据对象映射模式之简单案例实现、8-2数据对象映射模式之复杂案例实现
课程链接

主讲老师：Rango

课程内容

叙述了数据对象模式的定义，首先通过简单的案例代码，来让我们对这种模式有个初步的理解。然后通过复杂案例的描述，加深我们对这种模式的理解，让我们能够使用到日常代码中。

课程收获

数据对象映射模式

1、数据对象映射模式，是将对象和数据存储映射起来，对一个对象的操作会映射为对数据存储的操作

2、在代码中实现数据对象映射模式，我们将实现一个ORM类，将复杂的SQL语句，映射成对象属性的操作

3、结合使用数据对象映射模式、工厂模式、注册模式

简单案例实现

class User
{
    public $id;
    public $name;
    public $mobile;
    public $regtime;

    protected $db;

    function __construct()
    {
        $this->db = new Database\MySQLi;
        $res = $this->db->connect('127.0.0.1','root','root','test');
        $data = $res->fetch_assoc();

        $this->id = $data['id'];
        $this->name = $data['name'];
        $this->mobile = $data['mobile'];
        $this->regtime = $data['regtime'];
    }

    function __destruct()
    {
        $this->db->query("updata user set name = '{$this->name}',mobile = '{$this->mobile}',regtime = '{$this->regtime}' where id = '{$this->id}'");
    }
}


$user = new User;

$user->name = 'LDR_1109';
$user->mobile = '13298654268';
$user->regtime = date('Y-m-d H:i:s');

复杂案例实现

class User
{
    public $id;
    public $name;
    public $mobile;
    public $regtime;

    protected $db;

    function __construct()
    {
        $this->db = new Database\MySQLi;
        $res = $this->db->connect('127.0.0.1','root','root','test');
        $data = $res->fetch_assoc();

        $this->id = $data['id'];
        $this->name = $data['name'];
        $this->mobile = $data['mobile'];
        $this->regtime = $data['regtime'];
    }

    function __destruct()
    {
        $this->db->query("updata user set name = '{$this->name}',mobile = '{$this->mobile}',regtime = '{$this->regtime}' where id = '{$this->id}'");
    }
}

class Factory
{
    static function createDatabase()
    {
        $db = Database::getInstance();
        Register::set('test',$db);
        return $db;
    }

    static function getUser($id)
    {
        $key = 'user_'.$id;
        $user = Register::get($key);
        if(!$user) {
            $user = new User($id);
            Register::set($key,$user);
        }

        return $user;
    }

}


class Page
{
    function index()
    {
        $user = Factory::getUser(1);
        $user->name = 'Rango';
        $user->test();
        echo "OK";
    }

    function test()
    {
        $user = Factory::getUser(1);
        $user->mobile = '18845424156';

    }
    
}


$user = new Page;

$user->index();

课程截图