php - 我是否正确理解了如何使用 Zend Framework 构建强大的 php 后端？

Question

你们中的大多数人都应该知道关于“Writing Robust PHP Backends with Zend Framework”的“著名”文章有趣的阅​​读之后，我决定试一试，因为我无法找到处理我的数据的黄金解决方案。

然后，我试着写了一个骨架，有一个具体的例子。

但有些观点对我来说看起来很奇怪。但我稍后会详细介绍。

为了更清楚，我删除了一些代码。这是代码:

    // Kind of stdClass. the User Domain Object
    // Nothing more to say, it's just about to have a User object
    // I guess we could do here some business logic like the username should
    // be only alpha, etc..

    class User
    {
        $_data = array('userId', 'userName');
        public function __construct($data = null)
        {
            $this->populate($data);
        }
        
        public function populate($data = null)
        {
            if ( is_object ($data) )
            {
                $data = (array) $data;
            }
        
            if ( ! is_array($data) )
            {
                throw new Exception ('Data must be an array or an object');
            }
            
            foreach ($data as $property => $value)
            {
                $this->$property = $value;
            }
        }
        
        public function toArray()
        {
            return $this->_data;
        }
    }
    
   // The UserTable extends Zend_Db_Adapter_Abstract or Zend_Db_Table
   // Here we do things like fetch, add, update, etc...
   // Validating the data depending on the persistent layers which is the db :
   // respect the data types and formats.

   class UserTable extends Zend_Db_Adapter_Abstract
    {
        public function __construct ($options)
        {
            parent::__construct($options);
        }
        
        public function validateUser($user)
        {
            if ( null == $user->name || len($user->name) >= 30 || len($user->name) <= 0 )
            {
                throw new Zend_Db_Exception ('Username must be between  0 and 30 chars and must not be null');
            } 
            
            $user->name = $this->quote($user->name);
            
            return $user;        
        }
        
        public function createUser(User $user)
        {
            $user = $this->validateUser($user);
            
            $user = $user->toArray();
            
            try
            {
                $this->insert('Users', $user);
                $user->id $this->lastInsertId('Users');
                
            } catch (Zend_Db_Expection $e) {
                echo 'Error while creating user :', $e->getMessage();
            }
            
            return $user;
        }
        
        public function updateUser(User $user)
        {
            $user = $this->validateUser($user);
            
            $user = $user->toArray();
        
            if (null == $user->id)
            {
                throw new Exception ('User must have an userId to be updated');
            }
            
            try
            {
                $this->update('Users', $user, 'userId = ' . $user->id);
                
            } catch (Zend_Db_Expection $e) {
                echo 'Error while updating user :', $e->getMessage();
            }
            
            return $user;
        }
    }

    // the UserService will be used like an API from the Controller
    // Let says that our adapters must implements an interface for our Service
    // be able to work.
    // It overrides the method provided by the adapter without knowledge of
    // the data is stored. You can then provide another adapter 
    // than DB (like webservice, xml, etc...)
    // But then, if the adapter implements an interface, why should I use 
    // a Service Layer ? Maybe i didn't understand the Service Layer Concept.

    class UserService
    {
        $_adapter = null;
        
        public function __construct($adapter = null)
        {
            $this->setAdapter($adapter);
        }
        
        public function setAdapter($adapter = null)
        {
            $this->_adapter = $adaper;
        }
        
        public function getUserById($id = 0)
        {
            $this->getAdapter()->getUserById($id);
        }
        
        public function save(User $user)
        {
            if (null != $user->id)
            {
                $this->getAdapter()->createUser($user);
            } else {
                $this->getAdapter()->updateUser($user);
            }
        }
        
        // proxy method to the PostService
        // let's say that we have getPostsByUser($userId) method within the 
        // PostService class
        // Btw, Maybe we should find a better way to initialize the adapter,
        // to let it less dependent.
        
        public function getPosts(User $user)
        {
            $postService = new PostService(new PostTable());
            return $postService->getPostsByUser($user->id);
        }
    }
    
    

    // The use in a controller is pretty easy, and the controller, just do 
    // what it should in an MVC architecture.
    // get the data from the model, pass it to the view.

    class UserController
    {
        protected $user = null;
        
        public function init()
        {
            // get the user object from the session
        }
        public function postsAction()
        {
            $userService = new UserService(new UserTable());
            
            $this->view->posts = $userService->getPostsByUser($user->id);
            
        }
    }

所以最后一个问题是，我理解这个概念了吗？还是我在执行它时犯了一些错误？

附言: 标签自动完成功能不再起作用，所以我无法提供正确的标签。

Answer 1

我认为你应该看看 Zend_Db_Table .它会节省您创建 UserTable 类的时间。

你的 Controller 也没有扩展 Zend_Controller_Action 怎么来的。

您可能希望使用 Zend_From 或 Zend_Validate 来验证您的模型的最后一件事。

我觉得你的实现还不错，但这篇文章对我来说似乎很老。