OOP PHP Codeigniter 控制器层次结构

发布于 2024-11-05 23:55:35 字数 700 浏览 1 评论 0原文

我的 OOP 概念有点问题。我会尽力解释。

我有这个类

class Application_controller extends CI_Controller{
     public function addItem(){
        "some code to add the item to the database (working)";
     }
}

，我还有另一个类，两个控制器：

require_once 'application_controller.php';
class Contact extends Application_controller{
     public function __construct(){
         parent::__construct("variables needed");
     }
}

在联系人的视图添加中，我添加了以下操作contact/addItem。

好的，现在这就是我对 OOP 的总体了解。

方法 addItem 是否不应该是 Contact 类的一部分，因为它扩展了 Application_controller？

我之所以这么问，是因为当我提交表单时，我没有得到任何操作，而当我在 Contact 类中添加方法 addItem 并覆盖父类时，它就会起作用。

原文

I'm having a litle problems with my concepts of OOP. I'll try to explain the best I can.

I have this class

class Application_controller extends CI_Controller{
     public function addItem(){
        "some code to add the item to the database (working)";
     }
}

And I have another class, both controllers:

require_once 'application_controller.php';
class Contact extends Application_controller{
     public function __construct(){
         parent::__construct("variables needed");
     }
}

And in the View add of the contact I added the following action contact/addItem.

Ok, now here's what I know about OOP in general.

Isn't the method addItem supposed to be part of the Contact class because its extends Application_controller?

I'm asking because when I submit the form I get no action, and when I add the method addItem in the class Contact overriding the parent one it works.

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随遇而安 2024-11-12 23:55:35

您没有采取任何行动的原因是 codeigniter 在您的 Contact 类中找不到方法 addItem （更新：这可能是由于 CodeIgniter 路由的工作方式所致）。解决方案是使 addItem 成为模型中的通用方法，将数据存储在表中，将其移动到模型，然后将模型加载到控制器中。

创建 application/models/writeModel.php

class writeModel extends CI_Model{
  function addItem(){
    // code here
  }
}

在控制器中

    class Contact extends Controller{
       function __controller(){
          parent::Controller();
          $this->load->model('writeModel');
       }

       function somefunction(){
          $this->writeModel->addItem(); // call the method here
       }
    }

：参考：CodeIgniter 模型

The reason you get no action is that codeigniter doesn't find a method addItem in your Contact class (update: this is probably due to the way CodeIgniter routing works). The solution would be to make addItem a generic method in a Model that stores data in a table, move it to a Model, and load the model in your controller.

Create application/models/writeModel.php

class writeModel extends CI_Model{
  function addItem(){
    // code here
  }
}

In your controller:

    class Contact extends Controller{
       function __controller(){
          parent::Controller();
          $this->load->model('writeModel');
       }

       function somefunction(){
          $this->writeModel->addItem(); // call the method here
       }
    }

Reference: CodeIgniter Models

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物价感观 2024-11-12 23:55:35

这里的问题（除了OP中的几个语法错误之外）很可能是“Contact”无法扩展“Application_controller”，因为它不知道它存在。如果我们设置这样的测试：

/controllers/Test.php

class Test extends CI_Controller
{
    function __construct()
    {
        parent::__construct();
    }

    function index()
    {
        echo 'test';
    }
}

/controllers/TestTwo.php

require_once("Test.php");

class TestTwo extends Test    
{
    function __construct()
    {
        parent::__construct();
    }
    function index()
    {
        parent::index();
        echo ' and test two';
    }
}

我们将通过导航到“测试和测试二”获得所需的输出appurl/TestTwo/.这是因为 TestTwo 知道 Test。删除 require(); TestTwo.php 中的行将破坏关系。

从 TestTwo 中删除 index() 函数将导致导航到 appurl/TestTwo/ 时仅输出“test”。

The problem here (other then the several syntax errors in the OP) is likely to be that "Contact" can not extend "Application_controller" because it does not know it exists. If we setup a test like this:

/controllers/Test.php

class Test extends CI_Controller
{
    function __construct()
    {
        parent::__construct();
    }

    function index()
    {
        echo 'test';
    }
}

/controllers/TestTwo.php

require_once("Test.php");

class TestTwo extends Test    
{
    function __construct()
    {
        parent::__construct();
    }
    function index()
    {
        parent::index();
        echo ' and test two';
    }
}

We will get the desired output of "test and test two" by navigating to appurl/TestTwo/. This is because TestTwo knows of Test. Removing the require(); line from TestTwo.php will break the relation.

Removing the index() function from TestTwo will then result in only "test" being output by navigating to appurl/TestTwo/.

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