Question

我正在尝试为CI 3.0.4中的模型+库编写一个延迟加载器

我试图按照以下描述获得以下内容：

此代码似乎适用于CI版本2，当我尝试将其应用于CI版本3.0.4时，我收到以下错误。

Severity: Notice

Message: Indirect modification of overloaded property Items::$benchmark has no effect

Filename: core/Controller.php

Line Number: 75


Fatal error: Cannot assign by reference to overloaded object in /Applications/MAMP/htdocs/phppos/PHP-Point-Of-Sale/system/core/Controller.php on line 75

这是我做的：

创建文件application / core / MY_Controller.php

创建以下代码：

    //Lazy load based on https://stackoverflow.com/questions/17579449/model-library-lazy-load-in-codeigniter
    function __get($name)
    {
       if (isset($this->$name) && $this->$name instanceof CI_Model) 
        {
              return $this->$name;
        }
    }
  }

一旦我可以毫无错误地使用它;我将添加我的自定义逻辑来加载正确的模型或库。

我想在不修改核心的情况下这样做。

Answer 1

基于示例，我提出了以下内容，它不需要核心修改，并且可以在CI 3.0.4中使用。它首先尝试加载模型，如果模型不存在，它会尝试加载库。

创建文件application / core / MY_Controller.php

将这些内容放入其中。

<?php
class MY_Controller extends CI_Controller 
{

    //Lazy loading based on http://stackoverflow.com/questions/17579449/model-library-lazy-load-in-codeigniter
    public function __construct()
    {
        foreach (is_loaded() as $var => $class)
        {
             $this->$var = '';
        }

        $this->load = '';
        parent::__construct();
    }


    // Lazy load models + libraries....If we can't load a model that we have; then we will try to load library $name
    public function __get($name)
    {
        //Cache models so we only scan model dir once

        static $models = FALSE;
        $this->load->helper('file');

        if (!$models)
        {
            $model_files = get_filenames(APPPATH.'models', TRUE);
            foreach($model_files as $model_file)
            {
                $model_relative_name = str_replace('.php','',substr($model_file,strlen(APPPATH.'models'.DIRECTORY_SEPARATOR)));
                $model_folder = strpos($model_relative_name, DIRECTORY_SEPARATOR) !== FALSE ? substr($model_relative_name,0,strrpos($model_relative_name,DIRECTORY_SEPARATOR)) : '';
                $model_name = str_replace($model_folder.DIRECTORY_SEPARATOR, '',$model_relative_name);

                $models[$model_name] = $model_folder.'/'.$model_name;
            }
        }

        if (isset($models[$name]))
        {
            $this->load->model($models[$name]);
            return $this->$name;
        }
        else //Try a library if we cannot load a model
        {
            $this->load->library($name);
            return $this->$name;
        }

        return NULL;
    }
}

延迟加载模型和库中的CI 3 __get魔法控制器方法

1 个答案: