惰性加载模型和库中的CI 3 __get魔法方法的控制器 [英] lazy load models and libraries in CI 3 __get magic method of controller
问题描述
我试图为CI 3.0.4中的模型+库写一个惰性加载器
I am attempting to write a lazy loader for models + libraries in CI 3.0.4
我试图得到如下所述的
Model/library lazy load in CodeIgniter
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,会出现以下错误。
This code seems to be for CI version 2 and when I tried to apply it to CI version 3.0.4 I get the following errors.
Severity: Notice
Message: Indirect modification of overloaded property Items::$benchmark has no effect
Filename: core/Controller.php
Line Number: 75
Fatal error: Cannot assign by reference to overloaded object in /Applications/MAMP/htdocs/phppos/PHP-Point-Of-Sale/system/core/Controller.php on line 75
这是我做的:
-
创建文件应用程序/ core / MY_Controller.php
Create file application/core/MY_Controller.php
创建以下代码:
//Lazy load based on http://stackoverflow.com/questions/17579449/model-library-lazy-load-in-codeigniter
function __get($name)
{
if (isset($this->$name) && $this->$name instanceof CI_Model)
{
return $this->$name;
}
}
}
b $ b
一旦我可以让这个工作没有错误;我将添加我的自定义逻辑来加载正确的模型或库。
Once I can get this to work without errors; I will add my custom logic to load the right model or library.
我想这样做而不修改核心。
I want to do this WITHOUT modifying core.
推荐答案
基于例子,我想出了以下不需要核心修改和工作在CI 3.0.4。
Based on example I have come up with the following that does NOT require core modifications and works in CI 3.0.4. It first tries to load a model and if the model does NOT exist it attempts to load a library.
-
创建文件应用程序/ core / MY_Controller.php
Create file 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;
}
}
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