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Fixes #1452: Added Module::getInstance() to allow accessing the module instance from anywhere within the module

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This commit is contained in:
Qiang Xue
2014-06-26 22:04:41 -04:00
parent 27943ce735
commit 8e96623a56
4 changed files with 63 additions and 13 deletions
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1
framework/base/Application.php
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@ -189,6 +189,7 @@ abstract class Application extends Module
public function __construct($config = [])
{
Yii::$app = $this;
$this->setInstance($this);
$this->state = self::STATE_BEGIN;

37
framework/base/Module.php
View File

@ -122,7 +122,10 @@ class Module extends ServiceLocator
* @var array child modules of this module
*/
private $_modules = [];
/**
* @var array list of currently requested modules indexed by their class names
*/
private static $_instances = [];
/**
* Constructor.
@ -137,6 +140,32 @@ class Module extends ServiceLocator
parent::__construct($config);
}
/**
* Returns the currently requested instance of this module class.
* If the module class is not currently requested, null will be returned.
* This method is provided so that you access the module instance from anywhere within the module.
* @return static|null the currently requested instance of this module class, or null if the module class is not requested.
*/
public static function getInstance()
{
$class = get_called_class();
return isset(self::$_instances[$class]) ? self::$_instances[$class] : null;
}
/**
* Sets the currently requested instance of this module class.
* @param Module|null $instance the currently requested instance of this module class.
* If it is null, the instance of the calling class will be removed, if any.
*/
public static function setInstance($instance)
{
if ($instance === null) {
unset(self::$_instances[get_class()]);
} else {
self::$_instances[get_class($instance)] = $instance;
}
}
/**
* Initializes the module.
*
@ -326,8 +355,10 @@ class Module extends ServiceLocator
if (is_array($this->_modules[$id]) && !isset($this->_modules[$id]['class'])) {
$this->_modules[$id]['class'] = 'yii\base\Module';
}
return $this->_modules[$id] = Yii::createObject($this->_modules[$id], [$id, $this]);
/** @var $module Module */
$module = Yii::createObject($this->_modules[$id], [$id, $this]);
$module->setInstance($module);
return $this->_modules[$id] = $module;
}
}