finished view.

framework/YiiBase.php

@@ -7,6 +7,8 @@
  * @license http://www.yiiframework.com/license/
  */
 
+use yii\base\Exception;
+
 /**
  * Gets the application start timestamp.
  */
@@ -126,7 +128,7 @@ class YiiBase
 	 * will be included only when the class is being used. This parameter is used only when
 	 * the path alias refers to a class.
 	 * @return string the class name or the directory that this alias refers to
-	 * @throws \yii\base\Exception if the path alias is invalid
+	 * @throws Exception if the path alias is invalid
 	 */
 	public static function import($alias, $forceInclude = false)
 	{
@@ -153,7 +155,7 @@ class YiiBase
 		}
 
 		if (($path = static::getAlias(dirname($alias))) === false) {
-			throw new \yii\base\Exception('Invalid path alias: ' . $alias);
+			throw new Exception('Invalid path alias: ' . $alias);
 		}
 
 		if ($isClass) {
@@ -184,10 +186,12 @@ class YiiBase
 	 *
 	 * Note, this method does not ensure the existence of the resulting path.
 	 * @param string $alias alias
-	 * @return mixed path corresponding to the alias, false if the root alias is not previously registered.
+	 * @param boolean $throwException whether to throw exception if the alias is invalid.
+	 * @return string|boolean path corresponding to the alias, false if the root alias is not previously registered.
+	 * @throws Exception if the alias is invalid and $throwException is true.
 	 * @see setAlias
 	 */
-	public static function getAlias($alias)
+	public static function getAlias($alias, $throwException = false)
 	{
 		if (isset(self::$aliases[$alias])) {
 			return self::$aliases[$alias];
@@ -199,7 +203,11 @@ class YiiBase
 				return self::$aliases[$alias] = self::$aliases[$rootAlias] . substr($alias, $pos);
 			}
 		}
-		return false;
+		if ($throwException) {
+			throw new Exception("Invalid path alias: $alias");
+		} else {
+			return false;
+		}
 	}
 
 	/**
@@ -218,7 +226,7 @@ class YiiBase
 	 * - a URL (e.g. `http://www.yiiframework.com`)
 	 * - a path alias (e.g. `@yii/base`). In this case, the path alias will be converted into the
 	 *   actual path first by calling [[getAlias]].
-	 * @throws \yii\base\Exception if $path is an invalid alias
+	 * @throws Exception if $path is an invalid alias
 	 * @see getAlias
 	 */
 	public static function setAlias($alias, $path)
@@ -230,7 +238,7 @@ class YiiBase
 		} elseif (($p = static::getAlias($path)) !== false) {
 			self::$aliases[$alias] = $p;
 		} else {
-			throw new \yii\base\Exception('Invalid path: ' . $path);
+			throw new Exception('Invalid path: ' . $path);
 		}
 	}
 
@@ -291,7 +299,7 @@ class YiiBase
 				include($classFile);
 				return true;
 			} else {
-				throw new \yii\base\Exception("Class name '$className' does not match the class file '" . realpath($classFile) . "'. Have you checked their case sensitivity?");
+				throw new Exception("Class name '$className' does not match the class file '" . realpath($classFile) . "'. Have you checked their case sensitivity?");
 			}
 		}
 
@@ -339,7 +347,7 @@ class YiiBase
 	 *
 	 * @param string|array $config the configuration. It can be either a string or an array.
 	 * @return mixed the created object
-	 * @throws \yii\base\Exception if the configuration is invalid.
+	 * @throws Exception if the configuration is invalid.
 	 * @see \yii\base\Object::newInstance()
 	 */
 	public static function createObject($config)
@@ -351,7 +359,7 @@ class YiiBase
 			$class = $config['class'];
 			unset($config['class']);
 		} else {
-			throw new \yii\base\Exception('Object configuration must be an array containing a "class" element.');
+			throw new Exception('Object configuration must be an array containing a "class" element.');
 		}
 
 		if (!class_exists($class, false)) {

framework/base/Controller.php

@@ -70,9 +70,12 @@ class Controller extends Component implements Initable
 	 */
 	public $action;
 	/**
-	 * @var View the view currently being used
+	 * @var string|boolean the name of the layout to be applied to this controller's views.
+	 * This property mainly affects the behavior of [[render()]].
+	 * Defaults to null, meaning the layout specified by the [[module]] should be used.
+	 * If false, no layout will be applied.
 	 */
-	private $_view;
+	public $layout;
 
 	/**
 	 * @param string $id ID of this controller
@@ -295,66 +298,39 @@ class Controller extends Component implements Initable
 	/**
 	 * This method is invoked right after an action renders its result using [[render()]].
 	 * @param string $view the view just rendered
+	 * @param string $content the content to be displayed
+	 * @return string the content to be displayed. This may be the same as the input content or the one
+	 * modified by event handlers.
 	 */
-	public function afterRender($view)
+	public function afterRender($view, $content)
 	{
-		$this->trigger(__METHOD__, new RenderEvent($view));
+		$event = new RenderEvent($view, $content);
+		$this->trigger(__METHOD__, $event);
+		return $event->content;
 	}
 
 	public function render($view, $params = array())
 	{
 		if ($this->beforeRender($view)) {
-			$v = $this->createView();
-			if (($theme = \Yii::$application->getTheme()) !== null) {
-				$v->basePath[] = $theme->getViewPath($this);
-				$v->rootPath[] = $theme->getViewPath();
-			}
-			$v->basePath[] = $this->getViewPath();
-			$v->rootPath[] = \Yii::$application->getViewPath();
-			$v->render($view, $params);
-			$this->afterRender($view);
+			$content = $this->createView()->render($view, $params);
+			$content = $this->afterRender($view, $content);
+			return $content;
 		}
+		return '';
 	}
 
 	public function renderText($text)
 	{
-
+		return $this->createView()->renderText($text);
 	}
 
 	public function renderPartial($view, $params = array())
 	{
-
-
-	}
-
-	public function resolveLayout()
-	{
-		$layout = $this->layout;
-		$module = $this->module;
-		while ($layout === null && $module !== null) {
-			$layout = $module->layout;
-			$module = $module->module;
-			$layout = $
-		}
-	}
-
-	public function getView()
-	{
-		if ($this->_view === null) {
-			$this->_view = $this->createView();
-			$this->_view->owner = $this;
-			if (($theme = \Yii::$application->getTheme()) !== null) {
-				$this->_view->basePath[] = $theme->getViewPath($this);
-				$this->_view->rootPath[] = $theme->getViewPath();
-			}
-			$this->_view->basePath[] = $this->getViewPath();
-			$this->_view->rootPath[] = \Yii::$application->getViewPath();
-		}
-		return $this->_view;
+		return $this->createView()->renderPartial($view, $params);
 	}
 
 	public function createView()
 	{
-		return new View;
+		return new View($this);
 	}
 }

framework/base/ErrorHandler.php

@@ -319,7 +319,7 @@ class ErrorHandler extends ApplicationComponent
 	public function renderAsHtml($exception)
 	{
 		$view = new View;
-		$view->owner = $this;
+		$view->context = $this;
 		$name = !YII_DEBUG || $exception instanceof HttpException ? $this->errorView : $this->exceptionView;
 		echo $view->render($name, array(
 			'exception' => $exception,

framework/base/RenderEvent.php

@@ -24,6 +24,10 @@ class RenderEvent extends Event
 	 */
 	public $view;
 	/**
+	 * @var string the content to be displayed
+	 */
+	public $content;
+	/**
 	 * @var boolean whether the action is in valid state and its life cycle should proceed.
 	 */
 	public $isValid = true;

framework/base/Theme.php

@@ -23,90 +23,39 @@ class Theme extends ApplicationComponent
 	public function init()
 	{
 		if ($this->basePath !== null) {
-			$this->basePath = \Yii::getAlias($this->basePath);
+			$this->basePath = \Yii::getAlias($this->basePath, true);
 		} else {
 			throw new Exception("Theme.basePath must be set.");
 		}
 		if ($this->baseUrl !== null) {
-			$this->baseUrl = \Yii::getAlias($this->baseUrl);
+			$this->baseUrl = \Yii::getAlias($this->baseUrl, true);
 		} else {
 			throw new Exception("Theme.baseUrl must be set.");
 		}
 	}
 
 	/**
-	 * @param Controller $controller
+	 * @param Application|Module|Controller|Object $context
 	 * @return string
 	 */
-	public function getViewPath($controller = null)
+	public function getViewPath($context = null)
 	{
-		$path = $this->basePath . DIRECTORY_SEPARATOR . 'views';
-		return $controller === null ? $path : $path . DIRECTORY_SEPARATOR . $controller->id;
-	}
-
-	public function getLayoutPath($module = null)
-	{
-		$path = $this->getViewPath($module);
-		return $controller === null ? $path : $path . DIRECTORY_SEPARATOR . $controller->id;
-	}
-
-	public function getWidgetViewPath($widget)
-	{
-
-	}
-
-	/**
-	 * @return string the path for controller views. Defaults to 'ThemeRoot/views'.
-	 */
-	public function getViewPath()
-	{
-		return $this->_basePath . DIRECTORY_SEPARATOR . 'views';
-	}
-
-	/**
-	 * Finds the view file for the specified controller's view.
-	 * @param CController $controller the controller
-	 * @param string $viewName the view name
-	 * @return string the view file path. False if the file does not exist.
-	 */
-	public function getViewFile($controller, $viewName)
-	{
-		$moduleViewPath = $this->getViewPath();
-		if (($module = $controller->getModule()) !== null)
-				{
-					$moduleViewPath .= '/' . $module->getId();
-				}
-		return $controller->resolveViewFile($viewName, $this->getViewPath() . '/' . $controller->getUniqueId(), $this->getViewPath(), $moduleViewPath);
+		$viewPath = $this->basePath . DIRECTORY_SEPARATOR . 'views';
+		if ($context === null || $context instanceof Application) {
+			return $viewPath;
+		} elseif ($context instanceof Controller || $context instanceof Module) {
+			return $viewPath . DIRECTORY_SEPARATOR . $context->getUniqueId();
+		} else {
+			return $viewPath . DIRECTORY_SEPARATOR . str_replace('\\', '_', get_class($context));
+		}
 	}
 
 	/**
-	 * Finds the layout file for the specified controller's layout.
-	 * @param CController $controller the controller
-	 * @param string $layoutName the layout name
-	 * @return string the layout file path. False if the file does not exist.
+	 * @param Module $module
+	 * @return string
 	 */
-	public function getLayoutFile($controller, $layoutName)
+	public function getLayoutPath($module = null)
 	{
-		$moduleViewPath = $basePath = $this->getViewPath();
-		$module = $controller->getModule();
-		if (empty($layoutName)) {
-			while ($module !== null) {
-				if ($module->layout === false)
-					return false;
-				if (!empty($module->layout))
-					break;
-				$module = $module->getParentModule();
-			}
-			if ($module === null)
-				$layoutName = Yii::app()->layout;
-			else {
-				$layoutName = $module->layout;
-				$moduleViewPath .= '/' . $module->getId();
-			}
-		}
-		else if ($module !== null)
-			$moduleViewPath .= '/' . $module->getId();
-
-		return $controller->resolveViewFile($layoutName, $moduleViewPath . '/layouts', $basePath, $moduleViewPath);
+		return $this->getViewPath($module) . DIRECTORY_SEPARATOR . 'layouts';
 	}
 }

framework/base/View.php

@@ -10,6 +10,7 @@
 namespace yii\base;
 
 use yii\util\FileHelper;
+use yii\base\Application;
 
 /**
  * @author Qiang Xue <qiang.xue@gmail.com>
@@ -18,26 +19,18 @@ use yii\util\FileHelper;
 class View extends Component
 {
 	/**
-	 * @var Object the owner of this view
+	 * @var Controller|Widget|Object the context under which this view is being rendered
 	 */
-	public $owner;
+	public $context;
 	/**
-	 * @var string|array the directories where the view file should be looked for a *relative* view name is given.
+	 * @var string|array the directories where the view file should be looked for when a *relative* view name is given.
 	 * This can be either a string representing a single directory, or an array representing multiple directories.
-	 * If the latter, the view file will be looked for in the given directories in the order they are specified.
-	 * Path aliases can be used. This property must be set before calling [[render()]] with a relative view name.
+	 * If the latter, the view file will be looked for in the directories in the order they are specified.
+	 * Path aliases can be used. If this property is not set, relative view names should be treated as absolute ones.
 	 * @see roothPath
 	 */
 	public $basePath;
 	/**
-	 * @var string|array the directories where the view file should be looked for an *absolute* view name is given.
-	 * This can be either a string representing a single directory, or an array representing multiple directories.
-	 * If the latter, the view file will be looked for in the given directories in the order they are specified.
-	 * Path aliases can be used. This property must be set before calling [[render()]] with an absolute view name.
-	 * @see basePath
-	 */
-	public $rootPath;
-	/**
 	 * @var string the language that the view should be rendered in. If not set, it will use
 	 * the value of [[Application::language]].
 	 */
@@ -48,11 +41,47 @@ class View extends Component
 	 */
 	public $sourceLanguage;
 	/**
+	 * @var boolean whether to localize the view when possible. Defaults to true.
+	 * Note that when this is true, if a localized view cannot be found, the original view will be rendered.
+	 * No error will be reported.
+	 */
+	public $localizeView = true;
+	/**
+	 * @var boolean whether to theme the view when possible. Defaults to true.
+	 * Note that theming will be disabled if [[Application::theme]] is null.
+	 */
+	public $themeView = true;
+	/**
 	 * @var mixed custom parameters that are available in the view template
 	 */
 	public $params;
 
 	/**
+	 * Constructor.
+	 * @param Controller|Widget|Object $context the context under which this view is being rendered (e.g. controller, widget)
+	 */
+	public function __construct($context = null)
+	{
+		$this->context = $context;
+	}
+
+	public function render($view, $params = array())
+	{
+		$content = $this->renderPartial($view, $params);
+		return $this->renderText($content);
+	}
+
+	public function renderText($text)
+	{
+		$layoutFile = $this->findLayoutFile();
+		if ($layoutFile !== false) {
+			return $this->renderFile($layoutFile, array('content' => $text));
+		} else {
+			return $text;
+		}
+	}
+
+	/**
 	 * Renders a view.
 	 *
 	 * The method first finds the actual view file corresponding to the specified view.
@@ -72,7 +101,7 @@ class View extends Component
 	 * @return string the rendering result
 	 * @throws Exception if the view file cannot be found
 	 */
-	public function render($view, $params = array())
+	public function renderPartial($view, $params = array())
 	{
 		$file = $this->findViewFile($view);
 		if ($file !== false) {
@@ -96,7 +125,7 @@ class View extends Component
 	public function createWidget($class, $properties = array())
 	{
 		$properties['class'] = $class;
-		return \Yii::createObject($properties, $this->owner);
+		return \Yii::createObject($properties, $this->context);
 	}
 
 	public function widget($class, $properties = array())
@@ -156,7 +185,6 @@ class View extends Component
 
 	/**
 	 * Ends recording a clip.
-	 * This method is an alias to {@link endWidget}.
 	 */
 	public function endClip()
 	{
@@ -262,35 +290,165 @@ class View extends Component
 		if (($extension = FileHelper::getExtension($view)) === '') {
 			$view .= '.php';
 		}
-		if ($view[0] === '@') {
+		if (strncmp($view, '@', 1) === 0) {
 			$file = \Yii::getAlias($view);
-			if ($file === false) {
-				return false;
+		} elseif (strncmp($view, '/', 1) !== 0) {
+			$file = $this->findRelativeViewFile($view);
+		} else {
+			$file = $this->findAbsoluteViewFile($view);
+		}
+
+		if ($file === false || !is_file($file)) {
+			return false;
+		} elseif ($this->localizeView) {
+			return FileHelper::localize($file, $this->language, $this->sourceLanguage);
+		} else {
+			return $file;
+		}
+	}
+
+	/**
+	 * Finds the view file corresponding to the given relative view name.
+	 * The method will look for the view file under a set of directories returned by [[resolveBasePath()]].
+	 * If no base path is given, the view will be treated as an absolute view and the result of
+	 * [[findAbsoluteViewFile()]] will be returned.
+	 * @param string $view the relative view name
+	 * @return string|boolean the view file path, or false if the view file cannot be found
+	 */
+	protected function findRelativeViewFile($view)
+	{
+		$paths = $this->resolveBasePath();
+		if ($paths === array()) {
+			return $this->findAbsoluteViewFile($view);
+		}
+		if ($this->themeView && $this->context !== null && ($theme = \Yii::$application->getTheme()) !== null) {
+			array_unshift($paths, $theme->getViewPath($this->context));
+		}
+		foreach ($paths as $path) {
+			$file = \Yii::getAlias($path . '/' . $view);
+			if ($file !== false && is_file($file)) {
+				return $file;
+			}
+		}
+		return $paths === array() ? $this->findAbsoluteViewFile($view) : false;
+	}
+
+	/**
+	 * Finds the view file corresponding to the given absolute view name.
+	 * If the view name starts with double slashes `//`, the method will look for the view file
+	 * under [[Application::getViewPath()]]. Otherwise, it will look for the view file under the
+	 * view path of the currently active module.
+	 * @param string $view the absolute view name
+	 * @return string|boolean the view file path, or false if the view file cannot be found
+	 */
+	protected function findAbsoluteViewFile($view)
+	{
+		$app = \Yii::$application;
+		if (strncmp($view, '//', 2) !== 0 && $app->controller !== null) {
+			$module = $app->controller->module;
+		} else {
+			$module = $app;
+		}
+		if ($this->themeView && ($theme = $app->getTheme()) !== null) {
+			$paths[] = $theme->getViewPath($module);
+		}
+		$paths[] = $module->getViewPath();
+		$view = ltrim($view, '/');
+		foreach ($paths as $path) {
+			$file = \Yii::getAlias($path . '/' . $view);
+			if ($file !== false && is_file($file)) {
+				return $file;
 			}
+		}
+		return false;
+	}
+
+	/**
+	 * Resolves the base paths that will be used to determine view files for relative view names.
+	 * The method resolves the base path using the following algorithm:
+	 *
+	 * - If [[basePath]] is not empty, it is returned;
+	 * - If [[context]] is a controller, it will return the subdirectory named as
+	 *   [[Controller::uniqueId]] under the controller's module view path;
+	 * - If [[context]] is an object, it will return the `views` subdirectory under
+	 *   the directory containing the object class file.
+	 * - Otherwise, it will return false.
+	 * @return array the base paths
+	 */
+	protected function resolveBasePath()
+	{
+		if (!empty($this->basePath)) {
+			return is_array($this->basePath) ? $this->basePath : array($this->basePath);
+		} elseif ($this->context instanceof Controller) {
+			return $this->context->module->getViewPath() . '/' . $this->context->getUniqueId();
+		} elseif ($this->context !== null) {
+			$class = new \ReflectionClass($this->context);
+			return array(dirname($class->getFileName()) . '/views');
 		} else {
-			if ($view[0] === '/') {
-				$paths = $this->rootPath;
-				$view = substr($view, 1);
-			} else {
-				$paths = $this->basePath;
+			return array();
+		}
+	}
+
+	/**
+	 * Finds the layout file for the current [[context]].
+	 * The method will return false if [[context]] is not a controller.
+	 * When [[context]] is a controller, the following algorithm is used to determine the layout file:
+	 *
+	 * - If `context.layout` is false, it will return false;
+	 * - If `context.layout` is a string, it will look for the layout file under the [[Module::layoutPath|layout path]]
+	 *   of the controller's parent module;
+	 * - If `context.layout` is null, the following steps are taken to resolve the actual layout to be returned:
+	 *      * Check the `layout` property of the parent module. If it is null, check the grand parent module and so on
+	 *        until a non-null layout is encountered. Let's call this module the *effective module*.
+	 *      * If the layout is null or false, it will return false;
+	 *      * Otherwise, it will look for the layout file under the layout path of the effective module.
+	 *
+	 * The themed layout file will be returned if theme is enabled and the theme contains such a layout file.
+	 *
+	 * @return string|boolean the layout file path, or false if the context does not need layout.
+	 * @throws Exception if the layout file cannot be found
+	 */
+	public function findLayoutFile()
+	{
+		if (!$this->context instanceof Controller || $this->context->layout === false) {
+			return false;
+		}
+		$module = $this->context->module;
+		while ($module !== null && $module->layout === null) {
+			$module = $module->module;
+		}
+		if ($module === null || $module->layout === null || $module->layout === false) {
+			return false;
+		}
+
+		$view = $module->layout;
+		if (($extension = FileHelper::getExtension($view)) === '') {
+			$view .= '.php';
+		}
+		if (strncmp($view, '@', 1) === 0) {
+			$file = \Yii::getAlias($view);
+		} elseif (strncmp($view, '/', 1) === 0) {
+			$file = $this->findAbsoluteViewFile($view);
+		} else {
+			if ($this->themeView && ($theme = \Yii::$application->getTheme()) !== null) {
+				$paths[] = $theme->getLayoutPath($module);
 			}
-			if (!empty($paths)) {
-				if (!is_array($paths)) {
-					$paths = array($paths);
-				}
-				foreach ($paths as $path) {
-					$file = \Yii::getAlias($path . '/' . $view);
-					if (is_file($file)) {
-						break;
-					}
+			$paths[] = $module->getLayoutPath();
+			$file = false;
+			foreach ($paths as $path) {
+				$f = \Yii::getAlias($path . '/' . $view);
+				if ($f !== false && is_file($f)) {
+					$file = $f;
+					break;
 				}
 			}
 		}
-		if (isset($file) && is_file($file)) {
-			$file = FileHelper::localize($file, $this->language, $this->sourceLanguage);
-			return is_file($file) ? $file : false;
+		if ($file === false || !is_file($file)) {
+			throw new Exception("Unable to find the layout file for layout '{$module->layout}' (specified by " . get_class($module) . ")");
+		} elseif ($this->localizeView) {
+			return FileHelper::localize($file, $this->language, $this->sourceLanguage);
 		} else {
-			return false;
+			return $file;
 		}
 	}
 }

framework/base/Widget.php

@@ -98,7 +98,7 @@ class Widget extends Component implements Initable
 	 */
 	public function render($view, $params = array())
 	{
-		return $this->createView()->render($view, $params);
+		return $this->createView()->renderPartial($view, $params);
 	}
 
 	/**
@@ -106,12 +106,6 @@ class Widget extends Component implements Initable
 	 */
 	public function createView()
 	{
-		$view = new View;
-		if (($theme = \Yii::$application->getTheme()) !== null) {
-			$view->basePath[] = $theme->getViewPath() . DIRECTORY_SEPARATOR . str_replace('\\', '_', get_class($this));
-		}
-		$class = new \ReflectionClass($this);
-		$view->basePath[] = dirname($class->getFileName()) . DIRECTORY_SEPARATOR . 'views';
-		return $view;
+		return new View($this);
 	}
 }

framework/caching/Cache.php

@@ -47,7 +47,7 @@
  * @package system.caching
  * @since 1.0
  */
-abstract class CCache extends CApplicationComponent implements ICache, ArrayAccess
+abstract class Cache extends ApplicationComponent implements \ArrayAccess
 {
 	/**
 	 * @var string a string prefixed to every cache key so that it is unique. Defaults to null which means
@@ -64,7 +64,7 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 * cache keys, otherwise there might be unexpected behavior.
 	 * @since 1.1.11
 	 **/
-	public $hashKey=true;
+	public $hashKey = true;
 
 	/**
 	 * @var boolean whether to automatically serialize/unserialize the cache values. Defaults to true. Setting this property to false makes sure the cache
@@ -76,7 +76,7 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 * configure a dedicated cache component for the sole purpose of storing raw unserialized data, the main cache component should always support serialization.
 	 * @since 1.1.11
 	 **/
-	public $autoSerialize=true;
+	public $autoSerialize = true;
 
 	/**
 	 * @var boolean wether to make use of the {@link http://pecl.php.net/package/igbinary igbinary} serializer for cache entry serialization. Defaults to false.
@@ -84,7 +84,7 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 * serializer. Since the two serialization formats are incompatible, caches should be purged before switching this on to prevent errors.
 	 * @since 1.1.11
 	 */
-	public $useIgbinarySerializer=false;
+	public $useIgbinarySerializer = false;
 
 	/**
 	 * Initializes the application component.
@@ -93,9 +93,10 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	public function init()
 	{
 		parent::init();
-		if($this->keyPrefix===null)
-			$this->keyPrefix=Yii::app()->getId();
-		$this->useIgbinarySerializer=$this->useIgbinarySerializer&&extension_loaded('igbinary');
+		if ($this->keyPrefix === null) {
+			$this->keyPrefix = Yii::app()->getId();
+		}
+		$this->useIgbinarySerializer = $this->useIgbinarySerializer && extension_loaded('igbinary');
 	}
 
 	/**
@@ -104,7 +105,7 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 */
 	protected function generateUniqueKey($key)
 	{
-		return $this->hashKey ? md5($this->keyPrefix.$key) : $this->keyPrefix.$key;
+		return $this->hashKey ? md5($this->keyPrefix . $key) : $this->keyPrefix . $key;
 	}
 
 	/**
@@ -114,12 +115,10 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 */
 	public function get($id)
 	{
-		if(($value=$this->getValue($this->generateUniqueKey($id)))!==false)
-		{
-			$data=$this->autoSerialize ? $this->unserializeValue($value) : $value;
-			if(!$this->autoSerialize || (is_array($data) && (!($data[1] instanceof ICacheDependency) || !$data[1]->getHasChanged())))
-			{
-				Yii::trace('Serving "'.$id.'" from cache','system.caching.'.get_class($this));
+		if (($value = $this->getValue($this->generateUniqueKey($id))) !== false) {
+			$data = $this->autoSerialize ? $this->unserializeValue($value) : $value;
+			if (!$this->autoSerialize || (is_array($data) && (!($data[1] instanceof ICacheDependency) || !$data[1]->getHasChanged()))) {
+				Yii::trace('Serving "' . $id . '" from cache', 'system.caching.' . get_class($this));
 				return $this->autoSerialize ? $data[0] : $data;
 			}
 		}
@@ -138,23 +137,21 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 */
 	public function mget($ids)
 	{
-		$uniqueIDs=array();
-		$results=array();
-		foreach($ids as $id)
-		{
-			$uniqueIDs[$id]=$this->generateUniqueKey($id);
-			$results[$id]=false;
+		$uniqueIDs = array();
+		$results = array();
+		foreach ($ids as $id) {
+			$uniqueIDs[$id] = $this->generateUniqueKey($id);
+			$results[$id] = false;
 		}
-		$values=$this->getValues($uniqueIDs);
-		foreach($uniqueIDs as $id=>$uniqueID)
-		{
-			if(!isset($values[$uniqueID]))
+		$values = $this->getValues($uniqueIDs);
+		foreach ($uniqueIDs as $id => $uniqueID) {
+			if (!isset($values[$uniqueID])) {
 				continue;
-			$data=$this->autoSerialize ? $this->unserializeValue($values[$uniqueID]) : $values[$uniqueID];
-			if(!$this->autoSerialize || (is_array($data) && (!($data[1] instanceof ICacheDependency) || !$data[1]->getHasChanged())))
-			{
-				Yii::trace('Serving "'.$id.'" from cache','system.caching.'.get_class($this));
-				$results[$id]=$this->autoSerialize ? $data[0] : $data;
+			}
+			$data = $this->autoSerialize ? $this->unserializeValue($values[$uniqueID]) : $values[$uniqueID];
+			if (!$this->autoSerialize || (is_array($data) && (!($data[1] instanceof ICacheDependency) || !$data[1]->getHasChanged()))) {
+				Yii::trace('Serving "' . $id . '" from cache', 'system.caching.' . get_class($this));
+				$results[$id] = $this->autoSerialize ? $data[0] : $data;
 			}
 		}
 		return $results;
@@ -171,13 +168,14 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 * @param ICacheDependency $dependency dependency of the cached item. If the dependency changes, the item is labeled invalid.
 	 * @return boolean true if the value is successfully stored into cache, false otherwise
 	 */
-	public function set($id,$value,$expire=0,$dependency=null)
+	public function set($id, $value, $expire = 0, $dependency = null)
 	{
-		Yii::trace('Saving "'.$id.'" to cache','system.caching.'.get_class($this));
-		if($dependency!==null && $this->autoSerialize)
+		Yii::trace('Saving "' . $id . '" to cache', 'system.caching.' . get_class($this));
+		if ($dependency !== null && $this->autoSerialize) {
 			$dependency->evaluateDependency();
-		$data=$this->autoSerialize ? $this->serializeValue(array($value,$dependency)) : $value;
-		return $this->setValue($this->generateUniqueKey($id),$data,$expire);
+		}
+		$data = $this->autoSerialize ? $this->serializeValue(array($value, $dependency)) : $value;
+		return $this->setValue($this->generateUniqueKey($id), $data, $expire);
 	}
 
 	/**
@@ -189,13 +187,14 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 * @param ICacheDependency $dependency dependency of the cached item. If the dependency changes, the item is labeled invalid.
 	 * @return boolean true if the value is successfully stored into cache, false otherwise
 	 */
-	public function add($id,$value,$expire=0,$dependency=null)
+	public function add($id, $value, $expire = 0, $dependency = null)
 	{
-		Yii::trace('Adding "'.$id.'" to cache','system.caching.'.get_class($this));
-		if($dependency!==null && $this->autoSerialize)
+		Yii::trace('Adding "' . $id . '" to cache', 'system.caching.' . get_class($this));
+		if ($dependency !== null && $this->autoSerialize) {
 			$dependency->evaluateDependency();
-		$data=$this->autoSerialize ? $this->serializeValue(array($value,$dependency)) : $value;
-		return $this->addValue($this->generateUniqueKey($id),$data,$expire);
+		}
+		$data = $this->autoSerialize ? $this->serializeValue(array($value, $dependency)) : $value;
+		return $this->addValue($this->generateUniqueKey($id), $data, $expire);
 	}
 
 	/**
@@ -205,7 +204,7 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 */
 	public function delete($id)
 	{
-		Yii::trace('Deleting "'.$id.'" from cache','system.caching.'.get_class($this));
+		Yii::trace('Deleting "' . $id . '" from cache', 'system.caching.' . get_class($this));
 		return $this->deleteValue($this->generateUniqueKey($id));
 	}
 
@@ -216,7 +215,7 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 */
 	public function flush()
 	{
-		Yii::trace('Flushing cache','system.caching.'.get_class($this));
+		Yii::trace('Flushing cache', 'system.caching.' . get_class($this));
 		return $this->flushValues();
 	}
 
@@ -232,8 +231,8 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 */
 	protected function getValue($key)
 	{
-		throw new CException(Yii::t('yii','{className} does not support get() functionality.',
-			array('{className}'=>get_class($this))));
+		throw new CException(Yii::t('yii', '{className} does not support get() functionality.',
+			array('{className}' => get_class($this))));
 	}
 
 	/**
@@ -247,9 +246,10 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 */
 	protected function getValues($keys)
 	{
-		$results=array();
-		foreach($keys as $key)
-			$results[$key]=$this->getValue($key);
+		$results = array();
+		foreach ($keys as $key) {
+			$results[$key] = $this->getValue($key);
+		}
 		return $results;
 	}
 
@@ -266,10 +266,10 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 * @return boolean true if the value is successfully stored into cache, false otherwise
 	 * @throws CException if this method is not overridden by child classes
 	 */
-	protected function setValue($key,$value,$expire)
+	protected function setValue($key, $value, $expire)
 	{
-		throw new CException(Yii::t('yii','{className} does not support set() functionality.',
-			array('{className}'=>get_class($this))));
+		throw new CException(Yii::t('yii', '{className} does not support set() functionality.',
+			array('{className}' => get_class($this))));
 	}
 
 	/**
@@ -285,10 +285,10 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 * @return boolean true if the value is successfully stored into cache, false otherwise
 	 * @throws CException if this method is not overridden by child classes
 	 */
-	protected function addValue($key,$value,$expire)
+	protected function addValue($key, $value, $expire)
 	{
-		throw new CException(Yii::t('yii','{className} does not support add() functionality.',
-			array('{className}'=>get_class($this))));
+		throw new CException(Yii::t('yii', '{className} does not support add() functionality.',
+			array('{className}' => get_class($this))));
 	}
 
 	/**
@@ -300,8 +300,8 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 */
 	protected function deleteValue($key)
 	{
-		throw new CException(Yii::t('yii','{className} does not support delete() functionality.',
-			array('{className}'=>get_class($this))));
+		throw new CException(Yii::t('yii', '{className} does not support delete() functionality.',
+			array('{className}' => get_class($this))));
 	}
 
 	/**
@@ -313,8 +313,8 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 */
 	protected function flushValues()
 	{
-		throw new CException(Yii::t('yii','{className} does not support flushValues() functionality.',
-			array('{className}'=>get_class($this))));
+		throw new CException(Yii::t('yii', '{className} does not support flushValues() functionality.',
+			array('{className}' => get_class($this))));
 	}
 
 	/**
@@ -329,8 +329,9 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 **/
 	protected function serializeValue($value)
 	{
-		if($this->useIgbinarySerializer)
+		if ($this->useIgbinarySerializer) {
 			return igbinary_serialize($value);
+		}
 		return serialize($value);
 	}
 
@@ -346,8 +347,9 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 **/
 	protected function unserializeValue($value)
 	{
-		if($this->useIgbinarySerializer)
+		if ($this->useIgbinarySerializer) {
 			return igbinary_unserialize($value);
+		}
 		return unserialize($value);
 	}
 
@@ -359,7 +361,7 @@ abstract class CCache extends CApplicationComponent implements ICache, ArrayAcce
 	 */
 	public function offsetExists($id)
 	{
-		return $this->get($id)!==false;
+		return $this->get($id) !== false;
 	}
 
 	/**