Module::getModule and Module::hasModule support for sub-modules - see #983

framework/yii/base/Module.php

@@ -333,7 +333,20 @@ abstract class Module extends Component
 	 */
 	public function hasModule($id)
 	{
+		if (strpos($id, '/') === false) {
 			return isset($this->_modules[$id]);
+		} else {
+			// it's a sub-module
+			$ids = explode('/', $id);
+			$module = $this;
+			foreach ($ids as $id) {
+				if (!isset($module->_modules[$id])) {
+					return false;
+				}
+				$module = $module->getModule($id);
+			}
+			return true;
+		}
 	}
 
 	/**
@@ -345,6 +358,7 @@ abstract class Module extends Component
 	 */
 	public function getModule($id, $load = true)
 	{
+		if (strpos($id, '/') === false) {
 			if (isset($this->_modules[$id])) {
 				if ($this->_modules[$id] instanceof Module) {
 					return $this->_modules[$id];
@@ -353,6 +367,15 @@ abstract class Module extends Component
 					return $this->_modules[$id] = Yii::createObject($this->_modules[$id], $id, $this);
 				}
 			}
+		} else {
+			// it's a sub-module
+			$ids = explode('/', $id);
+			$module = $this;
+			foreach ($ids as $id) {
+				$module = $module->getModule($id);
+			}
+			return $module;
+		}
 		return null;
 	}