Fixes #1894: The path aliases `@webroot` and `@web` are now available right…

framework/CHANGELOG.md

@@ -57,6 +57,7 @@ Yii Framework 2 Change Log
 - Enh #1773: keyPrefix property of Cache is not restricted to alnum characters anymore, however it is still recommended (cebe)
 - Enh #1809: Added support for building "EXISTS" and "NOT EXISTS" query conditions (abdrasulov)
 - Enh #1852: ActiveRecord::tableName() now returns table name using DbConnection::tablePrefix (creocoder)
+- Enh #1894: The path aliases `@webroot` and `@web` are now available right after the application is initialized (qiangxue)
 - Enh: Added `favicon.ico` and `robots.txt` to default application templates (samdark)
 - Enh: Added `Widget::autoIdPrefix` to support prefixing automatically generated widget IDs (qiangxue)
 - Enh: Support for file aliases in console command 'message' (omnilight)

framework/web/Application.php

@@ -55,6 +55,17 @@ class Application extends \yii\base\Application
 
 
 	/**
+	 * @inheritdoc
+	 */
+	public function preloadComponents()
+	{
+		parent::preloadComponents();
+		$request = $this->getRequest();
+		Yii::setAlias('@webroot', dirname($request->getScriptFile()));
+		Yii::setAlias('@web', $request->getBaseUrl());
+	}
+
+	/**
 	 * Handles the specified request.
 	 * @param Request $request the request to be handled
 	 * @return Response the resulting response
@@ -62,9 +73,6 @@ class Application extends \yii\base\Application
 	 */
 	public function handleRequest($request)
 	{
-		Yii::setAlias('@webroot', dirname($request->getScriptFile()));
-		Yii::setAlias('@web', $request->getBaseUrl());
-
 		if (empty($this->catchAll)) {
 			list ($route, $params) = $request->resolve();
 		} else {