我正在关注Magento 知识库上的 Magento 开发人员教程，在我到达第 4 部分（请参阅链接）之后，我遇到了一个问题。我已经完成了本教程这一部分中指定的更改，之后，使用“/helloworld/index/index”控制器，浏览器会显示一个完全空的输出。之前填充的“goodbye”和“params”控制器看起来不错，“showConfig”XML 输出也是如此。
任何人都可以对此有所了解吗？以下是我在第 3 部分末尾的检查点的不同之处：
diff -r 98d31339093e -r fd26e7cbf555 magento/magento/app/code/local/Magentotutorial/Configviewer/Model/Observer.php
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/magento/magento/app/code/local/Magentotutorial/Configviewer/Model/Observer.php Thu Jul 05 09:02:36 2012 +0000
@@ -0,0 +1,32 @@
+<?php
+ class Magentotutorial_Configviewer_Model_Observer {
+ const FLAG_SHOW_CONFIG = 'showConfig';
+ const FLAG_SHOW_CONFIG_FORMAT = 'showConfigFormat';
+
+ private $request;
+
+ public function checkForConfigRequest($observer) {
+ $this->request = $observer->getEvent()->getData('front')->getRequest();
+ if($this->request->{self::FLAG_SHOW_CONFIG} === 'true'){
+ $this->setHeader();
+ $this->outputConfig();
+ }
+ }
+
+ private function setHeader() {
+ $format = isset($this->request->{self::FLAG_SHOW_CONFIG_FORMAT}) ?
+ $this->request->{self::FLAG_SHOW_CONFIG_FORMAT} : 'xml';
+ switch($format){
+ case 'text':
+ header("Content-Type: text/plain");
+ break;
+ default:
+ header("Content-Type: text/xml");
+ }
+ }
+
+ private function outputConfig() {
+ die(Mage::app()->getConfig()->getNode()->asXML());
+ }
+ }
+?>
diff -r 98d31339093e -r fd26e7cbf555 magento/magento/app/code/local/Magentotutorial/Configviewer/etc/config.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/magento/magento/app/code/local/Magentotutorial/Configviewer/etc/config.xml Thu Jul 05 09:02:36 2012 +0000
@@ -0,0 +1,20 @@
+<config>
+ <modules>
+ <Magentotutorial_Configviewer>
+ <version>0.1.0</version>
+ </Magentotutorial_Configviewer>
+ </modules>
+ <global>
+ <events>
+ <controller_front_init_routers>
+ <observers>
+ <Magentotutorial_configviewer_model_observer>
+ <type>singleton</type>
+ <class>Magentotutorial_Configviewer_Model_Observer</class>
+ <method>checkForConfigRequest</method>
+ </Magentotutorial_configviewer_model_observer>
+ </observers>
+ </controller_front_init_routers>
+ </events>
+ </global>
+</config>
diff -r 98d31339093e -r fd26e7cbf555 magento/magento/app/code/local/Magentotutorial/Helloworld/controllers/IndexController.php
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/magento/magento/app/code/local/Magentotutorial/Helloworld/controllers/IndexController.php Thu Jul 05 09:02:36 2012 +0000
@@ -0,0 +1,23 @@
+<?php
+class Magentotutorial_Helloworld_IndexController extends Mage_Core_Controller_Front_Action {
+
+ public function indexAction() {
+
+ echo 'Hello Index!';
+
+ }
+
+ public function goodbyeAction() {
+ echo 'Goodbye World!';
+ }
+
+ public function paramsAction() {
+ echo '<dl>';
+ foreach($this->getRequest()->getParams() as $key=>$value) {
+ echo '<dt><strong>Param: </strong>'.htmlspecialchars($key).'</dt>';
+ echo '<dt><strong>Value: </strong>'.htmlspecialchars($value).'</dt>';
+ }
+ echo '</dl>';
+ }
+}
+?>
diff -r 98d31339093e -r fd26e7cbf555 magento/magento/app/code/local/Magentotutorial/Helloworld/etc/config.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/magento/magento/app/code/local/Magentotutorial/Helloworld/etc/config.xml Thu Jul 05 09:02:36 2012 +0000
@@ -0,0 +1,18 @@
+<config>
+ <modules>
+ <Magentotutorial_Helloworld>
+ <version>0.1.0</version>
+ </Magentotutorial_Helloworld>
+ </modules>
+ <frontend>
+ <routers>
+ <helloworld>
+ <use>standard</use>
+ <args>
+ <module>Magentotutorial_Helloworld</module>
+ <frontName>helloworld</frontName>
+ </args>
+ </helloworld>
+ </routers>
+ </frontend>
+</config>
diff -r 98d31339093e -r fd26e7cbf555 magento/magento/app/etc/modules/Magentotutorial_Configviewer.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/magento/magento/app/etc/modules/Magentotutorial_Configviewer.xml Thu Jul 05 09:02:36 2012 +0000
@@ -0,0 +1,8 @@
+<config>
+ <modules>
+ <Magentotutorial_Configviewer>
+ <active>true</active>
+ <codePool>local</codePool>
+ </Magentotutorial_Configviewer>
+ </modules>
+</config>
diff -r 98d31339093e -r fd26e7cbf555 magento/magento/app/etc/modules/Magentotutorial_Helloworld.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/magento/magento/app/etc/modules/Magentotutorial_Helloworld.xml Thu Jul 05 09:02:36 2012 +0000
@@ -0,0 +1,8 @@
+<config>
+ <modules>
+ <Magentotutorial_Helloworld>
+ <active>true</active>
+ <codePool>local</codePool>
+ </Magentotutorial_Helloworld>
+ </modules>
+</config>
以下是导致问题的新差异：
diff -r fd26e7cbf555 magento/magento/app/code/local/Magentotutorial/Helloworld/controllers/IndexController.php
--- a/magento/magento/app/code/local/Magentotutorial/Helloworld/controllers/IndexController.php Thu Jul 05 09:02:36 2012 +0000
+++ b/magento/magento/app/code/local/Magentotutorial/Helloworld/controllers/IndexController.php Thu Jul 05 12:13:55 2012 +0000
@@ -3,7 +3,10 @@
public function indexAction() {
- echo 'Hello Index!';
+ // remove our previous echo
+ // echo 'Hello Index!';
+ $this->loadLayout();
+ $this->renderLayout();
}
diff -r fd26e7cbf555 magento/magento/app/code/local/Magentotutorial/Helloworld/simple_page.phtml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/magento/magento/app/code/local/Magentotutorial/Helloworld/simple_page.phtml Thu Jul 05 12:13:55 2012 +0000
@@ -0,0 +1,16 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+ "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+ <title>Untitled</title>
+ <meta name="generator" content="BBEdit 9.2" />
+ <style type="text/css">
+ body {
+ background-color:#f00;
+ }
+ </style>
+</head>
+<body>
+
+</body>
+</html>
diff -r fd26e7cbf555 magento/magento/app/design/frontend/base/default/layout/local.xml
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/magento/magento/app/design/frontend/base/default/layout/local.xml Thu Jul 05 12:13:55 2012 +0000
@@ -0,0 +1,7 @@
+<layout version="0.1.0">
+ <default>
+ <reference name="root">
+ <block type="page/html" name="root" output="toHtml" template="../../../../../code/local/Magentotutorial/Helloworld/simple_page.phtml" />
+ </reference>
+ </default>
+</layout>
提前致谢，
— 什洛米鱼