在 Magento 中覆盖/重载控制器类

Question

我试图重载/覆盖 Magento 中的 CategoryController 类，但每次都会遇到 404 错误。我遵循了在网上找到的许多指南，但似乎仍然存在不足。

etc/config.xml

<?xml version="1.0"?><config>
<modules>
    <LHM_CategoryLanding>
        <version>0.1.0</version>
    </LHM_CategoryLanding>
</modules>
<!--<global>
    <rewrite>
        <lhm_categorylanding_catalog_category>
            <from><![CDATA[#^/catalog/category/#]]></from>
            <to>categorylanding/catalog_category/</to>
        </lhm_categorylanding_catalog_category>
    </rewrite>
</global>-->
<frontend>
    <routers>
        <catalog>
            <args>
                <modules>
                    <LHM_CategoryLanding before="Mage_Catalog">LHM_CategoryLanding_Catalog</LHM_CategoryLanding>
                </modules>
            </args>
        </catalog>
        <!--
        <lhm_categorylanding>
            <use>standard</use>
            <args>
                <module>LHM_CategoryLanding</module>
                <frontName>categorylanding</frontName>
            </args>
        </lhm_categorylanding>
        -->
    </routers>
</frontend>
</config>

controller/Catalog/CategoryController.php

<?php

// This is needed since Varien used a layout that is not easily auto-loadable
require_once("Mage/Catalog/controllers/CategoryController.php");

class LHM_CategoryLanding_Catalog_CategoryController extends Mage_Catalog_CategoryController
{
/**
 * Initialize requested category object
 *
 * @return Mage_Catalog_Model_Category
 */
protected function _initCatagory()
{
    Mage::dispatchEvent('catalog_controller_category_init_before', array('controller_action'=>$this));
    $categoryId = (int) $this->getRequest()->getParam('id', false);
    if (!$categoryId) {
        return false;
    }

    $category = Mage::getModel('catalog/category')
        ->setStoreId(Mage::app()->getStore()->getId())
        ->load($categoryId);

    if (!Mage::helper('catalog/category')->canShow($category)) {
        return false;
    }
    Mage::getSingleton('catalog/session')->setLastVisitedCategoryId($category->getId());
    Mage::register('current_category', $category);
    try {
        Mage::dispatchEvent('catalog_controller_category_init_after', array('category'=>$category, 'controller_action'=>$this));
    } catch (Mage_Core_Exception $e) {
        Mage::logException($e);
        return false;
    }
    return $category;
}

/**
 * Category view action
 */
public function viewAction()
{

    if ($category = $this->_initCatagory()) {

        Mage::getModel('catalog/design')->applyDesign($category, Mage_Catalog_Model_Design::APPLY_FOR_CATEGORY);
        Mage::getSingleton('catalog/session')->setLastViewedCategoryId($category->getId());

        $update = $this->getLayout()->getUpdate();
        $update->addHandle('default');

        if (!$category->hasChildren()) {
            $update->addHandle('catalog_category_layered_nochildren');
        }

        $this->addActionLayoutHandles();            

        $update->addHandle($category->getLayoutUpdateHandle());
        $update->addHandle('CATEGORY_'.$category->getId());

        if ($category->getPageLayout()) {
                $this->getLayout()->helper('page/layout')
                    ->applyHandle($category->getPageLayout());
        }

        $this->loadLayoutUpdates();

        $update->addUpdate($category->getCustomLayoutUpdate());

        $this->generateLayoutXml()->generateLayoutBlocks();

        if ($category->getPageLayout()) {
            $this->getLayout()->helper('page/layout')
                ->applyTemplate($category->getPageLayout());
        }

        if ($root = $this->getLayout()->getBlock('root')) {
            $root->addBodyClass('categorypath-'.$category->getUrlPath())
                ->addBodyClass('category-'.$category->getUrlKey());
        }

        $this->_initLayoutMessages('catalog/session');
        $this->_initLayoutMessages('checkout/session');

        /* START ===== Pete T additional code. Need to put this in override!! */
        if($category->getLevel()==2){
            $category->setDisplayMode('PAGE');
        }
        /* END ======= */

        $this->renderLayout();

    }
    elseif (!$this->getResponse()->isRedirect()) {
        $this->_forward('noRoute');
    }
}

protected function _getRealModuleName()
{
    return "LHM_CategoryLanding";
}
}

这是我第一次尝试重载控制器，所以我什至不确定我是否做得正确。我想做的最后一件事就是向核心添加代码......

提前致谢。

Answer 1

尝试引用此： http:// prattski.com/2010/06/24/magento-overriding-core-files-blocks-models-resources-controllers/

Answer 2

当我使控制器过载时，我不会直接使它们过载，这在过去对我来说一直是个问题。所以你的 config.xml 是正确的。

controller/Catalog/CategoryController.php

<?php

// No need for an include/require - it will only break when Compilation is enabled.

class LHM_CategoryLanding_Catalog_CategoryController extends Mage_Core_Controller_Front_Action
{
// Continue as normal

原始控制器没有被替换，只是被取代。如果需要 view 以外的操作，路由器将不会在您的类中找到它，也不会在它的祖先中找到它，并且默认为仍可访问的 Mage_Catalog_CategoryController 。

Answer 3

我认为，您的问题是LHM_CategoryLanding_Catalog。它可能应该是 LHM_CategoryLanding ，您的控制器文件夹就在其中。

您试图告诉它使用哪个模块，因此该模块是 LHM_CategoryLanding 而不是 LHM_CategoryLanding_Catalog。