Configurable Product – How to Redirect Simple Products

configurable-productsimple-product

How to redirect a simple product's page to the parent configurable product page?

Best Answer

the code below should work only if the simple products are assigned to only one configurable product.
by default, magento allows you to add a simple product to as many configurable products you need.

Let's create a module and call it StackExchange_Redirect.
You will need the following files.

app/etc/modules/StackExchange_Redirect.xml - the declaration file

<?xml version="1.0"?>
<config>
    <modules>
        <StackExchange_Redirect>
            <codePool>local</codePool>
            <active>true</active>
            <depends>
                <Mage_Catalog />
            </depends>
        </StackExchange_Redirect>
    </modules>
</config>

app/code/local/StackExchange/Redirect/etc/config.xml - the module configuration file where you declare an observer for the product view page

<?xml version="1.0"?>
<config>
    <modules>
        <StackExchange_Redirect>
            <version>1.0.0</version>
        </StackExchange_Redirect>
    </modules>
    <global>
        <models>
            <stackexchange_redirect>
                <class>StackExchange_Redirect_Model</class>
            </stackexchange_redirect>
        </models>
    </global>
    <frontend>
        <events>
            <controller_action_predispatch_catalog_product_view>
                <observers>
                    <stackexchange_redirect>
                        <class>stackexchange_redirect/observer</class>
                        <method>redirectToConfigurable</method>
                    </stackexchange_redirect>
                </observers>
            </controller_action_predispatch_catalog_product_view>
        </events>
    </frontend>
</config>

app/code/local/StackExchange/Redirect/Model/Observer.php - the observer that should redirect to the configurable product page.

<?php 
class StackExchange_Redirect_Model_Observer
{
    public function redirectToConfigurable($observer)
    {
        $id = Mage::app()->getRequest()->getParam('id');
        $configurableParentIds = Mage::getResourceSingleton('catalog/product_type_configurable')
            ->getParentIdsByChild($id);
        if (isset($configurableParentIds[0])) {
            $mainProduct = Mage::getModel('catalog/product')
                ->setStoreId(Mage::app()->getStore()->getId())
                ->load($configurableParentIds[0]);
            Mage::app()->getResponse()->setRedirect($mainProduct->getProductUrl(), 301);
            Mage::app()->getResponse()->sendResponse();
            exit;
        }
        return $this;
    }
}

when you are done, clear the cache.

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