Magento – Best Way of Adding Product to Wishlist

You can write an observer listen to the post_dispatch event

'controller_action_postdispatch_wishlist_index_cart'

and change the response to a redirect to the wishlist.

So create a new module/extension and add the following to your config.xml:

<global>
    ...
    <events>
        ...
        <controller_action_postdispatch_wishlist_index_cart>
            <observers>
                <yourcompany_yourmodule>
                    <type>singleton</type>
                    <class>YourCompany_YourModule_Model_Observer</class>
                    <method>controllerActionPostdispatchWishlistIndexCart</method>
                </yourcompany_yourmodule>
            </observers>
        </controller_action_postdispatch_wishlist_index_cart>
    </events>
</global>

Then in your Observer.php add the following method:

public function controllerActionPostdispatchWishlistIndexCart()
{
    Mage::app()->getFrontController()->getResponse()->setRedirect(Mage::app()->getRequest()->getServer('HTTP_REFERER'));
}

That's it. Every time you will try to add something from your wishlist to your cart you will be redirected back to wishlist.

You have 2 options here.
Option 1.
Edit all cart and cart item templates and remove the wishlist column.
For this you need to edit:

• checkout/cart.phtml
• checkout/cart/item/default.phtml
• downloadable/checkout/cart/item/default.phtml

Option 2
Override the Mage_Wishlist_Helper_Data::isAllowInCart method and make it return false always.
For this second option you need a new module. Let's call it Easylife_Wishlist. Create these files:

app/etc/modules/Easylife_Wishlist.xml - the declaration file:

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

app/code/local/Easylife/Wishlist/etc/config.xml - the configuration file

<?xml version="1.0"?>
<config>
    <modules>
        <Easylife_Wishlist>
            <version>1.0.0</version>
        </Easylife_Wishlist>
    </modules>
    <global>
        <helpers>
            <wishlist>
                <rewrite>
                    <data>Easylife_Wishlist_Helper_Data</data> <!-- tell magento to use your own helper instead of the default one -->
                </rewrite>
            </wishlist>
        </helpers>
    </global>
</config>

app/code/local/Easylife/Wishlist/Helper/Data.php - your new helper

<?php 
class Easylife_Wishlist_Helper_Data extends Mage_Wishlist_Helper_Data 
{
    public function isAllowInCart()
    {
        return false;
    }
}

Clear the cache, disable compilation if enabled and you are done.