I have a custom attribute called m2_price, which is the Metre Squared price of a piece of carpet.
I've enabled it to be filterable with results in the layered navigation and this all works fine.
However, the prices are stored EXCLUDING tax, so the filter is generated based on these prices. Is there any way I can make the filter then add Tax on to the m2_price just how it works with the normal product price?
I've tried searching for this and I've been unable to find anything which even hints to a solution.
Best Answer
There's an issue with
app/Mage/Catalog/Model/Resource/Layer/Filter/Attribute.php
Swap out your class with the following and it problem should be solved.
visit:-http://islamic-posters.aceph.me/post/21851233473/magento-you-cannot-define-a-correlation-name