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I'd like to make a simple "multiple choices per attribute" addon for the layered navigation.

Simply put, I want

/pisarniska-razsvetljava.html?led_color[]=3&led_color[]=4

to work. For this to happen, I need to

  1. convert attribute keys into IDs (e.g. led_color -> ID #2)
  2. alter the product collection load procedure to handle attribute value arrays and not just plain values

Because I can't see any of that happening in Mage/Catalog/CategoryController, where would I go or which class/method would I need to overload?

I found this repo https://github.com/mercator/catalin_seo which does what we want but it's very difficult to make any sense of it as the author overloads a ton of classes. I am hoping for a simpler solution.

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You need to rewrite
app\code\core\Mage\Catalog\Model\Layer\Filter\Item.php
to generate right urls and
app\code\core\Mage\Catalog\Model\Layer\Filter\Attribute.php
plus
app\code\core\Mage\Catalog\Model\Resource\Layer\Filter\Attribute.php to accept multiple values filter.

As well as app\code\core\Mage\Catalog\Block\Layer\State.php to show the selection.

Make sure it will work with the search, as it uses different layer collection.

  • Thanks for the tip, I'll try it Monday morning and get back to you. – Omer Sabic Aug 30 '14 at 12:02
  • I finally got back to this task and yes this was all I needed :) Thank you – Omer Sabic Sep 17 '14 at 14:09
  • @OmerSabic i've got the same problem, i know it's not correct for the forum policy, but can you share your solution? – krybbio Sep 5 '17 at 11:56
  • @krybbio sorry mate, this was 3 years ago at an agency where I do not work any more, so I don't have the source. Just check those classes and overload the correct methods, if you have some PHP experience you'll manage it. – Omer Sabic Sep 5 '17 at 13:48

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