Layered Navigation with configurable product

[Scqualo71]

Hello,

I think is not correct the layered navigation with configurable product in Magento 2. Configurable products should be visible only if they have associated some SIMPLE PRODUCT that respects ALL applied filters. The same problem is with advantage research.

Preconditions

1. Magento CE ver. 2.1.7

Steps to reproduce

1. Insert this products:
   

Expected result

1. Only configurable product A is visible

Actual result

1. Both configurable product A and B are visible. So if the customer clicks on the product B does not find the desired combination.
2. you can see this example in:
   http://ur2.chelegno.com/scatole-confezione/scatole-automontanti.html

[RomanKrut]

@Scqualo71 Hi, thank you for report this issue , internal ticket was created - MAGETWO-70107.

[magento-engcom-team]

@Scqualo71, thank you for your report.
The issue is already fixed in develop branch, 2.2.0

[ThomVeldpaus]

Hello,

It seems Magento 1 has te same issue, does anyone know if there is relatable ticket for that?

[ikis1520]

Hi I reviewed the code this is a possible solution :

Modified the file vendor/magento/module-catalog-search/Model/Layer/Filter/Attribute.php

       if ($isAttributeFilterable && (!$this->isOptionReducesResults($count, $productSize) || $count === 0)) {
        return;
    }

to:

    if ($isAttributeFilterable && $count === 0)) {
        return;
    }

I hope this help you.

[mbattistini]

Magento ver. 2.4.5-p1, PHP 8.1
I keep having the same problem, maybe it has to do with stock.
After selection, products displayed with selected attributes are displayed even if "out of stock".