Boolean product attribute are not visible on Magento 2

Question

I am working on a Magento 2 website. I found that the boolean product attributes are not visible on the extra specifications tab on the product page. After a while, I ended up on the official github of Magento with this issue: https://github.com/magento/magento2/pull/8623

Based on that, it should have been fixed. In my case, it hasn't. So, I tried to apply the fix myself.

I went to

vendor\magento\magento-catalog\block\product\view\attributes.php

and changed the line 89 from:

if (is_string($value) && strlen($value)) {

to

if ($value instanceof Phrase || (is_string($value) && strlen($value))) {

Then I ran an upgrade on console: ./bin/magento setup:upgrade

But I still have the problem. Anyone was able to solve it?

P.S. Magento CE 2.1.6

Answer 1

I have posted my finding in https://github.com/magento/magento2/pull/8623. I am repeating the comment here as well.

In Related to community version 2.1.6 I think real reason for this kind of behaviour is lies in the logic of fetching attributes. vendor/magento/module-eav/Model/ResourceModel/ReadHandler.php

foreach ($connection->fetchAll($unionSelect) as $attributeValue) {
                if (isset($attributesMap[$attributeValue['attribute_id']])) {
                    $entityData[$attributesMap[$attributeValue['attribute_id']]] = $attributeValue['value'];
                } else {
                    $this->getLogger()->warning(
                        "Attempt to load value of nonexistent EAV attribute '{$attributeValue['attribute_id']}'
                        for entity type '$entityType'."
                    );
                }
            }

I think $attributesMap array should be the one that need to be loop. If the result from all $unionSelect doesn't have any value for the $attributesMap element, then it should fetch the default value for the attribute.