Don't skip attribute options with a value of 0 from the layered navigation #7578
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Bug Fix
Steps to replicate :
Create an attribute to be used in the Layered Navigation using the source_model
Magento\Eav\Model\Entity\Attribute\Source\Boolean
.When you are on a category page, on the layered navigation you are not given the option to filter by 'No' even though there are products in the category which have this value, you can only filter by 'Yes' because all the attribute options with a falsy value won't be available. 'No' has a falsy value of 0;
## Code Explanation
Make sure that attribute options with a numeric value are not skipped. Empty strings will still be skipped.