$products = Product::whereIn('category_id', $thisCategoryArr);
foreach($attributesWhichPass as $attr)
{
$products = $products->whereHas('specs', function (Builder $query)
use ($attr) {
$query->where('filter_attributes_id', $attr);
});
}
$products = $products->paginate(16, ['*'], 'page', $pageNumber);