added commerce products attributes

Closes #3441649

entityreference_filter.views.inc

@@ -41,6 +41,10 @@ function entityreference_filter_views_data_alter(array &$data) {
         if ($field_name === 'product_id') {
           $target_entity_type = 'commerce_product';
         }
+        // Commerce product attributes.
+        if ($field_name === 'attribute_value_id' || (mb_substr($field_name, -10) === '_target_id' && $field_info['filter']['field_name'] === 'attributes')) {
+          $target_entity_type = 'commerce_product_attribute_value';
+        }
       }
       // Other entityreference fields.
       elseif (!empty($field_info['filter']['field_name']) && !empty($field_info['filter']['entity_type']) && mb_substr($field_name, -10) === '_target_id') {