if ( isset( $value['type'] ) && 'order_item_meta' === $value['type'] ) {

                        if ( is_array( $value['meta_key'] ) ) {
                            $query['where'] .= " ( order_item_meta_{$key}.meta_key   IN ('" . implode( "','", $value['meta_key'] ) . "')";
                        } else {