This are my current parameters for WP_Query:
array(5) { ["posts_per_page"]=> int(6) ["orderby"]=> array(2) { ["uss_product_price"]=> string(3) "ASC" ["uss_product_weight"]=> string(4) "DESC" } ["meta_query"]=> array(3) { ["relation"]=> string(3) "AND" ["sortprimary_clause"]=> array(2) { ["key"]=> string(17) "uss_product_price" ["compare"]=> string(6) "EXISTS" } ["sortsecondary_clause"]=> array(2) { ["key"]=> string(18) "uss_product_weight" ["compare"]=> string(6) "EXISTS" } } ["paged"]=> string(1) "1" ["post_type"]=> string(7) "product" } This new kind of orderby was introduced in WordPress 4.0 and 4.2: https://make.wordpress.org/core/2014/08/29/a-more-powerful-order-by-in-wordpress-4-0/ https://make.wordpress.org/core/2015/03/30/query-improvements-in-wp-4-2-orderby-and-meta_query/
The query basically works however the products are ordered by the string value of uss_product_price and uss_product_weight. Previously this problem was solved by giving meta_value_num instead of meta_value in WP_Query: https://codex.wordpress.org/Class_Reference/WP_Query#Order_.26_Orderby_Parameters
I want the result to be ordered by the numeric value of uss_product_price (first) and uss_product_weight (second). How can I tell the query to use the numeric value while still using the complexity of multiple orderby parameters?