How to put orderby on a custom field in query_posts

Question

I have the following query in my query_posts and want to add order by to this. Order by will be on another custom field and sorted by desc order.

Here is my existing query.

//show all active posts for this taxonomy
 query_posts( array(
   'post_type' => APP_POST_TYPE,
   'post_status' => 'publish',
   APP_CUSTOM_TAX => $term->slug,
   'ignore_sticky_posts' => 1,
   'orderby' => 'date', //Instead of this, i want to use custom field like 'votes','date'
   'meta_query' => array(
       'relation' => 'OR',
             array(
                'key' => 'offer_type',
                'compare' => 'NOT EXISTS',
              ),
              array(
                'key' => 'offer_type',
                'value' => 'top',
                'compare' => '!=',
              )
      ))
);

Please suggest.

Answer 1

Have a look at the Codex page - you use 'orderby' => 'meta_value'. Specifically, scroll down a bit and read 'orderby' with multiple 'meta_key's