[wp-trac] [WordPress Trac] #25538: WP_Query: OR relation breaks orderby meta_value

[WordPress Trac]

#25538: WP_Query: OR relation breaks orderby meta_value
--------------------------+-----------------------------
 Reporter:  darrengrant   |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:
 Severity:  major         |   Keywords:
--------------------------+-----------------------------
 When using the WP_Query class either for a custom query or the main query
 using an OR relation in a meta_query will prevent orderby meta_value
 working as it should. For instance:

 {{{
 $args = array(
    'post_type' => 'post',
    'meta_key' => 'order',
    'meta_value' => 1,
    'meta_compare' => '>=',
    'orderby' => 'meta_value'
  );
 }}}

 will render in a different order to:

 {{{
 $args = array(
    'post_type' => 'post',
    'meta_key' => 'order',
    'meta_value' => 1,
    'meta_compare' => '>=',
    'orderby' => 'meta_value',
    'meta_query' => array(
        'relation' => 'OR',
        array(
            'key' => 'order',
            'compare' => '>=',
            'value' => 1
        )
    )
  );
 }}}

 Even though the two queries are the same. Replacing the relation with AND
 will give the correct ordering however. Obviously this isn't a useful
 real-world example, but highlights the issue best.

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Ticket URL: <http://core.trac.wordpress.org/ticket/25538>
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