The reason you can’t figure out how to do it is because it’s not possible, at least not without resorting to SQL. Try adding the following to your theme’s functions.php file:
1 2 3 4 5 6 7 8 9 10 | add_filter('posts_where','yoursite_posts_where',10,2); function yoursite_posts_where($where,$query) { global $wpdb; $new_where = " TRIM(IFNULL({$wpdb->postmeta}.meta_value,''))<>'' "; if (empty($where)) $where = $new_where; else $where = "{$where} AND {$new_where}"; return $where; } |
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