Ticket #36515: query.diff

src/wp-includes/query.php

@@ -2745 +2745 @@
                         $where .= " AND $wpdb->posts.post_name = '" . $q['attachment'] . "'";
                 } elseif ( is_array( $q['post_name__in'] ) && ! empty( $q['post_name__in'] ) ) {
                         $q['post_name__in'] = array_map( 'sanitize_title_for_query', $q['post_name__in'] );
-                        $where .= " AND $wpdb->posts.post_name IN ('" . implode( "' ,'", $q['post_name__in'] ) . "')";
+                        $post_name__in = "'".implode( "' ,'", $q['post_name__in'] )."'";
+                        $where .= " AND $wpdb->posts.post_name IN ($post_name__in)";
                 }
 
                 // If an attachment is requested by number, let it supersede any post number.
@@ -2963 +2964 @@
                         $orderby = "FIELD( {$wpdb->posts}.ID, $post__in )";
                 } elseif ( $q['orderby'] == 'post_parent__in' && ! empty( $post_parent__in ) ) {
                         $orderby = "FIELD( {$wpdb->posts}.post_parent, $post_parent__in )";
+                } elseif ( $q['orderby'] == 'post_name__in' && ! empty( $post_name__in ) ) {
+                        $orderby = "FIELD( {$wpdb->posts}.post_name, $post_name__in )";
                 } else {
                         $orderby_array = array();
                         if ( is_array( $q['orderby'] ) ) {