Ticket #20875: 20875-example-usage.diff

src/wp-includes/post.php

@@ -6029 +6029 @@
  */
 function wp_queue_posts_for_term_meta_lazyload( $posts ) {
         $post_type_taxonomies = $term_ids = array();
+        $cache_keys = array();
         foreach ( $posts as $post ) {
                 if ( ! ( $post instanceof WP_Post ) ) {
                         continue;
@@ -6039 +6040 @@
                 }
 
                 foreach ( $post_type_taxonomies[ $post->post_type ] as $taxonomy ) {
-                        // Term cache should already be primed by `update_post_term_cache()`.
-                        $terms = get_object_term_cache( $post->ID, $taxonomy );
-                        if ( false !== $terms ) {
-                                foreach ( $terms as $term ) {
-                                        if ( ! isset( $term_ids[ $term->term_id ] ) ) {
-                                                $term_ids[] = $term->term_id;
-                                        }
-                                }
+                        if ( ! isset( $cache_keys[ "{$taxonomy}_relationships" ] ) ) {
+                                $cache_keys[ "{$taxonomy}_relationships" ] = array();
+                        }
+
+                        // Force uniqueness by overwriting key.
+                        $cache_keys[ "{$taxonomy}_relationships" ][ $post->ID ] = $post->ID;
+                }
+        }
+
+        if ( ! $cache_keys ) {
+                return;
+        }
+
+        $cached_values = wp_cache_get_multi( $cache_keys );
+        foreach ( $cached_values as $tax_cache_group => $cached_posts ) {
+                foreach ( $cached_posts as $post_id => $cached_post_term_ids ) {
+                        if ( false === $cached_post_term_ids ) {
+                                continue;
+                        }
+
+                        foreach ( $cached_post_term_ids as $term_id ) {
+                                $term_ids[ $term_id ] = $term_id;
                         }
                 }
         }