Ticket #25545: Invalidate_post_cache_when_a_user_is_removed.patch

wordpressdotorg/wp-includes/ms-functions.php

@@ -258 +258 @@
 
         if ( $reassign != '' ) {
                 $reassign = (int) $reassign;
+
+                // get posts by user to invalidate cache
+                $posts = get_posts( array( 'author' => $user_id, 'numberposts' => -1 ) );
+                foreach( $posts as $post ) {
+                        clean_post_cache( $post );
+                }
+
                 $wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET post_author = %d WHERE post_author = %d", $reassign, $user_id) );
                 $wpdb->query( $wpdb->prepare("UPDATE $wpdb->links SET link_owner = %d WHERE link_owner = %d", $reassign, $user_id) );
         }