Ticket #11235: 11235.post.php.patch

src/wp-includes/post.php

@@ -5741 +5741 @@
                 if ( '' == get_the_guid($post->ID) )
                         $wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post->ID ) ), array( 'ID' => $post->ID ) );
 
+                if( is_post_type_hierarchical( $post->post_type ) ) {
+                        $child_posts = get_posts( array( 'meta_key' => '_wp_post_parent_fallback', 'meta_value' => $post->ID, 'post_type' => $post->post_type ) );
+                        if( 0 < count( $child_posts ) ) {
+                                array_map( 'wp_update_post', array_map( '__restore_post_parent', $child_posts ) );
+                        }
+                }
+
                 /**
                  * Fires when a post's status is transitioned from private to published.
                  *
@@ -5750 +5757 @@
                  * @param int $post_id Post ID.
                  */
                 do_action('private_to_published', $post->ID);
+        } elseif( 'publish' !== $new_status && 'publish' === $old_status && is_post_type_hierarchical( $post->post_type ) ) {
+                $child_posts = get_posts( array( 'post_parent' => $post->ID, 'post_status' => 'any', 'post_type' => $post->post_type ) );
+                if( 0 < count( $child_posts ) ) {
+                        array_map( 'wp_update_post', array_map( '__unset_post_parent', $child_posts ) );
+                }
         }
 
         // If published posts changed clear the lastpostmodified cache.
@@ -5771 +5783 @@
 }
 
 /**
+ * Function to set post parent to none.
+ *
+ * @param WP_Post $post    Post object.
+ *
+ * @return WP_Post $post    Modified post object.
+ */
+function __unset_post_parent( $post ) {
+        update_post_meta( $post->ID, '_wp_post_parent_fallback', $post->post_parent );
+        $post->post_parent = 0;
+
+        return apply_filters( 'wp_unset_post_parent', $post );
+}
+
+/**
+ * Function to reset post parent to prev.
+ *
+ * @param WP_Post $post    Post object.
+ *
+ * @return WP_Post $post    Modified post object.
+ */
+function __restore_post_parent( $post ) {
+        $post->post_parent = get_post_meta( $post->ID, '_wp_post_parent_fallback', true );
+        delete_post_meta( $post->ID, '_wp_post_parent_fallback' );
+
+        return apply_filters( 'wp_restore_post_parent', $post );
+}
+
+/**
  * Hook used to schedule publication for a post marked for the future.
  *
  * The $post properties used and must exist are 'ID' and 'post_date_gmt'.