Ticket #5361: 569_show_on_front.diff

wp-includes/post.php

@@ -504 +504 @@
         $parent_data = array( 'post_parent' => $post->post_parent );
         $parent_where = array( 'post_parent' => $postid );
 
+        /*
+         * if the page is defined in option page_on_front or post_for_posts, 
+         * adjust the corresponding options
+         */
+        if ('page' == $post->post_type){
+                        
+                if ($postid == get_option('page_on_front')){
+                        update_option('show_on_front', 'posts');
+                        delete_option('page_on_front');
+                }
+                if ($postid == get_option('page_for_posts')){
+                        delete_option('page_for_posts');
+                }
+        }
+
         if ( 'page' == $post->post_type )
                 $wpdb->update( $wpdb->posts, $parent_data, $parent_where + array( 'post_type' => 'page' ) );