Add back the check for hierarchical post types, instead of just relying on page-attributes

README.md

@@ -36,6 +36,8 @@ Yep. When you register the post type, include the `page-attributes` feature in t
 
 `'supports' => array( 'title', 'editor', 'page-attributes' ),`
 
+Alternatively, when you register the post type, set `hierarchical` to `true` - hierarchical post types natively order by menu order.
+
 You can also take advantage of the `simple_page_ordering_is_sortable` filter, which passes the result of the default check and the post type name, to override default behavior.
 
 ### I want my non-hierarchical post type to be sortable. Help!
@@ -60,11 +62,11 @@ Where 5 is the number of items to batch on each request (the default is 50). Not
 
 This feature is already built into WordPress natively, but a bit tucked away. If you pull down the "Screen Options" tab up top (on the list of post objects) there's a field where you can specify the number of items to show per page. I decided it was not a very good practice to duplicate this.
 
-### How can I exclude certain custom post types?
+### How can I modify sortable post types?
 
-Custom post types can be excluded by using the `simple_page_ordering_is_sortable` filter.
+Post types can be included or excluded by using the `simple_page_ordering_is_sortable` filter.
 
-For example, with `excluded_post_type` as the custom post type ID, add the following snippet in the theme function file or custom plugin:
+For example, to exclude the `excluded_post_type` custom post type, add the following snippet in the theme function file or custom plugin:
 
 ```
 add_filter( 'simple_page_ordering_is_sortable', function( $sortable, $post_type ) {
@@ -75,6 +77,17 @@ add_filter( 'simple_page_ordering_is_sortable', function( $sortable, $post_type
 }, 10, 2 );
 ```
 
+To include the `include_post_type` custom post type, add the following snippet in the theme function file or custom plugin:
+
+```
+add_filter( 'simple_page_ordering_is_sortable', function( $sortable, $post_type ) {
+    if ( 'include_post_type' === $post_type ) {
+        return true;
+    }
+    return $sortable;
+}, 10, 2 );
+```
+
 ### Can I use REST to order posts?
 
 Yes. The plugin registers the REST endpoint `simple-page-ordering/v1/page_ordering`.

readme.txt

@@ -46,6 +46,8 @@ Yep. When you register the post type, include the `page-attributes` feature in t
 
 `'supports' => array( 'title', 'editor', 'page-attributes' ),`
 
+Alternatively, when you register the post type, set `hierarchical` to `true` - hierarchical post types natively order by menu order.
+
 You can also take advantage of the `simple_page_ordering_is_sortable` filter, which passes the result of the default check and the post type name, to override default behavior.
 
 = I want my non-hierarchical post type to be sortable. Help! =
@@ -70,11 +72,11 @@ Where 5 is the number of items to batch on each request (the default is 50). Not
 
 This feature is already built into WordPress natively, but a bit tucked away. If you pull down the "Screen Options" tab up top (on the list of post objects) there's a field where you can specify the number of items to show per page. I decided it was not a very good practice to duplicate this.
 
-= How can I exclude certain custom post types? =
+= How can I modify sortable post types? =
 
-Custom post types can be excluded by using the `simple_page_ordering_is_sortable` filter.
+Post types can be included or excluded by using the `simple_page_ordering_is_sortable` filter.
 
-For example, with `excluded_post_type` as the custom post type ID, add the following snippet in the theme function file or custom plugin:
+For example, to exclude the `excluded_post_type` custom post type, add the following snippet in the theme function file or custom plugin:
 
 `
 add_filter( 'simple_page_ordering_is_sortable', function( $sortable, $post_type ) {
@@ -85,6 +87,17 @@ add_filter( 'simple_page_ordering_is_sortable', function( $sortable, $post_type
 }, 10, 2 );
 `
 
+To include the `include_post_type` custom post type, add the following snippet in the theme function file or custom plugin:
+
+```
+add_filter( 'simple_page_ordering_is_sortable', function( $sortable, $post_type ) {
+	if ( 'include_post_type' === $post_type ) {
+		return true;
+	}
+	return $sortable;
+}, 10, 2 );
+```
+
 = Can I use REST to order posts? =
 
 Yes. The plugin registers the REST endpoint `simple-page-ordering/v1/page_ordering`.

simple-page-ordering.php

@@ -73,7 +73,17 @@ public static function load_textdomain() {
 		 * @return boolean
 		 */
 		private static function is_post_type_sortable( $post_type = 'post' ) {
-			return apply_filters( 'simple_page_ordering_is_sortable', post_type_supports( $post_type, 'page-attributes' ), $post_type );
+			$sortable = ( post_type_supports( $post_type, 'page-attributes' ) || is_post_type_hierarchical( $post_type ) );
+
+			/**
+			 * Change default ordering support for a post type.
+			 *
+			 * @since 2.2.4
+			 *
+			 * @param boolean $sortable Whether this post type is sortable or not.
+			 * @param string  $post_type The post type being checked.
+			 */
+			return apply_filters( 'simple_page_ordering_is_sortable', $sortable, $post_type );
 		}
 
 		/**
@@ -416,8 +426,7 @@ public static function page_ordering( $post_id, $previd, $nextid, $start, $exclu
 		public static function sort_by_order_link( $views ) {
 			$class        = ( get_query_var( 'orderby' ) === 'menu_order title' ) ? 'current' : '';
 			$query_string = remove_query_arg( array( 'orderby', 'order' ) );
-			$sortable     = self::is_post_type_sortable( get_post_type() );
-			if ( $sortable ) {
+			if ( ! is_post_type_hierarchical( get_post_type() ) ) {
 				$query_string = add_query_arg( 'orderby', 'menu_order title', $query_string );
 				$query_string = add_query_arg( 'order', 'asc', $query_string );
 			}