Custom post type – order field

2 comments

1. When declaring your custom post type using the register_post_type function, you have to add ‘page-attributes’ to the support field, like in the following example:

   register_post_type('myposttype', array(
       'supports' => array('title', 'editor', 'page-attributes'),
       'hierarchical' => false
   ));
   

   You’ll need to add any other supported meta boxes as well to the ‘supports’ field, see https://developer.wordpress.org/reference/functions/register_post_type/ for more information about the register_post_type fields.

   Also as far as I know there isn’t any built in way to prevent two of the same order, this is because you can create sub-ordering based on heirarchy (so one group of children pages can have a different ordering than another)

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2. In addition to @Dave-Hunt’s response, you can also add a filter, such as the following, to define a custom order – in this case, alphabetical by title. (Code thanks to Mark Leong’s blog post.) Remove the is_admin() check, if you want you custom order_by on the front-end as well.

   function set_custom_post_types_admin_order($wp_query) {
     if (is_admin()) {
   
       // Get the post type from the query
       $post_type = $wp_query->query['post_type'];
   
       if ( $post_type == 'POST_TYPE') {
   
         // 'orderby' value can be any column name
         $wp_query->set('orderby', 'title');
   
         // 'order' value can be ASC or DESC
         $wp_query->set('order', 'ASC');
       }
     }
   }
   add_action('pre_get_posts', 'set_custom_post_types_admin_order');
   

   Update

   For pre-save validation, see this answer: https://wordpress.stackexchange.com/a/40095/4645
   where your options are discussed. Basically, it comes down to custom jQuery, as WordPress doesn’t have any pre-save hooks.

   Also (duplicating my previous comment here for future reference), here’s how to expose the ‘menu order’ field in the admin, so it’s user-editable, as it is for pages: Adding ‘menu order’ column to custom post type admin screen

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