Ticket #42785: 42785.diff

src/wp-includes/class-wp-post-type.php

@@ -377 +377 @@
 
                 $has_edit_link = ! empty( $args['_edit_link'] );
 
+                $show_in_rest_default = false;
+
+                if ( ( isset( $args['public'] ) && ( true === $args['public'] ) ) || ( ( isset( $args['publicly_queryable'] ) && ( true === $args['publicly_queryable'] ) ) ) ) {
+                        if ( ! isset( $args['show_in_rest'] ) ) {
+                                $show_in_rest_default = true;
+                        }
+                }
+
                 // Args prefixed with an underscore are reserved for internal use.
                 $defaults = array(
                         'labels'                => array(),
@@ -402 +410 @@
                         'query_var'             => true,
                         'can_export'            => true,
                         'delete_with_user'      => null,
-                        'show_in_rest'          => false,
+                        'show_in_rest'          => $show_in_rest_default,
                         'rest_base'             => false,
                         'rest_controller_class' => false,
                         '_builtin'              => false,