Nav menu nog showing up as taxonomy

Hello all,

I am trying to use my nav menu as a taxonomy. What I basically want to do is display all the pages from a nav_menu as an a “category” or “archive” in the loop. To illustrate:

if ($query->is_main_query()) {
    $query->set('post_type', 'page');
    $query->set('tax_query', array('nav_menu' => 'primary'));
  }

However, this seems to return no results.

When I list all the taxonomies by using get_taxonomies() there is a “nav_menu” key in the returned array.

array(5) { ["category"]=> string(8) "category" ["post_tag"]=> string(8) "post_tag" ["nav_menu"]=> string(8) "nav_menu" ["link_category"]=> string(13) "link_category" ["post_format"]=> string(11) "post_format" }

But when I grab all the terms associated to a page that I put in the “primary” nav menu I get empty results:

wp_get_post_terms($post->ID); -> array(0) {}

Are nav_menus supported taxonomies?