I’ve created a custom post type and a custom taxonomy. I’m able to see the list of terms as a radio field on the custom post type using Piklist, but when I select one and save it, it does not seem to actually associate the cpt with the term. I’ve looked over my code dozens of times and tried several variations. I’m hoping I’m missing something obvious.

Any help would be welcome.

Here’s my plugin code (note that it’s not a theme).

Taxonomy definition:

add_filter('piklist_taxonomies', function( $taxonomies ){

  $taxonomies[] = array(
    'post_type' => 'sms_band'
    ,'name' => 'sms_shade'
    ,'show_admin_column' => true
    ,'hide_meta_box' => false
    ,'configuration' => array(
      'hierarchical' => true
      ,'labels' => piklist('taxonomy_labels', 'Shade')
      ,'show_ui' => true
      ,'query_var' => false
    )
  );
  return $taxonomies;

});

Code in use to add two default terms

// Add 'Dark' and 'Light' default terms
add_action('admin_init', function(){

  $taxonomy = "sms_shade";

  $term = "Dark Background [Light Text]"; 
  $slug = "dark"; 
  if ( !term_exists( $term, $taxonomy ) ){
    wp_insert_term( $term, $taxonomy, array( 'slug' => $slug ) );
  }
  $term = "Light Background [Dark Text]"; 
  $slug = "light"; 
  if ( !term_exists( $term, $taxonomy ) ){
    wp_insert_term( $term, $taxonomy, array( 'slug' => $slug ) );
  }

});

/parts/meta-boxes/band_shade.php

piklist('field', array(
  'type' => 'radio'
  ,'field' => 'band_shade'
  ,'scope' => 'taxonomy'
  ,'label' => 'Shades'
  ,'choices' => piklist(
  get_terms('sms_shade', array(
    'hide_empty' => false
  ))
  ,array(
    'term_id'
    ,'name'
  ))
));