过滤自定义帖子类型中的分类

I’m working on a Movie Database based on WordPress.

I’ve 2 main Custom Post Type, Movie and Director, with relative entry. In Movie, the director is called by a custom taxonomy and automatically linked to the relative Custom Post Type page with photos, bios, etc…

In the Director page, I need to recall the Movie related to this director.

<?php
$custom_terms = get_terms('director');
foreach($custom_terms as $custom_term) {
wp_reset_query();
$args = array('post_type' => 'movie',
'tax_query' => array(
    array(
        'taxonomy' => 'director',
        'field' => 'slug',
        'terms' => $custom_term->slug,
    ),
),
 );
 $loop = new WP_Query($args);
 if($loop->have_posts()) {
    echo '<h2 class="terms-title">'.$custom_term->name.'</h2>';
    echo '<ul class="post-list">';
    while($loop->have_posts()) : $loop->the_post();
        echo '<li><a href="'.get_permalink().'"     title="'.get_the_title().'" target="_blank">'.get_the_title().'</a>    </li>';
endwhile;
echo "</ul>";
   }
  }
?>

I’ve write this code but actually get all director terms and listing movies for all directors.