Query Custom Post Type by Taxonomy

Question

I've created a query working fine pulling posts from a specific taxonomy—but before I had only 7 taxonomies that were permanent, now I have sub taxonomies under that main taxonomy and they will be dynamic.

Any ideas of how I might be able to write this but have a for-each loop going through this query for any taxonomy that is a child of the main taxonomy (in this example the parent taxonomy is 'Cameras')

So again: I have 7 parent taxonomies ('Cameras' is one) and each one has a dynamic amount of sub taxonomies, i'm trying to create a for each loop that will allow me to do the following without writing the query for each specific sub-taxonomy.

Thanks

<h2>Cameras</h2>
<ul>
<?  $args = array(
                                'post_type'=> 'rental_gear',
                                'type'    => 'cameras',
                                'order'    => 'ASC',
                                'posts_per_page' => '-1'
                                );              

                            $the_query = new WP_Query( $args );
                            if($the_query->have_posts() ) : while ( $the_query->have_posts() ) : $the_query->the_post(); 

                            ?>
                            <li class="equip-li"><a href="<? the_permalink(); ?>">&rsaquo; <? the_title(); ?></a></li>  
                            <?php endwhile; endif; wp_reset_postdata(); ?>

Answer 1

Use get_terms() with child_of (accepts numerical ID of parent term) argument to retrieve child terms and then loop through them and on each iteration use current term in the loop.

Code example (not tested):

$child_terms = get_terms( array( 'child_of' => $cameras_term_id ) );

foreach( $child_terms as $term ) {

    $args = array(
        'post_type'=> 'rental_gear',
        'type'    => $term->term_slug,
        'order'    => 'ASC',
        'posts_per_page' => '-1'
    );              

    $the_query = new WP_Query( $args );
    if($the_query->have_posts() ) : while ( $the_query->have_posts() ) : $the_query->the_post(); 
        ?><li class="equip-li"><a href="<?php the_permalink(); ?>">&rsaquo; <?php the_title(); ?></a></li>  
    <?php endwhile; endif; wp_reset_postdata(); ?>

}