Loop Through CPTs + Group by Custom Taxonomy Terms

page-cpts-grouped-by-taxonomy.php

<?php
/**
*
* Loop through some custom post types and group them by taxonomy term, 
* outputting the taxonomy term names before the set of posts
*
*/

// get all of the custom taxonomy terms
$taxonomy = 'my_custom_taxonomy';
$args = array(
	'orderby' => 'id',
	'order' => 'ASC',
);
$taxonomy_terms = get_terms($taxonomy, $args);

// if there are some taxonomy terms, loop through each one and get the posts in that term
if($taxonomy_terms) {
	foreach($taxonomy_terms as $taxonomy_term) {

		$args = array(
			'post_type' => 'my_cpt',
			"$taxonomy" => $taxonomy_term->slug,
			'post_status' => 'publish',
			'posts_per_page' => -1,
		);

		$query = new WP_Query( $args );

		if ( $query->have_posts() ) : ?>

      // output the taxonomy name for the current term
			<h2><?php echo $taxonomy_term->name; ?></h2>

			<div class="cpts-wrap">

      // loop over the posts 
			<?php while ( $query->have_posts() ) : $query->the_post(); ?>
				<h3><?php the_title(); ?></h3>
			<?php endwhile; ?>

			</div><!-- .cpts-wrap -->

		<?php wp_reset_postdata(); // so nothin' weird happens to other loops
		endif;

	}
}
?>