Order posts by taxonomy

taxonomy-filter.php

<?php
/**
 * Show all posts based on taxonomy meta key.
 *
 * @return WP_Query $courses New WP_Query containing courses.
 */
function display_posts_taxonomy_order() {

		$term_args = array(
			'taxonomy'     => 'discipline',
			'meta_compare' => 'NUMERIC',
			'meta_key'     => 'course_order', // custom meta field added to custom taxonomy.
			'orderby'      => 'meta_value_num',
			'order'        => 'ASC',
		);

		$course_terms = get_terms( $term_args );

		foreach ($course_terms as $course_term) :

			$term_slug = $course_term->slug;
			$the_query = new WP_Query( array(
						'post_type' => 'post',
            'orderby'   => 'menu_order title',
            'order'     => 'DESC',
						'tax_query' => array(
							array(
								'taxonomy' => 'discipline',
								'field'    => 'slug',
								'terms'    => $term_slug,
							),
						),
					));

			if( $the_querys->have_posts() ) :
				while ( $the_query->have_posts() ) : $the_query->the_post();

          echo '<article class="hentry" id="post-' . get_the_ID() . '">';
            echo '<h3>' . get_the_title() . '</h3>';
            echo '<div class="post-description">' . wpautop( get_the_content() ) . '</div>';
          echo '</article>';

				endwhile;
			endif;
			wp_reset_postdata();

		endforeach;

	endif;

}