Shows the related content on a WordPress site using Relations post type

show-post-relations-relations-post-type

function tan_show_related_content( $postid, $post_type ) {
    global $wp_query, $post;

    // Related IDs for this view ?
    $ids = rpt_get_object_relation( $postid, $post_type );
    if( $ids == false || empty($ids) )
        return false;

    $items_query = new WP_Query( array(
        'post__in'			=> $ids,
        'post_type' 		=> $post_type,
        'post_status' 		=> 'publish',
        'showposts' 	 	=> 1,
    ) );

/*
    <ul class="related-school profile">
        <li><strong>Highschool Name: </strong></li>
        <li><strong>Highschool City: </strong></li>
        <li><strong>Highschool State: </strong></li>
    </ul>
*/

    if ( !$items_query->have_posts()  ) {
        echo '<p class="no-result">'.__('No items actually for this custom type.', 'relations-post-types').'</p>';
    } else {
        echo '<ul class="relations-list">' . "\n";

        while ($items_query->have_posts()) : $items_query->the_post();
            ?>
            <li><a href="<?php the_permalink() ?>" title="<?php echo esc_attr(get_the_title() ? get_the_title() : get_the_ID()); ?>"><?php if ( get_the_title() ) the_title(); else the_ID(); ?></a></li>
            <?php
        endwhile;

        echo '</ul>' . "\n";
    }
    wp_reset_postdata();

}

// show in the post
tan_show_related_content( $post->ID, 'content_type' );