Try to echo 2 relationships fields…

Hello, can you help me?

I have three taxonomies in my blog (days, activities, hotels). These three taxonomies behave as follows:

– One day can have several activities in different hotels
– An activity can be held at a hotel on different days
– A hotel can arrange different activities on different days

What I want is to print a listing as follows:

Day # 1
activity
hotel
schedule
—-
activity
hotel
schedule
—
…

Day # 2
activity
hotel
schedule
—
…

I have this code to register de connections:

p2p_register_connection_type( array(
  'name' => 'hoteles_to_actividades', //hotels_to_activities
  'from' => 'hotel', //hotel
  'to' => 'actividad' //activity
) );

p2p_register_connection_type( array(
  'name' => 'dias_to_actividades', //days_to_activities
  'from' => 'dia', //day
  'to' => 'actividad', //activity
  'fields' => array(
    'horario' => array( //schedule
      'title' => 'Horario', //Schedule
      'type' => 'text',
    ),
  )
) );

And this other code to try to print the listing…

query_posts('post_type=dia&posts_per_page=-1&order=DESC'); //day
if ( have_posts() ) :
  while ( have_posts() ) : the_post();
    the_title();

    $connected = new WP_Query( array(
      'connected_type' => 'dias_to_actividades', //days_to_activities
      'connected_items' => get_queried_object(),
      'nopaging' => true,
      'connected_orderby' => 'title',
      'connected_order' => 'desc'
    ) );
    if ( $connected->have_posts() ) :
      while ( $connected->have_posts() ) : $connected->the_post();
        echo $post->post_title . '<br />';
      endwhile;
      wp_reset_postdata();
    endif;
  endwhile;
endif;
wp_reset_query();

My result with this code is almost nothing…

Day #1
Day #2
Day #3
…

Can anybody help me?
Thanks in advance !!

https://wordpress.org/plugins/posts-to-posts/