did/would this work? :
<?php
$name_of_the_training = get_posts(array(
'post_type' => 'training', //search posttypes of this name
'meta_query' => array(
array(
'key' => 'name_of_the_training', // with a custom field of this name (has to be a relationship field!)
'value' => '"' . get_the_ID() . '"', // look for post that has this ID (matches exaclty "123", not just 123. This prevents a match for "1234")
'compare' => 'LIKE'
)
)
));
if ($name_of_the_training ) {
foreach( $name_of_the_training as $training){
echo "<span>" .get_field('number_of_days', $training->ID). " days</span><br/>";
echo "<span>" .get_field('price', $training->ID). " euros</span><br/>";
}
}
?>
