Relationship between two Custom Post Types – all child records show up

Replies: 0

I am building a website for a travelling company where I need a parent child relationship between a Trip and Packaged tours offered by the company to visit that place. Trip is parent and Packaged tours are children to it and this is an 1-many relationship.

To achieve this I created two Custom Post Types (Trip and Package-Tour). In Trip I added Package-Tour as a Relationship field.

Then I added two Package Tours (PT-A and PT-B) and two Trips (Trip-A and Trip-B). I associated PT-A with Trip-A and PT-B with Trip-B.

The problem is both PT-A and PT-B are visible in both trip pages while I was expecting only the associated one to come up.

In single.php I have:

<?php
    $packages = get_posts(array(
        'post_type' => 'package_tour',
        'meta_query' => array(
            'key' => 'available_tour_packages',
            'value' => '"' . get_the_ID() . '"',
            'compare' => 'LIKE'
        )
    ));

    if($packages) {
      foreach($packages as $package) {
         echo "<h1>" . $package->post_title . "</h1>";
         echo "<p>" . $package->trip_itinerary . "</p>";
         echo "<p>" . $package->booking_procedure . "</p>";
      }
    }
?>

I tried by using 'compare' => 'IN' but it did not change any behaviour.

echo-ing get_the_ID gives me correct ID of Trip post but in the database I saw that values saved under post_parent Package-Tour posts are all 0 (not the ID of Trip post), which mean that current relationship is probably not the true parent-child relationship – the way I thought.

I have started WordPress very recently and don’t have much experience of it yet. What is the correct way of doing this?

• This topic was modified 11 minutes ago by  subrataemfluence. Reason: Added additional info about query