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    collections relations

    With YAML content and the pages field you can easily link information on your site with other sources in Kirby. All examples below are based on the Starterkit.

    In your content files

    Add a new field to any of your content files to which you'd like to add related pages:

    /content/2_notes/20180625_a-night-in-the-forest/note.txt
    Title: A night in the forest
----
Text: Some insightful text for the audience
----
Related:

- notes/across-the-ocean
- notes/in-the-jungle-of-sumatra

    You are free to name the field that contains the related pages however you like, as long as you take care of using the right variable in the template later.

    Add any number of related pages with the YAML syntax. To link pages, store their URI (the URL without your domain) in the content file. Since the URI is unique, Kirby will always be able to find the right page, even if you change its content or its sorting number. You have to be careful, however, if you change the location of a page or its folder name.

    If you don't want to add and edit the entries manually in the content file, make sure to set up the Panel accordingly.

    In your templates

    Accessing those related posts in your templates could look like this:

    /site/templates/note.php
    <?php
$related = $page->related()->toPages();
if ($related->count() > 0):
?>
  <h2>Related</h2>
  <ul>
    <?php foreach($related as $article): ?>
    <li>
      <a href="<?= $article->url() ?>">
        <?= $article->title() ?>
      </a>
    </li>
    <?php endforeach ?>
  </ul>
<?php endif ?>

    We use the field method ->toPages() to convert the YAML list of page ids from the field to a pages collection. After that we can iterate over the pages collection and use the familiar Kirby PHP API.

    In the Panel

    If you use the Panel, you have to add the related field to your blueprint. The pages field offers a great way to select one or more related articles.

    /site/blueprints/pages/note.yml
    related:
    label: Related articles
    type: pages
    query: page.siblings(false)

    We use the query option to display all sibling pages of the current page in the list. By passing false to the $page->siblings() method, we exclude the current page from the list – we don't want the article itself to be a related article. Learn more about our query syntax.

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