I'm using Timber (the WordPress plugin implementation of Twig) and the Advanced Custom Fields plugin gallery field. I have a working gallery under a custom post type, so ACF and Timber are working elswhere in the site, but not for a standard page. When I try to add a gallery to a page, all I end up with is empty markup for the img src tag.
I have this in page.php in the template folder:
$context = Timber::get_context();
$page = new TimberPost();
$context['page'] = $page;
if ($photos = $page->get_field('photos')) {
$context['photos'] = $photos;
}
I have this in default.twig in the templates/page/ folder in the theme (html removed for simplicity):
{% if page.photos %}
{% for p in page.photos %}
<img src="{{ p.sizes.gallery|relative }}" alt="{{ p.alt }}" />
{{ p.caption }}
{% endfor %}
{% endif %}
This results in the page source <img src="" alt="">.
If I use {{ dump(photos) }} inside the for p in page.photos statement, it dumps the array of images I have entered in the Gallery field on the backend. So the image array exists and it being output. The relative extension runs for all post types; removing it makes no difference here.
So why is the p.sizes.gallery|relative function not outputting each image's url and caption?
You append the data to the $context['photos'] so I believe you should change your code to check for if photos and iterate as for p in photos