Sitemap & Virtual Pages

The CMS Questions
1

I followed this guide (Virtual pages from image gallery | Kirby CMS) to create a gallery (did not add it via a plugin, only the way described first) and now I have the problem that for the sitemap (created following this guide: Sitemap | Kirby CMS) the virtual pages do not have a lastmod value.
Is it possible to create a lastmod value for virtual pages or is there another way to workaround a possible limitation?

2

You would have to overwrite the modified() method in the GalleryImagePage model. Maybe use file modification date.

3

Even tho this makes sense, I have no idea how to do that. But I was able to just add following code to the sitemap.php and that seemed to work:

            <?php if ($image = $p->image()) : ?>
                <lastmod><?= $image->modified('c', 'date') ?></lastmod>
            <?php else : ?>
                <lastmod><?= $p->modified('c', 'date') ?></lastmod>
            <?php endif ?>
4

This will give you the image modification date for each and every page that has an image. Doesn’t really make sense, does it?

5

That is correct, but in that case all other images are added via a block element and it seems to work. Working means it looks correct. But again as I have no idea how to adjust the code without another hint (or 5) it will have to suffice for now.

            <?php if ($image = $p->template() == 'gallery-image') : ?>
                <lastmod><?= $p->image()->modified('c', 'date') ?></lastmod>
            <?php else : ?>
                <lastmod><?= $p->modified('c', 'date') ?></lastmod>
            <?php endif ?>

I guess a cleaner option could be to check if the template if ‘gallery-image’ and then use this in the sitemap.php