Placement of 'image.php' and how to use Gallery addon

I made gallery pages that are actually just links in Perch going to the same album.php file with different slugs, and it works well---except that it doesn't work for two of the three albums---the <img> elements that render fine when one of the album slugs is passed to the album.php file simply don't exist when one of the other two slugs is used.

I know the URL identifiers for those two albums are correct because the function perch_gallery_album_field(perch_get('s'), 'albumTitle') does successfully show the album titles for all the albums, including the ones where there are no image elements.

This is the relevant part of my album.php file:

  <div class="module-flex_row callout-heading">
    <h2><?php perch_gallery_album_field(perch_get('s'), 'albumTitle'); ?></h2>
  </div>

  <div id="main-slider-parent">
    <?php
      if(perch_get('s')) {
        perch_gallery_album_images(perch_get('s'), array(
          'template' => 'gallery_carousel.html'
        ));
      }
    ?>
  </div>

And this is the template gallery_carousel.html:

<perch:before><div class="flexslider">
    <ul class="slides"></perch:before>
        <li class="slides album">
            <perch:if exists="carousel"><img src="<perch:gallery id="carousel" />" alt="<perch:gallery id="imageAlt" />" height="<perch:gallery id="carousel-h" />" width="<perch:gallery id="carousel-w" /> "/></perch:if>
        </li>
    <perch:after></ul>
</div></perch:after>

I wonder if for some reason the Gallery app didn't make the carousel versions of the images for the other two albums, which I defined in my version of image.html:

<perch:gallery id="image" type="image" key="carousel"  width="683" crop="true" />
<perch:gallery id="image" type="image" key="main"  width="464" />
<perch:gallery id="desc" type="textarea" label="Description" size="s" textile="true" editor="markitup" />

Maybe this is an issue with my dev environment's server settings, so here's the diagnostic too:

    Perch: 2.8.31, PHP: 5.6.23, MySQL: mysqlnd 5.0.11-dev - 20120503 - $Id: 76b08b24596e12d4553bd41fc93cccd5bac2fe7a $, with PDO
    Server OS: WINNT, apache2handler
    Installed apps: content (2.8.31), assets (2.8.31), categories (2.8.31), perch_blog (5.0), perch_events (1.9.3), perch_forms (1.8.3), perch_gallery (2.8.6), perch_backup (1.2)
    App runtimes: <?php $apps_list = array( 'content', 'categories', 'perch_events', 'perch_forms', 'perch_gallery', 'perch_blog', );
    PERCH_LOGINPATH: /perch
    PERCH_PATH: C:\Users\Webmaster-Lobby\Websites\xampp\htdocs\Sites\lakehouse1\perch
    PERCH_CORE: C:\Users\Webmaster-Lobby\Websites\xampp\htdocs\Sites\lakehouse1\perch\core
    PERCH_RESFILEPATH: C:\Users\Webmaster-Lobby\Websites\xampp\htdocs\Sites\lakehouse1\perch\resources
    Image manipulation: GD
    PHP limits: Max upload 2M, Max POST 8M, Memory: 128M, Total max file upload: 2M
    F1: 2edba60ed1f613d6dd804feb202456a2
    Resource folder writeable: Yes
    HTTP_HOST: dev1.lakehouse
    DOCUMENT_ROOT: C:/Users/Webmaster-Lobby/Websites/xampp/htdocs/Sites/lakehouse1
    REQUEST_URI: /perch/core/settings/diagnostics/
    SCRIPT_NAME: /perch/core/settings/diagnostics/index.php

The most obvious difference is that the one that works only has 11 images in the album, while the two that don't work have 58 and 42 images.

I wonder if some server problems are capping the number of images being output, but I don't even understand it enough to know if that's a very sensible guess.

The working album is position 3 in the album list in the Album Options. The others are 1 and 2, but I think they both erroneously might have been at position 2 before I just corrected it.... but still after ensuring that they all have different position values, only the one works.

I just made a new gallery with 21 images -- half the images from one of the albums that won't render.

I made a page reference in the dashboard to pass its identifier in the URL to the album.php file, and it works!

So, it looks like this has to do with the number of images.

Drew McLellan said:

Do the images upload successfully?

Yes.

Drew McLellan said:

Do you get any errors logged?

No. I tested by making a master album with 288 images. I uploaded the images in batches, and every time I uploaded a group of images I checked the error.log file located at xampp\apache\logs\ in my environment, and nothing new was added to the file during the uploading.

I will probably split the albums into smaller groups, since massive carousels are probably not a great design idea anyways.

Edit: I marked the first reply to my original post in this thread as the solution, since I verified that using URL slugs (in hrefs, etc) is the right way to use the Gallery addon.

I've discovered why the image tags were empty for the larger albums. It actually doesn't seem to have anything to do with the number of images in the albums.

My custom template gallery_carousel.html is dependent on an image type carousel defined in my version of image.html. I didn't save these templates in perch/templates/gallery until after I had uploaded the first two albums.

Now, I've deleted those two albums and re-created them, and the image tags now render for them when output from my template. So, presumably the new image type defined in image.html didn't get created for the albums that were defined before I made my version of that template.