Next/Prev Navigation object/collection filtering problem

The CMS Questions
1

Hi there, I’m totally at a loss with the following problem and hope there’s a simple solution that I’m just not seeing.

I have a project section on a website with category filtering via url, that works fine. When using filters the collection $projekte is filtered properly via the controller as I can see via var_dump($projekte);

Unfiltered:

object(Kirby\Cms\Pages)#275 (5) { [0]=> string(23) "projekte/test-gymnasium" [1]=> string(25) "projekte/testfantasiedach" [2]=> string(35) "projekte/testenhausener-fischfabrik" [3]=> string(26) "projekte/test-dachdeckerei" [4]=> string(28) "projekte/testdachschneiderei" }

Filtered example:

object(Kirby\Cms\Pages)#274 (3) { [0]=> string(25) "projekte/testfantasiedach" [1]=> string(35) "projekte/testenhausener-fischfabrik" [2]=> string(28) "projekte/testdachschneiderei" }

So far so good. When entering the detail page for the project, the filtered object stays the same in order to be able to navigate through the pages inside it. I use the following code to find out if there is a prevoius entry and generate a link or span if there isn’t:

<?php if ($projekte->find($curProjekt)->hasPrev()) { ?>
    <a href="<?= $site->url() ?>/projekte/<?= $urlKat ?>/<?= $projekte->find($curProjekt)->prev()->slug() ?>/">←<span> previous Project</span></a>
<?php } else { ?>
    <span>←no previous Project</span>
<?php } ?>

But the behaviour is not as expected, it behaves as if ->find() is accesssing the unfiltered object instead of the filtered one. I expected it to find only the filtered pages since it applied directly to the filtered object. Is it for some reason acessing the initial object or the site pages object? I’m confused.

2

The problem is not find() (although I don’t understand why you are not using $page here), but that you have to pass the filtered collection to hasPrev(), hasNext(), prev() etc.

1 Like
3

Thanks, I’m looking into it. I’m not using $page because I am using routing and a filtered selection of pages and I expected that not to work with the usual $page object. But I’m happy to learn otherwise :slight_smile:

4

Many thanks for pointing me in the right direction. Instead of $page I am using the current project $curProjekt as pointer, so this works:

<?php if ($prev = $curProjekt->prev($projekte)): ?>
    <a href="<?= $site->url() ?>/projekte/<?= $urlKat ?>/<?= $prev->slug() ?>/">← prev project </a>
<?php else: ?>
    <span>← no prev project</span>
<?php endif ?>