Category Map with more than one category

Kirby 2 Solved ✅
1

Hi there,

I’m trying to use a category map as texnixe wrote several times in the forum (1, 2)

My setup is a bit different though: I’m fetching News and Projects from different pages in different categories via a controller (every news item or project can have multiple categories attached to them. This is just one of the six categories):

if($page->uid() == 'strategy') {

$projects = $pages->find('projects')->children()->visible()->filterBy('categories', 'cat_strategy', ',');
$news = $pages->find('news')->children()->visible()->filterBy('categories', 'cat_strategy', ',');
$posts = new Pages(array($projects, $news));

This works, all the items in a specific category get displayed, it doesn’t matter if it’s a news item or a project.

Then I tried to use the code bit from texnixe to show the categories and their blueprint “translation”:

<?php
  $categoryMap = c::get('categoryMap');
  echo $categoryMap[trim($page->category())];
?>

with something similar in my config:

c::set('categoryMap', array(
   'news' => 'News Article',
   'architecture' => 'Architecture',
   'photography' => 'Photography',
));

But apparently I can’t use an array for trimming. So I tried putting the categories used on an item in an array, use array_intersect, implode, but that’s just me poking around in the dark. I already learned a lot since starting with kirby a little over a year ago, but I still don’t get arrays and I don’t know how to take the array in the config and subtract the categories from the news item or project and show the translation.

Where I want to use it would be on the projects overview page where I tried something like this:

<?php $projects = page('projects')->children()->visible(); ?>
<?php foreach($projects as $project): ?>

<p class="showcase-tags">
                <?php 
                    $categoryMap = c::get('categoryMap');
                    $categories = array($project->categories()->value());
                    $categoriesFinal = array_intersect($categoryMap, $categories);
                    dump($categoryMap);
                    dump($categories);
                    dump($categoriesFinal);
                    echo implode(' | ', $categoriesFinal);
                ?>
</p>

This is the poking around in the dark part, I’m afraid.

I really hope somebody can help me here!

Cheers,
Daniel

2

I don’t get what you’re asking for, but using trim() icw associative arrays as you suggested should just work.

What is it you’re trying to accomplish exactly?

3

Thanks for your reply!

What I try to accomplish: There is an overview page of all the recent projects for example. I got to the point where everything I wanted gets displayed on that page: Project name, image and a short excerpt. Now I want to display the associated categories with the names from the labels as in the blueprint (so instead of ‘news’ I want to display ‘News Article’ from the example above). My problem is, that a project doesn’t just have one category (which worked with the code snippet by texnixe) but multiple categories and I didn’t find a solution for arrays, since I don’t really understand them (never have).

Did I just miss something?

4 
$category = "news,architecture"; // This is the value of your $page->category() field
$categories = [
  'news' => 'News Article',
   'architecture' => 'Architecture',
   'photography' => 'Photography',
];

foreach(explode(",", $category) as $cat) {
    echo $categories[$cat] . "<br>";
}

// Output:
// News Article
// Architecture

Assuming you’re using a , as separator, the above code should output the correct values from your categoryMap array.

1 Like
5

That’s it, thank you so much!

<?php 
  $categoryMap = c::get('categoryMap');
  $categories = $project->categories()->value();
                
  foreach(explode(", ", $categories) as $cat) {
    echo $categoryMap[$cat] . "  |  ";
   }
?>

I thought about using a foreach loop but didn’t exactly know where to put it (or what to use exactly).
Again, thank you!

6

Hi, it’s me again… if you could help me again, @bvdputte, I would really appreciate it

I have that piece of code in a snippet, like in the starter kit (showcase), and I use that snippet on the home page and on the projects page.
It works fine on home, where I set a limit

 (<?php snippet('showcase', ['limit' => 4]) ?>)

but doesn’t work on the projects page as long as I don’t set a limit there as well. I just get a “Undefined index:” for the line

echo $categoryMap[$cat] . "  |  ";

and that’s it. Which I absolutely don’t understand, since I fetch the projects in the snippet like that:

$projects = page('projects')->children()->visible();

which shouldn’t make any difference, if it’s on the home or projects page, right?
Can you help me with that?

7

Can you post the code of the snippet and how you call it in the prjects template please?

8

Sure, thanks for taking a look at it!

Snippet:

<?php

$projects = page('projects')->children()->visible();

if(isset($limit)) $projects = $projects->limit($limit);

?>
<h2><?= page('projects')->title()->kirbytext() ?></h2>
<div class="showcase">

  <?php foreach($projects as $project): ?>

    <div class="showcase-item">
        <div class="showcase-link">
            <?php if($image = $project->images()->sortBy('sort', 'asc')->first()): $thumb = $image->crop(600, 600); ?>
              <img src="<?= $thumb->url() ?>" alt="Thumbnail for <?= $project->title()->html() ?>" class="showcase-image" />
            <?php endif ?>
        </div>
        <div class="showcase-textbox">
            <div class="showcase-text">
                <p class="showcase-tags">
                    <?php 
                        $categoryMap = c::get('categoryMap');
                        $categories = $project->categories()->value();
                        
                        foreach(explode(", ", $categories) as $cat) {
                            echo $categoryMap[$cat] . "  |  ";
                        }
                   ?>
                </p>
                <h2><?= $project->title()->html() ?></h2>
                <p class="showcase-excerpt"><?= excerpt($project->intro(), 200) ?></p>
            </div>
             <a href="<?= $project->url() ?>">
            <div class="showcase-details">
               
                    <p>Details</p>
            </div></a>
        </div>
    </div>

  <?php endforeach ?>
</div>

And the projects template:


<?php snippet('header') ?>
<?php snippet('heroimages') ?>

  <main class="main" role="main">

    <header class="wrap distance">
      
      <div class="header-intro">
      <h1><?= ($page->alternatetitle()->isEmpty()) ? $page->title()->html() : $page->alternatetitle()->html() ?></h1>
      <div class="header-text">
        <?= $page->intro()->kirbytext() ?>
      </div>
       <?php if($page->more() != ""): 
            echo $page->more()->kirbytext();
       endif; ?>
      </div>
    </header>
      <section class="intro">
      <div class="wrap">
          <?= $page->text()->kirbytext() ?>
      </div>
    </section>
      
    <div class="wrap wide">    
      <?php snippet('showcase') ?>
    </div>

  </main>
<?php snippet('footer') ?>
9

I suppose you are trying to access an index of the $categoryMap array which has no elements, or you’re trying to use a value as index in the array which hasn’t been (yet?) defined in $categoryMap.

Please try:

foreach(explode(", ", $categories) as $cat) {
    if (array_key_exists($cat, $categoryMap)) {
        echo $categoryMap[$cat] . "  |  ";
    }
}
1 Like
10

Hey @bvdputte,

that is working like a charm, awesome!

But I don’t really get the connection - what has the limitation of displayed items to do with the categoryMap?

The categoryMap has all the same items as the checkbox values. Array_key_exists checks the $categoryMap for values coming from those checkboxes, right? Could it be that one item does not have a category, therefore it has no key to check in the categoryMap and throws an error?

Thank you again, you definitely made my day :slight_smile:

11

Yes, exactly :slight_smile:

1 Like