Show smallest and largest in a structure list

Kirby 3
1

I would need to retrieve in a structure array the smallest value and the largest value.

Example (to display distances in km):

  • If only one piece of information: 100 km
  • If 2 or more information 100 km to 300 km

Equivalent to the min() or max() function of PHP.

Does something exist in kirby to facilitate the work?

2

No, but why don’t you want to use the native functions? But I’m not sure I understand, do you want to sort all items or pick min and max. Headline says sort, but then I don’t know what you want with min and max

3

Effectively, I want to display the smallest and largest in a list.

4

Could you provide the structure, please?

5

I want to manipulate “race_km”

          listing:
            label: Épreuves
            type: structure
            fields:
              race_title:
                label: Titre
                type: text
                width: 2/4
              race_km:
                label: Distance
                type: number
                placeholder: Kilomètres
                after: km
                step: .1
                width: 1/4

Template

                      <?php foreach($page->listing()->toStructure() as $item): ?>
                          <?php if ($item->race_km()):?>
                                    <?= $item->race_km()->min() ?> km
                          <?php endif ?>
                      <?php endforeach ?>
6 
$raceKmItems = $page->listing()->toStructure()->pluck('race_km', ',', true);
$min         = min($raceKmItems);
$max         = max($raceKmItems);

Alternative:

$items = $page->listing()->toStructure()->sortBy('race_km', 'asc');
$min   = $items->first()?->race_km();
$max   = $items->last()?->race_km();
7

Agreed, that’s really well thought out.

Thanks very much

I don’t think without your help I would never have thought of doing this.

I am trying to think about how to manage the 2 conditions:

  • If a single line
  • If 2 or more lines
8

You can check if $min === $max, then you have only one item.

In the second example, you would have to filter out empty items first.

9

I had just done that.

Surely we can do better

                  <?php 
                      if ($page->listing()->toStructure()->isNotEmpty()):

                      $items = $page->listing()->toStructure()->sortBy('race_km', 'asc');
                      $min   = $items->first()->race_km();
                      $max   = $items->last()->race_km();
                  ?>
                      <?php if ($items->count() >= 2): ?>
                                <?= $min ?> à <?= $max ?> km
                      <?php else: ?>
                        <?= $min ?> km
                      <?php endif ?>
                    
                  <?php endif ?>
10

Even if you have two items, they can be the same?

 <?php if ($page->listing()->toStructure()->isNotEmpty()) {

    $items = $page->listing()->toStructure()->sortBy('race_km', 'asc')->filter(fn($item) => empty($item->race_km()->value()) === false);
    $min   = $items->first()->race_km();
    $max   = $items->last()->race_km();
    echo $min === $max ?  $min . ' km' : $min . ' à ' . $max . ' km';
}
11

You are right. It’s professional code. Thank you so much.

It could indeed happen that the distance is identical, but this is a rare case.

echo $min == $max ?

If I leave === it puts duplicates if identical.
If I put == it does not put the duplicate (strange).

12

However, there is one last error.

If I create a list and there is nothing in the race_km field there is an error page.

Call to a member function race_km() on null

Line : $min = $items_race_km->first()->race_km();

content/

Listing:

- 
  race_title: ""
  race_km: null

An idea ?

13

My original code used the null-safe operator (?->) to prevent this error, see above.

I also suggested filtering out the empty ones first! Assuming you are on PHP 8+.

14

I actually removed the “?” I did not know.

thank you, i will try tomorrow