Query for tags within a structure field

Kirby 3 Solved ✅
1

Hi all,

I have a structure field with ingredients and I want it to propose already used terms. I tried it with using tags and querying for them (which worked outside the structure field) — however this does not work.

Could someone point me to my error?

Thanks!

          zutaten:
            label: Zutaten
            type: structure
            columns:
              zutat_anzahl:
                width: 1/3
              zutat:
                width: 2/3
            fields:
              zutat_anzahl:
                label: Anzahl
                type: text
              zutat:
                label: Zutat
                type: tags
                max: 1
                required: true
                options:
                  type: query
                  query: page.siblings.pluck("zutaten", ",", true)
2

That doesn’t work because you try to pluck from the structure field, but that won’t return anything useful.

See documentation here how to query from a structure field: Tags | Kirby CMS

1 Like
3

Ok, this makes sense. It works like this for a single page:

options:
  type: query
  query: page.zutaten.toStructure
  text: "{{ item.zutat }}"
  value: "{{ item.zutat }}"

But if I want to query also its siblings query:

query: page.siblings.zutaten.toStructure

I get an Error “get_class(): Argument #1 ($object) must be of type object, null given”

4

Right, then you need a custom page method that returns all values from all siblings; you cannot achieve this using the query language.

This is not valid, because you can only query a field from a single page, not a collection.

5

Could you tell me how do achieve this? I’m honestly lost here…

6

This should help, unless you also need help with the code inside the method as well. But basically, you would loop through the pages and return an array of options.

7

I took me a while and I came up with this:

/site/plugins/zutatenmethod/index.php:

<?php

function usedIngredients($page)
{
    $usedIngredients = [];
    foreach ($page->siblings() as $sibling) {
        $ingredients = $sibling->zutaten()->toStructure();
        foreach ($ingredients as $ingredient) {
            if (!in_array($ingredient->zutat(), $usedIngredients)) {
                $usedIngredients[] = $ingredient->zutat();
            }
        }
    }
    return array_map(function($ingredient) {
        return ['value' => $ingredient, 'text' => $ingredient];
    }, $usedIngredients);
}

Query in the blueprint:

type: query
query: usedIngredients($page)

/site/config/config.php:

<?php
return [
    'debug' => true,
    'plugins' => [
      'zutatenmethod'
    ]
];

But I get the following error in the panel:

get_class(): Argument #1 ($object) must be of type object, null given in file: /usr/local/var/www/kirby/kirby/src/Option/OptionsQuery.php line: 158

8

You have to create a page method like in the link I posted above, not a simple function.

This is superfluous.

9

It works! Thank you so much (also for you patience).