Fetch fields from a selected structure

Kirby 2 Solved ✅
1

I have a structure field in site.yml, and a selection option on a page using the select-a-structure plugin.

How can I fetch the fields of the selected option in the page template?

2

Should be something like

$selectedOption = $page->{$field}(); // replace $field with the name of your select field
$structureField = $site->{$nameOfStructurefield}()->structure(); // replace $nameOfStructurefield with the name of the structure field you queried in the select. field
$optionKey = 'name of the field you use in the selectfield as optionkey';

$selectedField = $structureField->findBy($optionKey, $selectedOption);

dump($selectedField)
3

I get an error: ‘Method name must be a string’

4

where?

Please post complete code indicating in which line the error occurs.

5

Ok, this is the structure field to add ads or banners on site.yml:

ads:
    label: Ads
    type: structure
    entry: >
        {{title}}
    fields:
        title:
            label: Title
            type: text
        code:
            label: Code
            type: textarea

And this is the code to select them on article.yml :

ad:
    label: Select Ad
    type: selectastructure
    structurepage: /
    structurefield: ads
    optionkey: title

and I need to show the code field of the selected ad on the article template.

6

That doesn’t answer my question: Where does the error occur? Please post your template code where the error happens indicating the line where it is thrown.

7

Yes, in the first line:

$adSelected = $page->{$ad}();
8

Well, your field is called ad not $ad, so

$adSelected = $page->ad();

I used variables because you didn’t provide the information of what your fields were called. Was assuming that you know how to call a page field.

9

Yes, it seemed strange to me, but I thought maybe it was another way to do it. I saw that my first message wasn’t clear enough and for this reason I added the rest of the code.

Now, the message doesn’t appear but I still wonder how to fetch the code field.

<?php
    $adSelected = $page->ad()->value();
    $structureField = $site->ads()->structure();
    $optionKey = 'title';

    $selectedField = $structureField->findBy($optionKey, $adSelected);

    echo $selectedField;
?>
10

You can’t echo $selectedField because it is an item from a structurefield, so as if you were looping through a structurefield, you have to call the separate fields within that field:

echo $selectedField->title();
echo $selectedField->code();

If unsure what you have, always do a dump to see what you got:

dump($selectedField)

will show you that it is an object you usually can’t just echo…

You can of course use a variable as a field name, but when using variables, they have to be defined in advance. And in the case of using a variable for fieldnames, the variable must contain a string.

11

Ok. But something is wrong because I get this error:

‘Call to a member function code() on null.’

On line:

echo $selectedField->code();
12

Then $selectedField doesn’t seem to contain anything, which will be the case if the entry doesn’t exist. Are you calling this within a loop? Of course, you should always check if the object exists, so

if($selectedField) {
echo $selectedField->code();
}
13

If I do a dump, as you suggested, I can see the fields:

Structure Object
(
    [0] => Structure Object
        (
            [title] => Field Object
                (
                    [page] => 
                    [key] => title
                    [value] => Amazon Banner
                )

            [code] => Field Object
                (
                    [page] => 
                    [key] => code
                    [value] => Text
                )

        )

    [1] => Structure Object
        (
            [title] => Field Object
                (
                    [page] => 
                    [key] => title
                    [value] => Google Ad
                )

            [code] => Field Object
                (
                    [page] => 
                    [key] => code
                    [value] => Google Ad code
                )

        )

)

I don’t use a loop, I use the code as appears above.

14

Hm, why is your field part of an array? That seems strange… Or where does the [0] key come from?

15

I don’t know, it’s the first time I use this plugin.

16

I edited the dump and you can see the full code.

17

Ok, your dump returns a collection of structure items, which is weird, because findBy only returns a single entry, not the complete structure field. Sure you are dumping the right element here?

I suggest you check your code again.

The solution I offered in my first post above is correct and should work as expected.

18

I’m dumping the structure field, as you suggested before, to check that the fields exist.

19

Ok, I will try again later.

Thank you

20

I wanted you to dump the result of the findBy query, because that didn’t seem to yield any results, hence the call on code() didn’t work.