get children of selected pages in admin

[webhoes]

Hello,

I have 2 fields in on a template.

field 1 is country and field 2 is state.

states are children of a country.

 

Now if I select one ore more countries I would like to see the children of the selected countries in the field state (select multiple).

I tried something in ready.php but I can't get this to work.

$wire->addHookAfter('InputfieldPage::getSelectablePages', function($event) {
    if($event->object->hasField == 'state') {
        $event->return = $event->pages->find('template=country')->children;
    }
});

 

It this the way to do it, or is another way better?

I don't mind to have to save the page first before I can see the children of the selected countries.

[Ivan Gretsky]

Not answering you question directly, but to provide alternatives to solve the problem. There is a commercial module by kongondo that does just that. And another open source and free one by justb3a that does something similar.

[Robin S]

2 hours ago, webhoes said:

I don't mind to have to save the page first before I can see the children of the selected countries.

You can do it without having to save the page using the (undocumented) core dependent selects feature.

There are some requirements for it to work. More info:

 

[webhoes]

@Robin S, thanks. Your code works excellent but it won't save the selected states. After I save all the options (states) are gone, also the selected ones.

I have selected Select Multiple as input field type.

 

If I want to use something like this: 

return $page->country->children();

Where would I put that?

 

[webhoes]

Ahh... figured it out. Had some code in ready.php that prevented the initial show. ?