save a selection from an ajaxified field

cocq

10/17/22, 3:09 PM

I successfully update a field from ajax. Its declaration is the following :

$form['field_unite_de_recherche']['widget']['#ajax'] = array(
  'callback' => 'ajax_equipes_from_unites_callback',
  'event' => 'change',
  'method' => 'html',
  'wrapper' => 'edit-field-equipe-membre2-wrapper',
);

This ajaxified field is declared as in the following :

$form['field_equipe_membre2'] = [
  '#type' => 'select',
  '#title' => 'Equipe(s) membre rattachée(s) à '.$title,
  '#options' => $options,
];

My question is: how to know and save the selected value in this ajaxified field by the user?

I tried to add another ajax declaration in this ajaxified field as in the following :

$form['field_equipe_membre2'] = [
  '#type' => 'select',
  '#title' => 'Equipe(s) membre rattachée(s) à '.$title,
  '#options' => $options,
  '#ajax' => array(
    'callback' => 'ajax_save_choice_callback',
    'event' => 'change',
    'method' => 'html',
    'wrapper' => 'edit-field-equipe-membre2-wrapper',
  )
];

But the callback function is not fired. Is there a limitation of ajax function in a form?

I red a number of times that I can use the $form_sate, for instance as in the following (from Ajax call with Submit loses submitted form data)

$value = $form_state->getValue('field_equipe_membre2');
$testArray = array('field_equipe_membre2' => $value);
$form_state->setStorage($testArray);

But the callback is not fired.

Can I have some advices?

0 + 4

forms

ajax

Jaypan

10/17/22, 4:25 PM

Usually these issues happen when you've added form elements in your ajax callback. They won't have ajax applied to them. You need to add form elements in the form definition.

cocq

10/18/22, 7:09 AM

May be I was not enough clear. The "field_equipe_membre2" in in the form definition, with no any options values, and these values are well filled by "ajax_equipes_from_unites_callback" function. But I did not find how to retrieve the selected value in "field_equipe_membre2" field when user click on "submit" button of th form.

Beau

11/16/22, 4:01 PM

First off, I don't think that `setStorage()` is the method that you want. You probably should be using `setValue()`, instead. How are you rendering this form? Also, this is for Drupal 7, right? You should mark the question with the Drupal version number.

cocq

12/30/22, 7:49 AM

You are right concerning "setValue" as a better functino than "setStorage" (one of my numerous tests...). This is for Drupal 9.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: save a selection from an ajaxified field

TH: บันทึกการเลือกจากฟิลด์ ajaxified

RO: salvați o selecție dintr-un câmp ajaxificat

RU: сохранить выбор из ajaxified поля

VI: lưu một lựa chọn từ một trường ajaxified

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