how to update item by using ajax on custom component joomla 4

Question

Dears

My component was a bit old. So I started to do it again on joomla 4. I have been looking for a few days, how to update or create data items by using Ajax in joomla 4. i found a lot of feedback on the Ajax interface J4. But I like to understand and therefore do by myself.

Normally, on FullCalendar, I have an event listener that triggers an Ajax call. Either it creates an object in the database or modifies it.

default.php :

        $.ajax({
        type: "post",
        url: "index.php?option=com_litsupp&task=reservations.update",
        data: 
        {
            id: id,
            arrivee: arrivee,
            depart: depart,
            lit: lit
        },
        cache: false,
        success: function(data){
            alert(data);
            location.reload();
        } 
    });

My reservationsController.php :

class ReservationsController extends FormController
{
    public function update($key = null, $urlVar = null)
    {
        $this->checkToken();
        $result = new stdClass;
        $input = Factory::getApplication()->input;
        $id     = $this->input->getInt('id', 0);
        $arrivee = $this->input->get('arrivee','','string');
        $depart = $this->input->get('depart','','string');
        $lit = $this->input->get('lit',0,'int');
        $r = false;
        //PR: Added the model instantiation
        $model = $this->getModel('Reservations', 'Site');
        if ($id > 0) {
            $r = $model->updateResas(array(
                'id' => $id,
                'arrivee' => $arrivee,
                'depart' => $depart,
                'lit' => $lit
            ));
            $r = true;
        }
        $result->status = $r;
        $result->row = $id;
        echo json_encode($result);
        exit;       
    }
}

and my reservationModel :

    public function updateResas()
{
    $db = $this::getDbo();
    $query = $db->getQuery(true);
    $updateNulls = true;

    // Create an object for the record we are going to update.
    $object = new stdClass();
    
    // Must be a valid primary key value.
    $object->id = $id;
    $object->arrivee = $arrivee;
    $object->depart = $depart;
    $object->lit = $lit;
    
    // Update their details in the users table using id as the primary key.
    // You should provide forth parameter with value TRUE, if you would like to store the NULL values.
    $result = $this::getDbo()->updateObject('#__litsupp_reservations', $object, 'id', $updateNulls);    }

I absolutely do not manage joomla 4. The last update of my component was on version 3.1 of joomla. Version 4 is still sorely lacking in documentation, if any of you can help me understand what I'm doing wrong. That would be great!

Thank you for your help

Answer 1

Dears & dear Irata

I finally changed my way. This is the way of updating that blocked on the model side. Here are the changes if it can help

Default.php

    $.ajax({
        type: "post",
        url: "index.php?option=com_litsupp&task=reservations.update",
        data:
        {
            token : csrf,
            id : id,
            arrivee : arrivee,
            depart : depart,
            lit : lit
        },
        cache: false,
        success: function(){
            location.reload();

reservationsController.php

public function update($key = null, $urlVar = null)
{
    $result = new \stdClass();
    $id     = $this->input->getInt('id', 0);
    $arrivee = $this->input->get('arrivee','','string');
    $depart = $this->input->get('depart','','string');
    $lit = $this->input->get('lit',0,'int');
    $model = $this->getModel('Reservations', 'Site');
    if ($id > 0) {
        $return = $model->updateResas(array(
            'id' => $id,
            'arrivee' => $arrivee,
            'depart' => $depart,
            'lit' => $lit
        ));
    }
    $result->status = $r;
    $result->row = $id;
    echo json_encode($result);
}

reservationsModel :

public function updateResas()
{
    $db = $this->getDbo();
    $query = $db->getQuery(true);
    $query
        ->update($db->quoteName('#__litsupp_reservations'))
        ->set($db->quoteName('arrivee') . ' = "' . $_POST['arrivee'] . '"')
        ->set($db->quoteName('depart') . ' = "' . $_POST['depart'] . '"')
        ->set($db->quoteName('lit') . ' = "' . $_POST['lit'] . '"')
        ->where($db->quoteName('id') . ' = "' . $_POST['id'] . '"');
    $db->setQuery($query);
    $result = $db->execute();
}

Thanks a lot Irata for your help.