[solved] Disable field at update only

Hello,

I need to make a form with some field editable for the creation (first time), but no more editable for update ('readonly'=>'readonly').

What is the best practice?

Thanks

i found the solution :

Code:

---

  'config' => array
        (
        ...
                'onload_callback'      => array
                (
                        array('tl_rdv_group', 'onLoad')
                ),
        ...

---

Code:

---

        'fields' => array
        (
                'start_date' => array
                (
                        ...
                        'eval'                    => array( 'disabled'=> true, ...)
                ),

---

Code:

---




function onLoad( $dca ) {
...
if ( $_GET['s2e'] )
    {
    $GLOBALS['TL_DCA']['tl_rdv_group']['fields']['start_date']['eval']['disabled'] = false;
    $GLOBALS['TL_DCA']['tl_rdv_group']['fields']['start_date']['eval']['datepicker'] = $this->getDatePickerString();
    }
...
 }

---