Drupal how to disable a form element in a cck form using form alter
The standard way of altering form elements and setting them disabled does not work with cck fields.
<?php
function my_module_form_alter(&$form, &$form_state, $form_id) {
$form['my_element']['#disabled'] = true;
}
?>The FAPI process handler of the CCK field won't transfer the #disabled attribute to its children elements.
You'll need this snippet to make it work.
<?php
/**
* implementing hook_form_alter
*/
function my_module_form_alter(&$form, &$form_state, $form_id) {
if ($form_id == 'some_node_form') {
$form['#after_build'][] = '_my_module_after_build';
}
}
/**
* Custom after_build callback handler.
*/
function _my_module_after_build($form, &$form_state) {
// Use this one if the field is placed inside a fieldgroup.
_my_module_fix_disabled($form['some_group']['field_some_field']);
//When using a field
//_my_module_fix_disabled($form['field_some_field'];
return $form;
}
/**
* Recursively set the disabled attribute of a CCK field
* and all its dependent FAPI elements.
*/
function _my_module_fix_disabled(&$elements) {
foreach (element_children($elements) as $key) {
if (isset($elements[$key]) && $elements[$key]) {
// Recurse through all children elements.
_my_module_fix_disabled($elements[$key]);
}
}
if (!isset($elements['#attributes'])) {
$elements['#attributes'] = array();
}
$elements['#attributes']['disabled'] = 'disabled';
}
?>EDIT:
Some useful related stuff. Explains why a hook form alter wont work http://drupal.org/node/726282 and how the FAPI handles cck fields.
Comments
Drupal how to disable a form element in a cck form using form alter
First off, thank you for this code. Worked great for disabling.
However, I have my cck fields set to a default value. And when I used this snippet, the default values were erased once I clicked the save button. Is there any lines i could add to this to have it save the default values that I had set in drupal?
Thanks again for your help.
Milan
Drupal how to disable a form element in a cck form using form alter
I believe when a form field is disabled no values are submitted, this is rather a html related issue than a form api/drupal related issue http://stackoverflow.com/questions/1191113/disable-select-form-field-but...
Drupal how to disable a form element in a cck form using form alter
Well that makes sense. Thank you for the response, Dominique!
Drupal how to disable a form element in a cck form using form alter
replace $elements['#attributes']['disabled'] = 'disabled' with this $elements['#attributes']['readonly'] = 'readonly' to save default value.
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