I have a form that has a bunch of CCK fields, one of which is a master "request type" field.
The other fields on the form are required depending on the state of the master field.
Example form:
{master field}
{field one} (required always, set by cck form)
{fieldgroup my group for vertical tabs} {
-{field two} (required IF master field == '1')
-{field three} (required IF master field == '1' OR '2')
}
I have been trying to accomplish this using the form validation, at this stage Im trying to make the field required on the fly without even checking the masterfield but I cant make it render as a required field on the form...
function my_module_form_alter(&$form, $form_state, $form_id) {
switch ($form_id)
{
case 'my_node_node_form':
$form['#validate'][] = 'my_module_form_validate';
break;
default:
// nothing
break;
}
}
function my_module_form_validate($form, &$form_state) {
// there are so many versions of the same field, which one do I use?
$form['#field_info']['field_two']['required'] = '1';
$form['group_my_group']['field_two']['#required'] = '1';
$form['group_my_group']['field_two'][0]['#required'] = 'TRUE';
}
When I submit the form all I get is Field One field is required.
When I do a print_r dump on the $form in the validation function, it shows that I am successfully changing the values but its not rendering as required.
How do I make a field required depending on another fields value?
I figured out the key was not to use $form['#validate'][]
but $form['#after_build'][]
, like this
function my_module_form_alter(&$form, $form_state, $form_id) {
switch ($form_id)
{
case 'my_node_node_form':
$form['#after_build'][] = 'my_module_form_after_build';
break;
default:
// nothing
break;
}
}
function my_module_form_after_build($form, &$form_state) {
switch ($form['field_master_field']['#value']['value']) {
case '2':
$form['group_my_group']['field_three'][0]['value']['#required'] = TRUE;
case '1':
$form['group_my_group']['field_two'][0]['value']['#required'] = TRUE;
case '0':
$form['group_my_group']['field_one'][0]['value']['#required'] = TRUE;
break;
}
return $form;
}
Works a treat
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