Commit 3f300231 authored by webchick's avatar webchick

Issue #811542 follow-up by David_Rothstein, thekevinday, attiks, quicksketch:...

Issue #811542 follow-up by David_Rothstein, thekevinday, attiks, quicksketch: Fixed illegal choice errors on radio buttons.
parent a9a89f3f
......@@ -2338,30 +2338,27 @@ function form_type_checkboxes_value($element, $input = FALSE) {
function form_type_radios_value(&$element, $input = FALSE) {
if ($input !== FALSE) {
// There may not be a submitted value for multiple radio buttons, if none of
// the options was checked by default. If there is no submitted input value
// for this element (NULL), _form_builder_handle_input_element()
// automatically attempts to use the #default_value (if set) or an empty
// string (''). However, an empty string would fail validation in
// _form_validate(), in case it is not contained in the list of allowed
// values in #options.
if (!isset($input)) {
// Signify a garbage value to disable the #default_value handling and take
// over NULL as #value.
$element['#has_garbage_value'] = TRUE;
// There was a user submission so validation is a must. If this element is
// #required, then an appropriate error message will be output. While an
// optional #type 'radios' does not necessarily make sense from a user
// interaction perspective, there may be use-cases for that and it is not
// the job of Form API to artificially limit possibilities.
// When there's user input (including NULL), return it as the value.
// However, if NULL is submitted, _form_builder_handle_input_element() will
// apply the default value, and we want that validated against #options
// unless it's empty. (An empty #default_value, such as NULL or FALSE, can
// be used to indicate that no radio button is selected by default.)
if (!isset($input) && !empty($element['#default_value'])) {
$element['#needs_validation'] = TRUE;
// The value stays the same, but the flags above will ensure it is
// processed properly.
return $input;
elseif (isset($element['#default_value'])) {
return $element['#default_value'];
else {
// For default value handling, simply return #default_value. Additionally,
// for a NULL default value, set #has_garbage_value to prevent
// _form_builder_handle_input_element() converting the NULL to an empty
// string, so that code can distinguish between nothing selected and the
// selection of a radio button whose value is an empty string.
$value = isset($element['#default_value']) ? $element['#default_value'] : NULL;
if (!isset($value)) {
$element['#has_garbage_value'] = TRUE;
return $value;
......@@ -196,6 +196,8 @@ function testRequiredCheckboxesRadio() {
// Submit again with required fields set and verify that there are no
// error messages.
......@@ -458,6 +458,12 @@ function form_test_validate_required_form($form, &$form_state) {
'#title' => 'Radios (optional)',
'#options' => $options,
$form['radios_optional_default_value_false'] = array(
'#type' => 'radios',
'#title' => 'Radios (optional, with a default value of FALSE)',
'#options' => $options,
'#default_value' => FALSE,
$form['actions'] = array('#type' => 'actions');
$form['actions']['submit'] = array('#type' => 'submit', '#value' => 'Submit');
return $form;
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