function list_allowed_values_setting_validate

Element validate callback; check that the entered values are valid.

File

modules/field/modules/list/list.module, line 160

Code

function list_allowed_values_setting_validate($element, &$form_state) {
    $field = $element['#field'];
    $has_data = $element['#field_has_data'];
    $field_type = $field['type'];
    $generate_keys = ($field_type == 'list_integer' || $field_type == 'list_float') && !$has_data;
    $values = list_extract_allowed_values($element['#value'], $field['type'], $generate_keys);
    if (!is_array($values)) {
        form_error($element, t('Allowed values list: invalid input.'));
    }
    else {
        // Check that keys are valid for the field type.
        foreach ($values as $key => $value) {
            if ($field_type == 'list_integer' && !preg_match('/^-?\\d+$/', $key)) {
                form_error($element, t('Allowed values list: keys must be integers.'));
                break;
            }
            if ($field_type == 'list_float' && !is_numeric($key)) {
                form_error($element, t('Allowed values list: each key must be a valid integer or decimal.'));
                break;
            }
            elseif ($field_type == 'list_text' && drupal_strlen($key) > 255) {
                form_error($element, t('Allowed values list: each key must be a string at most 255 characters long.'));
                break;
            }
        }
        // Prevent removing values currently in use.
        if ($has_data) {
            $lost_keys = array_diff(array_keys($field['settings']['allowed_values']), array_keys($values));
            if (_list_values_in_use($field, $lost_keys)) {
                form_error($element, t('Allowed values list: some values are being removed while currently in use.'));
            }
        }
        form_set_value($element, $values, $form_state);
    }
}