function date_select_validate

Validation function for date selector.

When used as a Views widget, the validation step always gets triggered, even with no form submission. Before form submission $element['#value'] contains a string, after submission it contains an array.

File

core/modules/date/date.elements.inc, line 727

Date forms and form themes and validation.

Code

function date_select_validate($element, &$form_state) {
  if (date_hidden_element($element)) {
    return;
  }

  if (is_string($element['#value'])) {
    return;
  }

  $input_exists = NULL;
  $input = backdrop_array_get_nested_value($form_state['values'], $element['#parents'], $input_exists);
  backdrop_alter('date_select_pre_validate', $element, $form_state, $input);

  $label = !empty($element['#date_title']) ? $element['#date_title'] : (!empty($element['#title']) ? $element['#title'] : '');
  if (isset($input['ampm'])) {
    if ($input['ampm'] == 'pm' && $input['hour'] < 12) {
      $input['hour'] += 12;
    }
    elseif ($input['ampm'] == 'am' && $input['hour'] == 12) {
      $input['hour'] -= 12;
    }
  }
  unset($input['ampm']);
  $date = date_select_input_date($element, $input);

  // If the field has errors, display them.
  $error_field = implode('][', $element['#parents']);
  $entered = array_values(array_filter($input));
  if (empty($date) || !empty($date->errors)) {
    // The input created a date but it has errors.
    if (is_object($date) && !empty($date->errors)) {
      if (count($date->errors) === 1) {
        $error_list = ' ' . reset($date->errors);
      }
      else {
        $error_list = theme('item_list', array('items' => $date->errors));
      }
      $message = t('The value input for field %field is invalid:', array('%field' => $label)) . $error_list;
      form_set_error($error_field, $message);
      return;
    }
    // Nothing was entered but the date is required.
    elseif (empty($entered) && $element['#required']) {
      $message = t('A valid date is required for %title.', array('%title' => $label));
      form_set_error($error_field, $message);
      return;
    }
    // Something was input but it wasn't enough to create a valid date.
    elseif (!empty($entered)) {
      $message = t('The value input for field %field is invalid.', array('%field' => $label));
      form_set_error($error_field, $message);
      return;
    }
  }
  $value = date_is_date($date) ? $date->format(DATE_FORMAT_DATETIME) : NULL;
  form_set_value($element, $value, $form_state);
}