function file_managed_file_validate in Drupal 7

An #element_validate callback for the managed_file element.

1 string reference to 'file_managed_file_validate'

file_element_info in modules/file/file.module

Implements hook_element_info().

File

modules/file/file.module, line 603

Defines a "managed_file" Form API field and a "file" field for Field module.

Code

function file_managed_file_validate(&$element, &$form_state) {

  // If referencing an existing file, only allow if there are existing
  // references. This prevents unmanaged files from being deleted if this
  // item were to be deleted.
  $clicked_button = end($form_state['triggering_element']['#parents']);
  if ($clicked_button != 'remove_button' && !empty($element['fid']['#value'])) {
    if ($file = file_load($element['fid']['#value'])) {
      if ($file->status == FILE_STATUS_PERMANENT) {
        $references = file_usage_list($file);
        if (empty($references)) {
          form_error($element, t('The file used in the !name field may not be referenced.', array(
            '!name' => $element['#title'],
          )));
        }
      }
    }
    else {
      form_error($element, t('The file referenced by the !name field does not exist.', array(
        '!name' => $element['#title'],
      )));
    }
  }

  // Check required property based on the FID.
  if ($element['#required'] && empty($element['fid']['#value']) && !in_array($clicked_button, array(
    'upload_button',
    'remove_button',
  ))) {
    form_error($element['upload'], t('!name field is required.', array(
      '!name' => $element['#title'],
    )));
  }

  // Consolidate the array value of this field to a single FID.
  if (!$element['#extended']) {
    form_set_value($element, $element['fid']['#value'], $form_state);
  }
}