function views_plugin_display::validate

Make sure the display and all associated handlers are valid.

Return value

Empty array if the display is valid; an array of error strings if it is not.

Overrides views_plugin::validate

File

plugins/views_plugin_display.inc, line 2906

Class

views_plugin_display

The default display plugin handler. Display plugins handle options and basic mechanisms for different output methods.

Code

public function validate() {
  $errors = array();
  // Make sure displays that use fields HAVE fields.
  if ($this->uses_fields()) {
    $fields = FALSE;
    foreach ($this->get_handlers('field') as $field) {
      if (empty($field->options['exclude'])) {
        $fields = TRUE;
      }
    }
    if (!$fields) {
      $errors[] = t('Display "@display" uses fields but there are none defined for it or all are excluded.', array(
        '@display' => $this->display->display_title,
      ));
    }
  }
  if ($this->has_path() && !$this->get_option('path')) {
    $errors[] = t('Display "@display" uses a path but the path is undefined.', array(
      '@display' => $this->display->display_title,
    ));
  }
  // Validate style plugin.
  $style = $this->get_plugin();
  if (empty($style)) {
    $errors[] = t('Display "@display" has an invalid style plugin.', array(
      '@display' => $this->display->display_title,
    ));
  }
  else {
    $result = $style->validate();
    if (!empty($result) && is_array($result)) {
      $errors = array_merge($errors, $result);
    }
  }
  // Validate query plugin.
  $query = $this->get_plugin('query');
  $result = $query->validate();
  if (!empty($result) && is_array($result)) {
    $errors = array_merge($errors, $result);
  }
  // Validate handlers.
  foreach (views_object_types() as $type => $info) {
    foreach ($this->get_handlers($type) as $handler) {
      $result = $handler->validate();
      if (!empty($result) && is_array($result)) {
        $errors = array_merge($errors, $result);
      }
    }
  }
  return $errors;
}