1 view.inc view::fix_missing_relationships()

Attempt to discover if the view has handlers missing relationships.

This will try to add relationships automatically if it can, and will remove the handlers if it cannot.

File

core/modules/views/includes/view.inc, line 621
Provides the view object type and associated methods.

Class

view
An object to contain all of the data to generate a view, plus the member functions to build the view query, execute the query and render the output.

Code

function fix_missing_relationships() {
  if (isset($this->relationships_fixed)) {
    return;
  }

  $this->relationships_fixed = TRUE;

  // Go through all of our handler types and test them to see if they
  // are missing relationships. Missing relationships can cause fatally
  // broken Views.
  $base_tables = array(
    $this->base_table => TRUE,
    '#global' => TRUE,
  );

  // For each relationship we have, make sure we mark the base it provides as
  // available.
  foreach ($this->display_handler->get_option('relationships') as $id => $options) {
    $options['table'] = views_move_table($options['table']);
    $data = views_fetch_data($options['table'], FALSE);
    if (isset($data[$options['field']]['relationship']['base'])) {
      $base_tables[$data[$options['field']]['relationship']['base']] = TRUE;
    }
  }

  $base_tables = array_keys($base_tables);
  $missing_base_tables = array();

  $types = views_object_types();
  foreach ($types as $key => $info) {
    foreach ($this->display_handler->get_option($info['plural']) as $id => $options) {
      $options['table'] = views_move_table($options['table']);
      $data = views_fetch_data($options['table'], FALSE);

      $valid_bases = array($options['table']);
      if (isset($data['table']['join'])) {
        $valid_bases = array_merge($valid_bases, array_keys($data['table']['join']));
      }

      // If the base table is missing, record it so we can try to fix it.
      if (!array_intersect($valid_bases, $base_tables)) {
        $missing_base_tables[$options['table']][] = array('type' => $key, 'id' => $id);
      }
    }
  }

  if (!empty($missing_base_tables)) {
    // This will change handlers, so make sure any existing handlers get
    // tossed.
    $this->display_handler->handlers = array();
    $this->relationships_changed = TRUE;
    $this->changed = TRUE;

    // Try to fix it.
    foreach ($missing_base_tables as $table => $handlers) {
      $data = views_fetch_data($table);
      $relationship = NULL;

      // Does the missing base table have a default relationship we can
      // throw in?
      if (isset($data['table']['default_relationship'][$this->base_table])) {
        // Create the relationship.
        $info = $data['table']['default_relationship'][$this->base_table];

        $relationship_options = isset($info['options']) ? $info['options'] : array();
        $relationship = $this->add_item($this->current_display, 'relationship', $info['table'], $info['field'], $relationship_options);
      }
      foreach ($handlers as $handler) {
        $options = $this->display_handler->get_option($types[$handler['type']]['plural']);
        if ($relationship) {
          $options[$handler['id']]['relationship'] = $relationship;
        }
        else {
          unset($options[$handler['id']]);
        }
        $this->display_handler->set_option($types[$handler['type']]['plural'], $options);
      }
    }
  }
}