function content_handler_field_multiple::pre_render in Content Construction Kit (CCK) 6.2

Same name and namespace in other branches

1. 6.3 includes/views/handlers/content_handler_field_multiple.inc \content_handler_field_multiple::pre_render()

File

includes/views/handlers/content_handler_field_multiple.inc, line 129

An extended subclass for field handling that adds multiple field grouping.

Class

content_handler_field_multiple

@file An extended subclass for field handling that adds multiple field grouping.

Code

function pre_render($values) {

  // If there are no values to render (displaying a summary, or query returned no results),
  // or if this is not a grouped field, do nothing specific.
  if (isset($this->view->build_info['summary']) || empty($values) || !$this->defer_query) {
    return parent::pre_render($values);
  }
  $field = $this->content_field;
  $db_info = content_database_info($field);
  $options = $this->options;

  // Build the list of vids to retrieve.
  // TODO: try fetching from cache_content first ??
  $vids = array();
  $this->field_values = array();
  foreach ($values as $result) {
    if (isset($result->{$this->field_alias})) {
      $vids[] = $result->{$this->field_alias};
    }
  }

  // It may happend that the multiple values field is related to a non
  // required relation for which no node data related to the field being
  // processed here is available.
  if (empty($vids)) {
    return parent::pre_render($values);
  }

  // List columns to retrieve.
  $alias = content_views_tablename($field);

  // Prefix aliases with '_' to avoid clashing with field columns names.
  $query_columns = array(
    'vid AS _vid',
    "delta as _delta",
    // nid is needed to generate the links for 'link to node' option.
    'nid AS _nid',
  );

  // The actual field columns.
  foreach ($db_info['columns'] as $column => $attributes) {
    $query_columns[] = "{$attributes['column']} AS {$column}";
  }
  $query = 'SELECT ' . implode(', ', $query_columns) . ' FROM {' . $db_info['table'] . "}" . " WHERE vid IN (" . implode(',', $vids) . ')' . " ORDER BY _nid ASC, _delta " . ($options['multiple']['multiple_reversed'] ? 'DESC' : 'ASC');
  $result = db_query($query);
  while ($item = db_fetch_array($result)) {

    // Clean up the $item from vid and delta. We keep nid for now.
    $vid = $item['_vid'];
    unset($item['_vid']);
    $delta = !empty($item['_delta']) ? $item['_delta'] : 0;
    $item['#delta'] = $item['_delta'];
    unset($item['_delta']);
    $this->field_values[$vid][$delta] = $item;
  }
}