public function views_handler_relationship_groupwise_max::query in Views (for Drupal 7) 7.3

Called to implement a relationship in a query. This is mostly a copy of our parent's query() except for this bit with the join class.

Overrides views_handler_relationship::query

File

handlers/views_handler_relationship_groupwise_max.inc, line 351

Definition of views_handler_relationship_groupwise_max.

Class

views_handler_relationship_groupwise_max

Relationship handler that allows a groupwise maximum of the linked in table.

Code

public function query() {

  // Figure out what base table this relationship brings to the party.
  $table_data = views_fetch_data($this->definition['base']);
  $base_field = empty($this->definition['base field']) ? $table_data['table']['base']['field'] : $this->definition['base field'];
  $this
    ->ensure_my_table();
  $def = $this->definition;
  $def['table'] = $this->definition['base'];
  $def['field'] = $base_field;
  $def['left_table'] = $this->table_alias;
  $def['left_field'] = $this->field;
  if (!empty($this->options['required'])) {
    $def['type'] = 'INNER';
  }
  if ($this->options['subquery_regenerate']) {

    // For testing only, regenerate the subquery each time.
    $def['left_query'] = $this
      ->left_query($this->options);
  }
  else {

    // Get the stored subquery SQL string.
    $cid = 'views_relationship_groupwise_max:' . $this->view->name . ':' . $this->view->current_display . ':' . $this->options['id'];
    $cache = cache_get($cid, 'cache_views_data');
    if (isset($cache->data)) {
      $def['left_query'] = $cache->data;
    }
    else {
      $def['left_query'] = $this
        ->left_query($this->options);
      cache_set($cid, $def['left_query'], 'cache_views_data');
    }
  }
  if (!empty($def['join_handler']) && class_exists($def['join_handler'])) {
    $join = new $def['join_handler']();
  }
  else {
    $join = new views_join_subquery();
  }
  $join->definition = $def;
  $join
    ->construct();
  $join->adjusted = TRUE;

  // Use a short alias for this.
  $alias = $def['table'] . '_' . $this->table;
  $this->alias = $this->query
    ->add_relationship($alias, $join, $this->definition['base'], $this->relationship);
}