public function Subquery::buildJoin in Views (for Drupal 7) 8.3

Build the SQL for the join this object represents.

Parameters

$select_query: An implementation of SelectQueryInterface.

$table: The base table to join.

$view_query: The source query, implementation of views_plugin_query.

Overrides JoinPluginBase::buildJoin

File

lib/Drupal/views/Plugin/views/join/Subquery.php, line 48

Definition of Drupal\views\Plugin\views\join\Subquery.

Class

Subquery

Join handler for relationships that join with a subquery as the left field. eg: LEFT JOIN node node_term_data ON ([YOUR SUBQUERY HERE]) = node_term_data.nid

Namespace

Drupal\views\Plugin\views\join

Code

public function buildJoin($select_query, $table, $view_query) {
  if (empty($this->configuration['table formula'])) {
    $right_table = "{" . $this->table . "}";
  }
  else {
    $right_table = $this->configuration['table formula'];
  }

  // Add our join condition, using a subquery on the left instead of a field.
  $condition = "({$this->left_query}) = {$table['alias']}.{$this->field}";
  $arguments = array();

  // Tack on the extra.
  // This is just copied verbatim from the parent class, which itself has a bug: http://drupal.org/node/1118100
  if (isset($this->extra)) {
    if (is_array($this->extra)) {
      $extras = array();
      foreach ($this->extra as $info) {
        $extra = '';

        // Figure out the table name. Remember, only use aliases provided
        // if at all possible.
        $join_table = '';
        if (!array_key_exists('table', $info)) {
          $join_table = $table['alias'] . '.';
        }
        elseif (isset($info['table'])) {
          $join_table = $info['table'] . '.';
        }
        $placeholder = ':views_join_condition_' . $select_query
          ->nextPlaceholder();
        if (is_array($info['value'])) {
          $operator = !empty($info['operator']) ? $info['operator'] : 'IN';

          // Transform from IN() notation to = notation if just one value.
          if (count($info['value']) == 1) {
            $info['value'] = array_shift($info['value']);
            $operator = $operator == 'NOT IN' ? '!=' : '=';
          }
        }
        else {
          $operator = !empty($info['operator']) ? $info['operator'] : '=';
        }
        $extras[] = "{$join_table}{$info['field']} {$operator} {$placeholder}";
        $arguments[$placeholder] = $info['value'];
      }
      if ($extras) {
        if (count($extras) == 1) {
          $condition .= ' AND ' . array_shift($extras);
        }
        else {
          $condition .= ' AND (' . implode(' ' . $this->extraOperator . ' ', $extras) . ')';
        }
      }
    }
    elseif ($this->extra && is_string($this->extra)) {
      $condition .= " AND ({$this->extra})";
    }
  }
  $select_query
    ->addJoin($this->type, $right_table, $table['alias'], $condition, $arguments);
}