public function Subquery::buildJoin in RNG - Events and Registrations 8.2

Same name and namespace in other branches

1. 3.x src/Plugin/views/join/Subquery.php \Drupal\rng\Plugin\views\join\Subquery::buildJoin()

Builds the SQL for the join this object represents.

Parameters

\Drupal\Core\Database\Query\SelectInterface $select_query: The select query object.

string $table: The base table to join.

\Drupal\views\Plugin\views\query\QueryPluginBase $view_query: The source views query.

Overrides JoinPluginBase::buildJoin

File

src/Plugin/views/join/Subquery.php, line 58

Class

Subquery

Join handler for relationships that join with a subquery as a table.

Namespace

Drupal\rng\Plugin\views\join

Code

public function buildJoin($select_query, $table, $view_query) {
  $alias = $this->configuration['subquery_alias'];
  $subquery = $this->database
    ->select($this->configuration['subquery_table'], $alias);
  if (!empty($this->configuration['subquery_fields'])) {
    foreach ($this->configuration['subquery_fields'] as $field_alias => $field) {
      $subquery
        ->addField($alias, $field, $field_alias);
    }
  }
  if (!empty($this->configuration['subquery_expressions'])) {
    foreach ($this->configuration['subquery_expressions'] as $field_alias => $expression) {
      $subquery
        ->addExpression($expression, $field_alias);
    }
  }
  if (!empty($this->configuration['subquery_groupby'])) {
    $subquery
      ->groupBy($this->configuration['subquery_groupby']);
  }
  if (!empty($this->configuration['subquery_where'])) {
    foreach ($this->configuration['subquery_where'] as $condition) {
      $subquery
        ->where($condition);
    }
  }
  $right_table = $subquery;
  $left_table = $view_query
    ->getTableInfo($this->leftTable);
  $left_field = "{$left_table['alias']}.{$this->leftField}";

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

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

        // 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);
}