public function views_join_subquery::build_join

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 views_join::build_join

File

modules/views/includes/handlers.inc, line 1177

Defines the various handler objects to help build and display views.

Class

views_join_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

Code

public function build_join($select_query, $table, $view_query) {
  if (empty($this->definition['table formula'])) {
    $right_table = "{" . $this->table . "}";
  }
  else {
    $right_table = $this->definition['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.
  // @see http://drupal.org/node/1118100
  if (isset($this->extra)) {
    // If extra has been provided as string instead of an array, convert it
    // to an array.
    if (!is_array($this->extra)) {
      $this->extra = array($this->extra);
    }

    $extras = array();
    foreach ($this->extra as $info) {
      if (is_array($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] = $info['value'];
      }
      elseif (is_string($info)) {
        $extras[] = $info;
      }
    }

    if ($extras) {
      if (count($extras) == 1) {
        $condition .= ' AND (' . array_shift($extras) . ')';
      }
      else {
        $condition .= ' AND (' . implode(' ' . $this->extra_type . ' ', $extras) . ')';
      }
    }
  }

  $select_query->addJoin($this->type, $right_table, $table['alias'], $condition, $arguments);
}