class image_gallery_join_subquery in Image 7

Join handler for relationships that join with a subquery as the left field. To use this join, set 'left query' in the definition as a subquery to go on the left side of the JOIN condition, ie: LEFT JOIN node node_term_data ON ([YOUR SUBQUERY HERE]) = node_term_data.nid This should ultimately be replaced with the stuff for general groupwise max relationships in views:

Hierarchy

• class \views_join
  • class \image_gallery_join_subquery

See also

<http://drupal.org/node/470258>.

File

contrib/image_gallery/views/image_gallery.views.inc, line 242

Image Gallery views integration.

class image_gallery_join_subquery extends views_join {

  // PHP 4 doesn't call constructors of the base class automatically from a
  // constructor of a derived class. It is your responsibility to propagate
  // the call to constructors upstream where appropriate.
  function construct($table = NULL, $left_table = NULL, $left_field = NULL, $field = NULL, $extra = array(), $type = 'LEFT') {
    parent::construct($table, $left_table, $left_field, $field, $extra, $type);
    $this->left_query = $this->definition['left query'];
  }

  /**
   * Build the SQL for the join this object represents.
   */
  function join($table, &$query) {
    $left = $query
      ->get_table_info($this->left_table);
    $output = " {$this->type} JOIN {" . $this->table . "} {$table['alias']} ON ({$this->left_query}) = {$table['alias']}.{$this->field}";

    // Tack on the extra.
    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'] . '.';
          }

          // And now deal with the value and the operator.  Set $q to
          // a single-quote for non-numeric values and the
          // empty-string for numeric values, then wrap all values in $q.
          $raw_value = $this
            ->db_safe($info['value']);
          $q = empty($info['numeric']) ? "'" : '';
          if (is_array($raw_value)) {
            $operator = !empty($info['operator']) ? $info['operator'] : 'IN';

            // Transform from IN() notation to = notation if just one value.
            if (count($raw_value) == 1) {
              $value = $q . array_shift($raw_value) . $q;
              $operator = $operator == 'NOT IN' ? '!=' : '=';
            }
            else {
              $value = "({$q}" . implode("{$q}, {$q}", $raw_value) . "{$q})";
            }
          }
          else {
            $operator = !empty($info['operator']) ? $info['operator'] : '=';
            $value = "{$q}{$raw_value}{$q}";
          }
          $extras[] = "{$join_table}{$info['field']} {$operator} {$value}";
        }
        if ($extras) {
          if (count($extras) == 1) {
            $output .= ' AND ' . array_shift($extras);
          }
          else {
            $output .= ' AND (' . implode(' ' . $this->extra_type . ' ', $extras) . ')';
          }
        }
      }
      else {
        if ($this->extra && is_string($this->extra)) {
          $output .= " AND ({$this->extra})";
        }
      }
    }
    return $output;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
image_gallery_join_subquery::construct		function	Construct the views_join object. Overrides views_join::construct
image_gallery_join_subquery::join		function	Build the SQL for the join this object represents.
views_join::$definition	public	property
views_join::$extra	public	property
views_join::$field	public	property
views_join::$left_field	public	property
views_join::$left_table	public	property
views_join::$table	public	property
views_join::$type	public	property
views_join::build_join	public	function	Build the SQL for the join this object represents.	1