function views_field_join::build_join in Views Field 7

Build the SQL for the join this object represents.

This is identical to parent method except for condition clause.

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

./views_field.join.inc, line 30

Provides a multi-column join on field tables.

Class

views_field_join

A function class to represent a multi-column join and create the SQL necessary to implement the join.

Code

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'];
  }

  // This is all that differs from the parent function.
  $condition = $this
    ->build_multi_join($table, $view_query);
  $arguments = array();

  // 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'])) {

          // If we're aware of a table alias for this table, use the table
          // alias instead of the table name.
          if (isset($left) && $left['table'] == $info['table']) {
            $join_table = $left['alias'] . '.';
          }
          else {
            $join_table = $info['table'] . '.';
          }
        }

        // Convert a single-valued array of values to the single-value case,
        // and transform from IN() notation to = notation
        if (is_array($info['value']) && count($info['value']) == 1) {
          if (empty($info['operator'])) {
            $operator = '=';
          }
          else {
            $operator = $info['operator'] == 'NOT IN' ? '!=' : '=';
          }
          $info['value'] = array_shift($info['value']);
        }
        if (is_array($info['value'])) {

          // With an array of values, we need multiple placeholders and the
          // 'IN' operator is implicit.
          foreach ($info['value'] as $value) {
            $placeholder_i = ':views_join_condition_' . $select_query
              ->nextPlaceholder();
            $arguments[$placeholder_i] = $value;
          }
          $operator = !empty($info['operator']) ? $info['operator'] : 'IN';
          $placeholder = '( ' . implode(', ', array_keys($arguments)) . ' )';
        }
        else {

          // With a single value, the '=' operator is implicit.
          $operator = !empty($info['operator']) ? $info['operator'] : '=';
          $placeholder = ':views_join_condition_' . $select_query
            ->nextPlaceholder();
          $arguments[$placeholder] = $info['value'];
        }
        $extras[] = "{$join_table}{$info['field']} {$operator} {$placeholder}";
      }
      if ($extras) {
        if (count($extras) == 1) {
          $condition .= ' AND ' . array_shift($extras);
        }
        else {
          $condition .= ' AND (' . implode(' ' . $this->extra_type . ' ', $extras) . ')';
        }
      }
    }
    elseif ($this->extra && is_string($this->extra)) {
      $condition .= " AND ({$this->extra})";
    }
  }
  $select_query
    ->addJoin($this->type, $right_table, $table['alias'], $condition, $arguments);
}