function views_many_to_one_helper::add_table

Add a table to the query.

This is an advanced concept; not only does it add a new instance of the table, but it follows the relationship path all the way down to the relationship link point and adds *that* as a new relationship and then adds the table to the relationship, if necessary.

File

includes/handlers.inc, line 875

Class

views_many_to_one_helper

This many to one helper object is used on both arguments and filters.

Code

public function add_table($join = NULL, $alias = NULL) {
    // This is used for lookups in the many_to_one table.
    $field = $this->handler->relationship . '_' . $this->handler->table . '.' . $this->handler->field;
    if (empty($join)) {
        $join = $this->get_join();
    }
    // See if there's a chain between us and the base relationship. If so, we
    // need to create a new relationship to use.
    $relationship = $this->handler->relationship;
    // Determine the primary table to seek.
    if (empty($this->handler->query->relationships[$relationship])) {
        $base_table = $this->handler->query->base_table;
    }
    else {
        $base_table = $this->handler->query->relationships[$relationship]['base'];
    }
    // Cycle through the joins. This isn't as error-safe as the normal
    // ensure_path logic. Perhaps it should be.
    $r_join = clone $join;
    while (!empty($r_join) && $r_join->left_table != $base_table) {
        $r_join = views_get_table_join($r_join->left_table, $base_table);
    }
    // If we found that there are tables in between, add the relationship.
    if ($r_join->table != $join->table) {
        $relationship = $this->handler->query
            ->add_relationship($this->handler->table . '_' . $r_join->table, $r_join, $r_join->table, $this->handler->relationship);
    }
    // And now add our table, using the new relationship if one was used.
    $alias = $this->handler->query
        ->add_table($this->handler->table, $relationship, $join, $alias);
    // Store what values are used by this table chain so that other chains can
    // automatically discard those values.
    if (empty($this->handler->view->many_to_one_tables[$field])) {
        $this->handler->view->many_to_one_tables[$field] = $this->handler->value;
    }
    else {
        $this->handler->view->many_to_one_tables[$field] = array_merge($this->handler->view->many_to_one_tables[$field], $this->handler->value);
    }
    return $alias;
}